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An airliner is a type of
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engine ...
for transporting passengers and air cargo. Such aircraft are most often operated by
airline An airline is a company that provides air transport services for traveling passengers and freight. Airlines use aircraft to supply these services and may form partnerships or alliances with other airlines for codeshare agreements, in wh ...
s. Although the definition of an airliner can vary from country to country, an airliner is typically defined as an
airplane An airplane or aeroplane (informally plane) is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, Propeller (aircraft), propeller, or rocket engine. Airplanes come in a variety of sizes, shapes, and wing configurat ...
intended for carrying multiple passengers or cargo in commercial service. The largest of them are
wide-body A wide-body aircraft, also known as a twin-aisle aircraft, is an airliner with a fuselage wide enough to accommodate two passenger aisles with seven or more seats abreast. The typical fuselage diameter is . In the typical wide-body economy cabin ...
jets which are also called twin-aisle because they generally have two separate aisles running from the front to the back of the passenger cabin. These are usually used for
long-haul flights In aviation, the flight length refers to the distance of a flight. Commercial flights are often categorized into long-, medium- or short-haul by commercial airlines based on flight length, although there is no international standard definition and ...
between
airline hub An airline hub or hub airport is an airport used by one or more airlines to concentrate passenger traffic and flight operations. Hubs serve as transfer (or stop-over) points to help get passengers to their final destination. It is part of the ...
s and major cities. A smaller, more common class of airliners is the
narrow-body A narrow-body aircraft or single-aisle aircraft is an airliner arranged along a single aisle, permitting up to 6-abreast seating in a cabin less than in width. In contrast, a wide-body aircraft is a larger airliner usually configured with mu ...
or single-aisle. These are generally used for short to medium-distance flights with fewer passengers than their wide-body counterparts.
Regional airliner A regional airliner or a feederliner is a small airliner that is designed to fly up to 100 passengers on short-haul flights, usually feeding larger carriers' airline hubs from small markets. This class of airliners is typically flown by the r ...
s typically seat fewer than 100 passengers and may be powered by
turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanic ...
s or
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
s. These airliners are the non- mainline counterparts to the larger aircraft operated by the major carriers, legacy carriers, and
flag carrier A flag carrier is a transport company, such as an airline or shipping company, that, being locally registered in a given sovereign state, enjoys preferential rights or privileges accorded by the government for international operations. Hi ...
s, and are used to feed traffic into the large airline hubs. These regional routes then form the spokes of a hub-and-spoke air transport model. The lightest (
light aircraft A light aircraft is an aircraft that has a maximum gross takeoff weight of or less.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 308. Aviation Supplies & Academics, 1997. Light aircraft are used as utility aircraft co ...
, list of light transport aircraft) of short-haul regional feeder airliner type aircraft that carry a small number of passengers are called commuter aircraft, commuterliners, feederliners, and
air taxi An air taxi is a small commercial aircraft that makes short flights on demand. In 2001 air taxi operations were promoted in the United States by a NASA and aerospace industry study on the potential Small Aircraft Transportation System (SATS) ...
s, depending on their size, engines, how they are marketed, region of the world, and seating configurations. The Beechcraft 1900, for example, has only 19 seats.


History


Emergence

When the Wright brothers made the world's first sustained
heavier-than-air flight An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. ...
, they laid the foundation for what would become a major transport industry. Their flight, performed in the
Wright Flyer The ''Wright Flyer'' (also known as the ''Kitty Hawk'', ''Flyer'' I or the 1903 ''Flyer'') made the first sustained flight by a manned heavier-than-air powered and controlled aircraft—an airplane—on December 17, 1903. Invented and flown b ...
during 1903, was just 11 years before what is often defined as the world's first airliner.Tise, Larry E. Conquering the Sky. New York: Palgrave MacMillan, 2009. Print. By the 1960s, airliners had expanded capabilities, making a significant impact on global society, economics, and politics.Bernardo, James V. Aviation and Space: In the Modern World. New York: E.P. Dutton. 1968. During 1913,
Igor Sikorsky Igor Ivanovich Sikorsky (russian: И́горь Ива́нович Сико́рский, p=ˈiɡərʲ ɪˈvanəvitʃ sʲɪˈkorskʲɪj, a=Ru-Igor Sikorsky.ogg, tr. ''Ígor' Ivánovich Sikórskiy''; May 25, 1889 – October 26, 1972)Fortie ...
developed the first large multi-engine airplane, the Russky Vityaz. This aircraft was subsequently refined into the more practical
Ilya Muromets Ilya Muromets (russian: Илья Муромец), or Ilya of Murom, sometimes Ilya Murometz, is one of the ''bogatyrs'' (epic knights) in Bylinas of Kievan Rus. He is often featured alongside fellow bogatyrs Dobrynya Nikitich and Alyosha Popo ...
, being furnished with dual controls for a pilot and copilot and a comfortable cabin with a lavatory, cabin heating and lighting. This large four-engine biplane was further adapted into an early
bomber aircraft A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an airc ...
, preceding subsequent transport and bomber aircraft. It first flew on 10 December 1913 and took off for its first demonstration flight with 16 passengers aboard on 25 February 1914. However, it was never used as a commercial airliner due to the onset of the
First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
which led to military applications being prioritised.


Interwar period

In 1919, shortly after the end of the First World War, large numbers of ex-military aircraft flooded the market. One such aircraft was the French Farman F.60 Goliath, which had originally been designed as a long-range
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
; a number were converted for commercial use into passenger airliners starting in 1919, being able to accommodate a maximum of 14 seated passengers. and around 60 were built. Initially, several publicity flights were made, including one on 8 February 1919, when the Goliath flew 12 passengers from
Toussus-le-Noble Toussus-le-Noble () is a commune in the Yvelines department in the Île-de-France region in north-central France. History In 1969, the communes of Châteaufort and Toussus-le-Noble were separated from the Essonne department and added to Yvelin ...
to
RAF Kenley The former Royal Air Force Station Kenley, more commonly known as RAF Kenley was an airfield station of the Royal Flying Corps in the First World War and the RAF in the Second World War. It played a significant role during the Battle of Britai ...
, near
Croydon Croydon is a large town in south London, England, south of Charing Cross. Part of the London Borough of Croydon, a local government district of Greater London. It is one of the largest commercial districts in Greater London, with an extensi ...
, despite having no permission from the British authorities to land. Dozens of early airlines subsequently procured the type. One high-profile flight, made on 11 August 1919, involved an F.60 flying eight passengers and a ton of supplies from Paris via Casablanca and
Mogador Essaouira ( ; ar, الصويرة, aṣ-Ṣawīra; shi, ⵜⴰⵚⵚⵓⵔⵜ, Taṣṣort, formerly ''Amegdul''), known until the 1960s as Mogador, is a port city in the western Moroccan region of Marakesh-Safi, on the Atlantic coast. It ha ...
to Koufa, north of Saint-Louis, Senegal, flying more than . Another important airliner built in 1919 was the Airco DH.16; a redesigned
Airco DH.9A The Airco DH.9A was a British single-engined light bomber designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucially, repla ...
with a wider
fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraf ...
to accommodate an enclosed cabin seating four passengers, plus pilot in an open cockpit. In March 1919, the prototype first flew at
Hendon Aerodrome Hendon Aerodrome was an aerodrome in London, England, that was an important centre for aviation from 1908 to 1968. It was situated in Colindale, north west of Charing Cross. It nearly became a central hub of civil aviation ("the Charing Cros ...
. Nine aircraft were built, all but one being delivered to the nascent airline, Aircraft Transport and Travel, which used the first aircraft for pleasure flying, and on 25 August 1919, it inaugurated the first scheduled international airline service from London to Paris.Jackson 1973, p .62. One aircraft was sold to the River Plate Aviation Company in
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
, to operate a cross-river service between
Buenos Aires Buenos Aires ( or ; ), officially the Autonomous City of Buenos Aires ( es, link=no, Ciudad Autónoma de Buenos Aires), is the capital and primate city of Argentina. The city is located on the western shore of the Río de la Plata, on South ...
and Montevideo. Meanwhile, the competing
Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public i ...
converted its successful First World War era bomber, the
Vickers Vimy The Vickers Vimy was a British heavy bomber aircraft developed and manufactured by Vickers Limited. Developed during the latter stages of the First World War to equip the Royal Flying Corps (RFC), the Vimy was designed by Reginald Kirshaw "Rex" ...
, into a civilian version, the Vimy Commercial. It was redesigned with a larger-diameter fuselage (largely of spruce plywood), and first flew from the Joyce Green airfield in
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
on 13 April 1919.Andrews and Morgan 1988, p. 95.Jackson 1988, p. 202. The world's first all-metal transport aircraft was the Junkers F.13, which also made its first flight in 1919. Junkers marketed the aircraft towards business travellers and commercial operators, and European entrepreneurs bought examples for their private use and business trips. Over 300 Junkers F 13s were built between 1919 and 1932. The Dutch Fokker company produced the Fokker F.II, then the enlarged F.III. These were used by the Dutch airline KLM, including on its Amsterdam-London service in 1921. A relatively reliable aircraft for the era, the Fokkers were flying to destinations across Europe, including Bremen, Brussels, Hamburg, and Paris. The Handley Page company in Britain produced the
Handley Page Type W The Handley Page W.8, W.9 and W.10 were British two- and three-engine medium-range biplane airliners designed and built by Handley Page. The W.8 (also known as the H.P.18) was the company's first purpose-built civil airliner although it was a ...
, its first civil transport aircraft. It housed two crew in an open cockpit and 15 passengers in an enclosed cabin. Powered by two
Napier Lion The Napier Lion is a 12-cylinder, petrol-fueled 'broad arrow' W12 configuration aircraft engine built by D. Napier & Son from 1917 until the 1930s. A number of advanced features made it the most powerful engine of its day and kept it in prod ...
engines, the prototype first flew on 4 December 1919, shortly after it was displayed at the 1919
Paris Air Show The Paris Air Show (french: Salon international de l'aéronautique et de l'espace de Paris-Le Bourget, Salon du Bourget) is a trade fair and air show held in odd years at Paris–Le Bourget Airport in north Paris, France. Organized by the French ...
at
Le Bourget Le Bourget () is a commune in the northeastern suburbs of Paris, France. It is located from the center of Paris. The commune features Le Bourget Airport, which in turn hosts the Musée de l'Air et de l'Espace (Air and Space Museum). A very ...
. It was ordered by the Belgian firm
Sabena The ''Societé anonyme belge d'Exploitation de la Navigation aérienne'' (French; ), better known by the acronym Sabena or SABENA, was the national airline of Belgium from 1923 to 2001, with its base at Brussels National Airport. After its ba ...
, a further ten Type Ws were produced under license in Belgium by SABCA. In 1921 the
Air Ministry The Air Ministry was a department of the Government of the United Kingdom with the responsibility of managing the affairs of the Royal Air Force, that existed from 1918 to 1964. It was under the political authority of the Secretary of State ...
ordered three aircraft, built as the W.8b, for use by
Handley Page Transport Handley Page Transport Ltd was an airline company founded in 1919, soon after the end of the First World War, by Frederick Handley Page. The company's first planes were Handley Page Type O/400 bombers modified for passenger use. They flew a Lo ...
, and later by
Imperial Airways Imperial Airways was the early British commercial long-range airline, operating from 1924 to 1939 and principally serving the British Empire routes to South Africa, India, Australia and the Far East, including Malaya and Hong Kong. Passengers ...
, on services to
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), ma ...
and
Brussels Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
. In France, the Bleriot-SPAD S.33 was introduced during the early 1920s. It was commercially successful, initially serving the Paris-
London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...
route, and later on
continental Continental may refer to: Places * Continent, the major landmasses of Earth * Continental, Arizona, a small community in Pima County, Arizona, US * Continental, Ohio, a small town in Putnam County, US Arts and entertainment * ''Continental'' ( ...
routes. The enclosed cabin could carry four passengers with an extra seat in the cockpit. It was further developed into the Blériot-SPAD S.46. Throughout the 1920s, companies in Britain and France were at the forefront of the civil airliner industry. By 1921, the capacity of airliners needed to be increased to achieve more favourable economics. The English company de Havilland, built the 10-passenger DH.29 monoplane,Jackson 1973, . while starting work on the design of the DH.32, an eight-seater biplane with a more economical but less powerful
Rolls-Royce Eagle The Rolls-Royce Eagle was the first aircraft engine to be developed by Rolls-Royce Limited. Introduced in 1915 to meet British military requirements during World War I, it was used to power the Handley Page Type O bombers and a number of oth ...
engine.Jackson 1987, pp. 508–525. For more capacity, DH.32 development was replaced by the
DH.34 The de Havilland DH.34 was a single engined British biplane airliner built by the de Havilland Aircraft Company in the 1920s. 12 were built, with the DH.34 serving with Imperial Airways and its predecessors for several years. Design and develo ...
biplane, accommodating 10 passengers. A commercially successful aircraft,
Daimler Airway Daimler Airway was an airline subsidiary of the Birmingham Small Arms Company (BSA)'s Daimler Company. It was created to use some of the assets of the failed ventures Airco and its subsidiary, Aircraft Transport and Travel, which was acquired ...
ordered a batch of nine. The Ford Trimotor had two engines mounted on the wings and one in the nose, and a slabsided body, it carried eight passengers and was produced from 1925 to 1933. It was an important early airliner in America. It was used by the predecessor to Trans World Airlines, and by other airlines long after production ceased. The Trimotor helped to popularise numerous aspects of modern aviation infrastructure, including paved
runway According to the International Civil Aviation Organization (ICAO), a runway is a "defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft". Runways may be a man-made surface (often asphalt, concre ...
s, passenger terminals,
hangar A hangar is a building or structure designed to hold aircraft or spacecraft. Hangars are built of metal, wood, or concrete. The word ''hangar'' comes from Middle French ''hanghart'' ("enclosure near a house"), of Germanic origin, from Frankish ...
s,
airmail Airmail (or air mail) is a mail transport service branded and sold on the basis of at least one leg of its journey being by air. Airmail items typically arrive more quickly than surface mail, and usually cost more to send. Airmail may be t ...
, and
radio navigation Radio navigation or radionavigation is the application of radio frequencies to determine a position of an object on the Earth, either the vessel or an obstruction. Like radiolocation, it is a type of radiodetermination. The basic principles a ...
.Herrick, Greg A. ''fordtri-motor.com'', Yellowstone Aviation, Inc (Jackson, Wyoming), 2004. Retrieved: 4 April 2019.
Pan Am Pan American World Airways, originally founded as Pan American Airways and commonly known as Pan Am, was an American airline that was the principal and largest international air carrier and unofficial overseas flag carrier of the United States ...
opened up transoceanic service in the late 1920s and early 1930s, based on a series of large seaplanes – the
Sikorsky S-38 The Sikorsky S-38 was an American twin-engined ten-seat sesquiplane amphibious aircraft. It was Sikorsky's first widely produced amphibious flying boat, serving successfully for Pan American Airways and the United States military. Design and de ...
through
Sikorsky S-42 The Sikorsky S-42 was a commercial flying boat designed and built by Sikorsky Aircraft to meet requirements for a long-range flying boat laid out by Pan American World Airways (Pan Am) in 1931. The innovative design included wing flaps, variabl ...
.Daley, Robert, An American Saga, 1980, Random House, New York, , pp. 103-110. By the 1930s, the airliner industry had matured and large consolidated national airlines were established with regular international services that spanned the globe, including
Imperial Airways Imperial Airways was the early British commercial long-range airline, operating from 1924 to 1939 and principally serving the British Empire routes to South Africa, India, Australia and the Far East, including Malaya and Hong Kong. Passengers ...
in Britain, Lufthansa in Germany, KLM in the Netherlands, and
United Airlines United Airlines, Inc. (commonly referred to as United), is a major American airline headquartered at the Willis Tower in Chicago, Illinois.
in America. Multi-engined aircraft were now capable of transporting dozens of passengers in comfort. During the 1930s, the British
de Havilland Dragon The de Havilland DH.84 Dragon is a successful small commercial aircraft that was designed and built by the de Havilland company. Design and construction Following the commercial success of its single-engined de Havilland Fox Moth that had fi ...
emerged as a short-haul, low-capacity airliner. Its relatively simple design could carry six passengers, each with of luggage, on the London-Paris route on a fuel consumption of 13 gal (49 L) per hour. The DH.84 Dragon entered worldwide service. During early August 1934, one performed the first non-stop flight between the Canadian mainland and Britain in 30 hours 55 minutes, although the intended destination had originally been
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon. I ...
in
Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to the north, Iran to the east, the Persian Gulf and K ...
.Lewis 1971, p. 265. British production of the Dragon ended in favour of the
de Havilland Dragon Rapide The de Havilland DH.89 Dragon Rapide is a 1930s short-haul biplane airliner developed and produced by British aircraft company de Havilland. Capable of accommodating 6–8 passengers, it proved an economical and durable craft, despite its rel ...
, a faster and more comfortable successor.Moss 1966, p. 3. By November 1934, series production of the Dragon Rapide had commenced.Moss 1966, p. 4. De Havilland invested into advanced features including elongated rear windows, cabin heating, thickened wing tips, and a strengthened airframe for a higher gross weight of .Moss 1966, p. 5. Later aircraft were amongst the first airliners to be fitted with
flap Flap may refer to: Arts, entertainment, and media * ''Flap'' (film), a 1970 American film * Flap, a boss character in the arcade game ''Gaiapolis'' * Flap, a minor character in the film '' Little Nemo: Adventures in Slumberland'' Biology and he ...
s for improved landing performance, along with downwards-facing recognition light and metal propellers, which were often retrofitted to older aircraft.Moss 1966, p. 6. It was also used in military roles;Moss 1966, p. 4. civil Dragon Rapides were impressed into military service during the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...
.Moss 1966, pp. 6-7. Metal airliners came into service in the 1930s. In the United States, the
Boeing 247 The Boeing Model 247 is an early United States airliner, and one of the first such aircraft to incorporate advances such as all-metal ( anodized aluminum) semimonocoque construction, a fully cantilevered wing, and retractable landing gear.
,"Model 247 Commercial Transport."
''boeing.com,'' 2009. Retrieved: 14 June 2010.
and the 14-passenger Douglas DC-2, flew during the first half of the decade, while the more powerful, faster, 21–32 passenger Douglas DC-3 first appeared in 1935. DC-3s were produced in quantity for the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...
and were sold as surplus afterward, becoming widespread within the commercial sector. It was one of first airliners to be profitable without the support of postal or government subsidies. Long-haul flights were expanded during the 1930s as Pan American Airways and Imperial Airways competed on transatlantic travel using fleets of flying boats, such as the British
Short Empire The Short Empire was a medium-range four-engined monoplane flying boat, designed and developed by Short Brothers during the 1930s to meet the requirements of the growing commercial airline sector, with a particular emphasis upon its usefulness ...
and the American
Boeing 314 The Boeing 314 Clipper was an American long-range flying boat produced by Boeing from 1938 to 1941. One of the largest aircraft of its time, it had the range to cross the Atlantic and Pacific oceans. For its wing, Boeing re-used the design from ...
.Bogash, Robert A
"In Search of an Icon: The Hunt for a Boeing B-314 Flying Boat, Pan American NC18601 – the Honolulu Clipper"
''rbogash.com.'' Retrieved: 31 July 2011.
Imperial Airways' order for 28 Empire flying boats was viewed by some as a bold gamble. At the time, flying boats were the only practical means of building aircraft of such size and weight as land-based aircraft would have unfeasibly poor field performance.Norris 1966, p. 3. One Boeing 314, registration NC18602, became the first commercial plane to circumnavigate the globe during December 1941 and January 1942.


The postwar era


United Kingdom

In the United Kingdom, the Brabazon Committee was formed in 1942 under
John Moore-Brabazon, 1st Baron Brabazon of Tara Lieutenant-Colonel John Theodore Cuthbert Moore-Brabazon, 1st Baron Brabazon of Tara, , HonFRPS (8 February 1884 – 17 May 1964), was an English aviation pioneer and Conservative politician. He was the first Englishman to pilot a heavier-than ...
to forecast advances in aviation technology and the air transport needs of the postwar
British Empire The British Empire was composed of the dominions, colonies, protectorates, mandates, and other territories ruled or administered by the United Kingdom and its predecessor states. It began with the overseas possessions and trading posts e ...
(in South Asia, Africa, and the Near and
Far East The ''Far East'' was a European term to refer to the geographical regions that includes East and Southeast Asia as well as the Russian Far East to a lesser extent. South Asia is sometimes also included for economic and cultural reasons. The ter ...
) and Commonwealth ( Australia,
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
,
New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
).Masefield and Gunston, 2002, p. 82.Phipp 2007, p. 17. For British use, multi-engine aircraft types were allegedly split between the US for
military transport aircraft A military transport aircraft, military cargo aircraft or airlifter is a military-owned transport aircraft used to support military operations by airlifting troops and military equipment. Transport aircraft are crucial to maintaining supply ...
and the UK for
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
s. That such a policy was suggested or implemented have been disputed, at least by Sir Peter Masefield.Masefield and Gunston, 2002, p. 97. British aircraft manufacturers were tied up to fulfill military requirements, and had no free capacity to address other matters though the war. The committee final report pushed four designs for the state-owned airlines
British Overseas Airways Corporation British Overseas Airways Corporation (BOAC) was the British state-owned airline created in 1939 by the merger of Imperial Airways and British Airways Ltd. It continued operating overseas services throughout World War II. After the pass ...
(BOAC) and later
British European Airways British European Airways (BEA), formally British European Airways Corporation, was a British airline which existed from 1946 until 1974. BEA operated to Europe, North Africa and the Middle East from airports around the United Kingdom. The a ...
(BEA): three piston-powered aircraft of varying sizes, and a jet-powered 100-seat design at the request of
Geoffrey de Havilland Captain Sir Geoffrey de Havilland, (27 July 1882 – 21 May 1965) was an English aviation pioneer and aerospace engineer. The aircraft company he founded produced the Mosquito, which has been considered the most versatile warplane ever built, ...
, involved in the first jet fighters development. After a brief contest, the Type I design was given to the Bristol Aeroplane Company, building on a "100 ton
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an air ...
" submission.Barnes 1964, pp. 324-325. This evolved into the
Bristol Brabazon The Bristol Type 167 Brabazon was a large British piston-engined propeller-driven airliner designed by the Bristol Aeroplane Company to fly transatlantic routes between the UK and the United States. The type was named ''Brabazon'' after the ...
but this project folded in 1951 as BOAC lost interest and the first aircraft needed a costly wing re-design to accommodate the Bristol Proteus engine.Phipp 2007, pp. 67-69. The Type II was split between the
de Havilland Dove The de Havilland DH.104 Dove is a British short-haul airliner developed and manufactured by de Havilland. The design, which was a monoplane successor to the pre-war Dragon Rapide biplane, came about from the Brabazon Committee report which, ...
and
Airspeed Ambassador The Airspeed AS.57 Ambassador is a British twin piston-engined airliner that was designed and produced by the British aircraft manufacturer Airspeed Ltd. It was one of the first postwar airliners to be produced. The Ambassador was developed in ...
conventional piston designs,Phipp 2007, pp. 75-77. and the
Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public i ...
model powered by newly developed
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
s: first flown in 1948, the VC.2 Viceroy was the first turboprop design to enter service;Phipp 2007, p. 81. a commercial success with 445 Viscounts built.Andrews and Morgan 1988, p. 537. The Type III requirement led to the conventional Avro Tudor and the more ambitious Bristol Britannia, although both aircraft suffered protracted developments,Barnes 1964, pp. 347-348. with the latter entering service with BOAC in February 1957, over seven years following its order.Phipp 2007, pp. 105-109. The jet-powered Type IV became the
de Havilland Comet The de Havilland DH.106 Comet was the world's first commercial jet airliner. Developed and manufactured by de Havilland in the United Kingdom, the Comet 1 prototype first flew in 1949. It featured an aerodynamically clean design with four ...
in 1949. It featured an aerodynamically clean design with four de Havilland Ghost turbojet engines buried in the wings, a pressurised fuselage, and large square windows. On 2 May 1952, the Comet took off on the world's first
jetliner A jet airliner or jetliner is an airliner powered by jet engines (passenger jet aircraft). Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today. Airliners are commonly clas ...
flight carrying fare-paying passengers and simultaneously inaugurated scheduled service between London and Johannesburg."On This Day: Comet inaugurates the jet age."
''BBC News,'' 2 May 1952. Retrieved 26 April 2012.
Cookman, Aubrey O. Jr
"I Rode The First Jet Airliner."
''Popular Mechanics'', July 1952, pp. 90–94. Retrieved 26 April 2012.
However, roughly one year after introduction, three Comets broke up mid-flight due to airframe
metal fatigue In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts o ...
, not well understood at the time. The Comet was grounded and tested to discover the cause, while rival manufacturers heeded the lessons learned while developing their own aircraft. The improved Comet 2 and the prototype Comet 3 culminated in the redesigned Comet 4 series which debuted in 1958 and had a productive career over 30 years, but sales never fully recovered.Phipp 2007, pp. 93-97.Jackson 1987, pp. 464-465. By the 1960s, the UK had lost the airliner market to the US due to the Comet disaster and a smaller domestic market, not regained by later designs like the
BAC 1-11 The BAC One-Eleven (or BAC-111/BAC 1-11) was an early jet airliner produced by the British Aircraft Corporation (BAC). Originally conceived by Hunting Aircraft as a 30-seat jet, before its merger into BAC in 1960, it was launched as an 80-se ...
,
Vickers VC10 The Vickers VC10 is a mid-sized, narrow-body long-range British jet airliner designed and built by Vickers-Armstrongs (Aircraft) Ltd and first flown at Brooklands, Surrey, in 1962. The airliner was designed to operate on long-distance route ...
, and
Hawker Siddeley Trident The Hawker Siddeley HS-121 Trident (originally the de Havilland DH.121 and briefly the Airco DH.121) is a British airliner produced by Hawker Siddeley. In 1957, de Havilland proposed its DH.121 trijet design to a British European Airways (BEA ...
. The STAC committee was formed to consider supersonic designs and worked with Bristol to create the Bristol 223, a 100-passenger transatlantic airliner. The effort was later merged with similar efforts in France to create the
Concorde The Aérospatiale/BAC Concorde () is a retired Franco-British supersonic airliner jointly developed and manufactured by Sud Aviation (later Aérospatiale) and the British Aircraft Corporation (BAC). Studies started in 1954, and France an ...
supersonic airliner to share the cost.


United States

The first batch of the
Douglas DC-4 The Douglas DC-4 is an American four-engined (piston), propeller-driven airliner developed by the Douglas Aircraft Company. Military versions of the plane, the C-54 and R5D, served during World War II, in the Berlin Airlift and into the 1 ...
s went to the U.S. Army and Air Forces, and was named the
C-54 Skymaster The Douglas C-54 Skymaster is a four-engined transport aircraft used by the United States Army Air Forces in World War II and the Korean War. Like the Douglas C-47 Skytrain derived from the DC-3, the C-54 Skymaster was derived from a civilian a ...
. Some ex-military DC-6s were later converted into airliners, with both passenger and cargo versions flooding the market shortly after the war's end. Douglas also developed a pressurized version of the DC-4, which it designated the
Douglas DC-6 The Douglas DC-6 is a piston-powered airliner and cargo aircraft built by the Douglas Aircraft Company from 1946 to 1958. Originally intended as a military transport near the end of World War II, it was reworked after the war to compete with t ...
. Rival company Lockheed produced the Constellation, a triple-tailed aircraft with a wider fuselage than the DC-4. The Boeing 377 Stratocruiser was based on the
C-97 Stratofreighter The Boeing C-97 Stratofreighter was a long-range heavy military cargo aircraft developed from the B-29 and B-50 bombers. Design work began in 1942, the first of three prototype XC-97s flew on 9 November 1944 (none saw combat), and the first of s ...
military transport, it had a double deck and a pressurized fuselage. Convair produced the
Convair 240 The Convair CV-240 is an American airliner that Convair manufactured from 1947 to 1954, initially as a possible replacement for the ubiquitous Douglas DC-3. Featuring a more modern design with cabin pressurization, the 240 series made some inro ...
, a 40-person pressurized airplane; 566 examples flew. Convair later developed the
Convair 340 The Convair CV-240 is an American airliner that Convair manufactured from 1947 to 1954, initially as a possible replacement for the ubiquitous Douglas DC-3. Featuring a more modern design with cabin pressurization, the 240 series made some inr ...
, which was slightly larger and could accommodate between 44 and 52 passengers, of which 311 were produced. The firm also commenced work on the Convair 37, a relatively large double-deck airliner that would have served trans
continent A continent is any of several large landmasses. Generally identified by convention rather than any strict criteria, up to seven geographical regions In geography, regions, otherwise referred to as zones, lands or territories, are areas t ...
al routes; however, the project was abandoned due to a lack of customer demand and its high development costs. Rival planes include the Martin 2-0-2 and
Martin 4-0-4 The Martin 4-0-4 was an American pressurized passenger airliner built by the Glenn L. Martin Company. In addition to airline use initially in the United States, it was used by the United States Coast Guard and United States Navy as the RM-1G ( ...
, but the 2-0-2 had safety concerns and was unpressurized, while the 4-0-4 only sold around 100 units.Jarrett, Phillip. eds. Modern Air Transport: Worldwide Air Transport from 1945 to the Present. London: Putnam, 2000. During the postwar years, engines became much larger and more powerful, and safety features such as deicing, navigation, and weather information were added to the planes. American planes were allegedly more comfortable and had superior flight decks than those produced in Europe.


France

In 1936, the French Air Ministry requested transatlantic flying boats that could hold at least 40 passengers, leading to three Latécoère 631s introduced by
Air France Air France (; formally ''Société Air France, S.A.''), stylised as AIRFRANCE, is the flag carrier of France headquartered in Tremblay-en-France. It is a subsidiary of the Air France–KLM Group and a founding member of the SkyTeam global a ...
in July 1947. However, two crashed and the third was removed from service over safety concerns. The SNCASE Languedoc was the first French post-war airliner. Accommodating up to 44 seats, 40 aircraft were completed for Air France between October 1945 and April 1948. Air France withdrew the last Languedoc from its domestic routes in 1954, being replaced by later designs. First flying in February 1949, the four-engined
Breguet Deux-Ponts Breguet or Bréguet may refer to: * Breguet (watch), watch manufacturer **Abraham-Louis Breguet (1747–1823), Swiss watchmaker **Louis-François-Clement Breguet (1804–1883), French physicist, watchmaker, electrical and telegraph work * Bréguet ...
was a double-decker transport for passengers and cargo. Air France used it on its busiest routes, including from
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), ma ...
to the Mediterranean area and to
London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...
. The
Sud-Aviation Caravelle The Sud Aviation SE 210 Caravelle is a French jet airliner produced by Sud Aviation. It was developed by SNCASE in the early 1950s and made its maiden flight on 27 May 1955. It included some de Havilland designs and components developed for th ...
was developed during the late 1950s as the first short range jet airliner. The nose and cockpit layout were licensed from the
de Havilland Comet The de Havilland DH.106 Comet was the world's first commercial jet airliner. Developed and manufactured by de Havilland in the United Kingdom, the Comet 1 prototype first flew in 1949. It featured an aerodynamically clean design with four ...
, along with some fuselage elements. Entering service in mid 1959, 172 Caravelles had been sold within four years and six versions were in production by 1963. Sud Aviation then focused its design team on a Caravelle successor. The Super-Caravelle was a
supersonic transport A supersonic transport (SST) or a supersonic airliner is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound. To date, the only SSTs to see regular service have been Concorde and the Tupol ...
project of similar size and range to the Caravelle. It was merged with the similar Bristol Aeroplane Company project into the Anglo-French
Concorde The Aérospatiale/BAC Concorde () is a retired Franco-British supersonic airliner jointly developed and manufactured by Sud Aviation (later Aérospatiale) and the British Aircraft Corporation (BAC). Studies started in 1954, and France an ...
. The Concorde entered service in January 1967 as the second and last commercial
supersonic transport A supersonic transport (SST) or a supersonic airliner is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound. To date, the only SSTs to see regular service have been Concorde and the Tupol ...
,Gordon and Rigmant 2005, after large overruns and delays, costing £1.3 billion. All subsequent French airliner efforts were part of the
Airbus Airbus SE (; ; ; ) is a European multinational aerospace corporation. Airbus designs, manufactures and sells civil and military aerospace products worldwide and manufactures aircraft throughout the world. The company has three divisions: ' ...
pan-European initiative.


USSR

Soon after the war, most of the Soviet fleet of airliners consisted of DC-3s or
Lisunov Li-2 The Lisunov Li-2 (NATO reporting name: Cab), originally designated PS-84, was a license-built Soviet-version of the Douglas DC-3. It was produced by Factory #84 in Moscow-Khimki and, after evacuation in 1941, at TAPO in Tashkent. The pro ...
s. These planes were in desperate need of replacement, and in 1946, the
Ilyushin Il-12 The Ilyushin Il-12 (NATO reporting name: Coach) was a Soviet twin-engine cargo aircraft, developed in the mid-1940s for small and medium-haul airline routes and as a military transport. Design and development The Il-12 was developed as a priva ...
made its first flight. The Il-12 was very similar in design to American Convair 240, except was unpressurized. In 1953, the
Ilyushin Il-14 The Ilyushin Il-14 (NATO reporting name: Crate) was a Soviet twin-engine commercial and military personnel and cargo transport aircraft that first flew in 1950 in aviation, 1950, and entered service in 1954. The Il-14 was also manufactured in Eas ...
made its first flight, and this version was equipped with much more powerful engines. The main contribution that the Soviets made in regards to airliners was the Antonov An-2. This plane is a biplane, unlike most of the other airliners, and sold more units than any other transport plane.


Types


Narrow-body airliners

The most common airliners are the
narrow-body aircraft A narrow-body aircraft or single-aisle aircraft is an airliner arranged along a single aisle, permitting up to 6-abreast seating in a cabin less than in width. In contrast, a wide-body aircraft is a larger airliner usually configured with m ...
, or single-aisles. The earliest
jet airliner A jet airliner or jetliner is an airliner powered by jet engines (passenger jet aircraft). Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today. Airliners are commonly clas ...
were narrowbodies: the initial
de Havilland Comet The de Havilland DH.106 Comet was the world's first commercial jet airliner. Developed and manufactured by de Havilland in the United Kingdom, the Comet 1 prototype first flew in 1949. It featured an aerodynamically clean design with four ...
, the Boeing 707 and its competitor the
Douglas DC-8 The Douglas DC-8 (sometimes McDonnell Douglas DC-8) is a long-range narrow-body airliner built by the American Douglas Aircraft Company. After losing the May 1954 US Air Force tanker competition to the Boeing KC-135, Douglas announced in July ...
. They were followed by smaller models : the
Douglas DC-9 The McDonnell Douglas DC-9 is an American five-abreast single-aisle aircraft designed by the Douglas Aircraft Company. It was initially produced by the developer company as the Douglas DC-9 until August 1967 and then by McDonnell Douglas. After ...
and its MD-80/
MD-90 The McDonnell Douglas (later Boeing) MD-90 is an American five-abreast single-aisle airliner developed by McDonnell Douglas from its successful model MD-80. The airliner was produced by the developer company until 1997 and then by Boeing Comme ...
/
Boeing 717 The Boeing 717 is an American five-abreast single-aisle airliner produced by Boeing Commercial Airplanes. The twin-engine airliner was developed for the 100-seat market and originally marketed by McDonnell Douglas as the MD-95. It was a shor ...
derivatives; the
Boeing 727 The Boeing 727 is an American narrow-body airliner that was developed and produced by Boeing Commercial Airplanes. After the heavy 707 quad-jet was introduced in 1958, Boeing addressed the demand for shorter flight lengths from smaller airpo ...
, 737 and
757 757 may refer to: * Boeing 757: a narrow-body airliner * AD 757: a year * 757 BC: a year * 757 (number): a number * Area code 757 Image:Area code 757.png, The area colored red indicates the southeast corner of Virginia served by area code 757 po ...
using the 707 cabin cross-section; or the
Tupolev Tu-154 The Tupolev Tu-154 (russian: Tyполев Ту-154; NATO reporting name: "Careless") is a three-engined, medium-range, narrow-body airliner designed in the mid-1960s and manufactured by Tupolev. A workhorse of Soviet and (subsequently) Russian ...
, Ilyushin IL-18, and the Ilyushin IL-62. Currently produced narrow-body airliners include the
Airbus A220 The Airbus A220 is a family of five-abreast narrow-body airliners by Airbus Canada Limited Partnership. It was originally designed by Bombardier and had two years in service as the Bombardier CSeries. The program was launched on 13 July ...
and
A320 family The Airbus A320 family is a series of narrow-body airliners developed and produced by Airbus. The A320 was launched in March 1984, first flew on 22 February 1987, and was introduced in April 1988 by Air France. The first member of the fami ...
,
Boeing 737 The Boeing 737 is a narrow-body aircraft produced by Boeing at its Boeing Renton Factory, Renton Factory in Washington (state), Washington. Developed to supplement the Boeing 727 on short and thin routes, the twinjet retains the Boeing 707, 7 ...
and Embraer E-Jet family, generally used for medium-haul flights with 100 to 240 passengers. They could be joined by the in-development Comac C919 and
Irkut MC-21 The Irkut MC-21 (russian: Иркут МС-21) is a single-aisle airliner, developed in Russia by the Yakovlev Design Bureau and produced by its parent Irkut, a branch of the United Aircraft Corporation (UAC), itself a 92%-owned subsidiary o ...
.


Wide-body airliners

The larger
wide-body aircraft A wide-body aircraft, also known as a twin-aisle aircraft, is an airliner with a fuselage wide enough to accommodate two passenger aisles with seven or more seats abreast. The typical fuselage diameter is . In the typical wide-body economy cabi ...
, or twin-aisle as they have two separate aisles in the cabin, are used for long-haul flights. The first was the Boeing 747 quadjet, followed by the trijets: the
Lockheed L-1011 The Lockheed L-1011 TriStar, also known as the L-1011 (pronounced "El-ten-eleven") and TriStar, is an American medium-to-long-range, wide-body trijet airliner built by the Lockheed Corporation. It was the third wide-body airliner to enter comme ...
and the
Douglas DC-10 The McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas. The DC-10 was intended to succeed the DC-8 for long- range flights. It first flew on August 29, 1970; it was introduced on August 5, 197 ...
, then its
MD-11 The McDonnell Douglas MD-11 is an American tri-jet wide-body airliner manufactured by American McDonnell Douglas (MDC) and later by Boeing. Following DC-10 development studies, the MD-11 program was launched on December 30, 1986. Assembly of t ...
stretch. Then other quadjets were introduced: the
Ilyushin Il-86 The Ilyushin Il-86 (russian: Илью́шин Ил-86; NATO reporting name: Camber) is a short- to medium- range wide-body jet airliner that served as the USSR's first wide-bodied aircraft. Designed and tested by the Ilyushin design bureau in ...
and Il-96, the
Airbus A340 The Airbus A340 is a long-range, wide-body passenger airliner that was developed and produced by Airbus. In the mid-1970s, Airbus conceived several derivatives of the A300, its first airliner, and developed the A340 quadjet in parallel wit ...
and the double-deck A380. Twinjets were also put into service: the
Airbus A300 The Airbus A300 is a wide-body airliner developed and manufactured by Airbus. In September 1967, aircraft manufacturers in the United Kingdom, France, and West Germany signed a memorandum of understanding to develop a large airliner. West ...
/ A310,
A330 The Airbus A330 is a wide-body aircraft developed and produced by Airbus. Airbus conceived several derivatives of the A300, its first airliner in the mid-1970s. Then the company began development on the A330 twinjet in parallel with the A340 ...
and A350; the 767, 777 and
787 787 may refer to: * Boeing 787 Dreamliner, a jet airliner * AD 787, a year * 787 BC, a year * Mazda 787/787B, a Japanese rotary-engine race car which won the 1991 Le Mans Race * Porsche 787, a race car from the 1960s * 787 series, a train model o ...
.


Regional aircraft

Regional airliner A regional airliner or a feederliner is a small airliner that is designed to fly up to 100 passengers on short-haul flights, usually feeding larger carriers' airline hubs from small markets. This class of airliners is typically flown by the r ...
s seat fewer than 100 passengers. These smaller aircraft are often used to feed traffic at large
airline hub An airline hub or hub airport is an airport used by one or more airlines to concentrate passenger traffic and flight operations. Hubs serve as transfer (or stop-over) points to help get passengers to their final destination. It is part of the ...
s to larger aircraft operated by the major mainline carriers, legacy carriers, or
flag carrier A flag carrier is a transport company, such as an airline or shipping company, that, being locally registered in a given sovereign state, enjoys preferential rights or privileges accorded by the government for international operations. Hi ...
s; often sharing the same livery.
Regional jet A regional jet (RJ) is a jet-powered regional airliner with fewer than 100 seats. The first one was the Sud-Aviation Caravelle in 1959, followed by the widespread Yakovlev Yak-40, Fokker F-28, and BAe 146. The 1990s saw the emergence of ...
s include the
Bombardier CRJ100/200 The Bombardier CRJ100 and CRJ200 (previously Canadair CRJ100 and CRJ200) is a regional jet designed and manufactured by Bombardier Aerospace between 1991 and 2006, the first of the Bombardier CRJ family. The ''Canadair Regional Jet'' (CRJ) p ...
and Bombardier CRJ700 series, or the
Embraer ERJ family The Embraer ERJ family (for Embraer Regional Jet, model names EMB-135, EMB-140 and EMB-145) are regional jets designed and produced by the Brazilian aerospace company Embraer. The family includes the ERJ135 (37 passengers), ERJ140 (44 passenger ...
. Currently produced
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
regional airliners include the Dash-8 series, and the ATR 42/ 72.


Commuter aircraft

Light aircraft A light aircraft is an aircraft that has a maximum gross takeoff weight of or less.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 308. Aviation Supplies & Academics, 1997. Light aircraft are used as utility aircraft co ...
can be used as small commuter airliners, or as
air taxi An air taxi is a small commercial aircraft that makes short flights on demand. In 2001 air taxi operations were promoted in the United States by a NASA and aerospace industry study on the potential Small Aircraft Transportation System (SATS) ...
s. Twin turboprops carrying up to 19 passengers include the Beechcraft 1900,
Fairchild Metro The Fairchild Swearingen Metroliner (previously the Swearingen Metro and later Fairchild Aerospace Metro) is a 19-seat, pressurized, twin-turboprop airliner first produced by Swearingen Aircraft and later by Fairchild Aircraft at a plant in S ...
,
Jetstream 31 The British Aerospace Jetstream is a small twin-turboprop airliner, with a pressurised fuselage, developed as the ''Jetstream 31'' from the earlier Handley Page Jetstream. A larger version of the Jetstream was also manufactured, the British ...
,
DHC-6 Twin Otter The de Havilland Canada DHC-6 Twin Otter is a Canadian STOL (Short Takeoff and Landing) utility aircraft developed by de Havilland Canada, which produced the aircraft from 1965 to 1988; Viking Air purchased the type certificate, then restarted ...
and
Embraer EMB 110 Bandeirante The Embraer EMB 110 Bandeirante (English: ''pioneer'') is a Brazilian general purpose 15–21 passenger twin-turboprop light transport aircraft designed by Embraer for military and civil use. The EMB 110 was designed by the French engineer Max ...
. Smaller airliners include the single-engined turboprops like the
Cessna Caravan The Cessna 208 Caravan is a utility aircraft produced by Cessna. The project was commenced on November 20, 1981, and the prototype first flew on December 9, 1982. The production model was certified by the FAA in October 1984 and its Cargoma ...
and Pilatus PC-12; or twin piston-powered aircraft made by Cessna,
Piper Piper may refer to: People * Piper (given name) * Piper (surname) Arts and entertainment Fictional characters Comics * Piper (Morlock), in the Marvel Universe * Piper (Mutate), in the Marvel Universe Television * Piper Chapman, lea ...
, Britten-Norman, and
Beechcraft Beechcraft is an American brand of civil aviation and military aircraft owned by Textron Aviation since 2014, headquartered in Wichita, Kansas. Originally, it was a brand of Beech Aircraft Corporation, an American manufacturer of general avi ...
. They often lack lavatories, stand-up cabins, pressurization,
galleys A galley is a type of ship that is propelled mainly by oars. The galley is characterized by its long, slender hull, shallow draft, and low freeboard (clearance between sea and gunwale). Virtually all types of galleys had sails that could be use ...
, overhead storage bins, reclining seats, or a flight attendant.


Engines

Until the beginning of the
Jet Age The Jet Age is a period in the history of aviation defined by the advent of aircraft powered by jet turbine engines, and by the social change this brought about. Jet airliners were able to fly much higher, faster, and farther than older pisto ...
, piston engines were common on
propliner A propliner is a large, propeller-driven airliner. Typically, the term is used for piston engine airliners that flew before the large scale advent of airliners of the jet age. With the notable exception of the de Havilland Albatross and Fokker F ...
s such as the Douglas DC-3. Nearly all modern airliners are now powered by
turbine A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating ...
engines, either
turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanic ...
s or
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
s. Gas turbine engines operate efficiently at much higher altitudes, are more reliable than piston engines, and produce less vibration and noise. The use of a common fuel type – kerosene-based jet fuel – is another advantage.


Airliner variants

Some variants of airliners have been developed for carrying freight or for luxury corporate use. Many airliners have also been modified for government use as
VIP A very important person or personage (VIP or V.I.P.) is a person who is accorded special privileges due to their high social status, influence or importance. The term was not common until sometime after World War 2 by RAF pilots. Examples inc ...
transports and for military functions such as airborne tankers (for example, the
Vickers VC10 The Vickers VC10 is a mid-sized, narrow-body long-range British jet airliner designed and built by Vickers-Armstrongs (Aircraft) Ltd and first flown at Brooklands, Surrey, in 1962. The airliner was designed to operate on long-distance route ...
,
Lockheed L-1011 The Lockheed L-1011 TriStar, also known as the L-1011 (pronounced "El-ten-eleven") and TriStar, is an American medium-to-long-range, wide-body trijet airliner built by the Lockheed Corporation. It was the third wide-body airliner to enter comme ...
, Boeing 707), air ambulance (
USAF The United States Air Force (USAF) is the Aerial warfare, air military branch, service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part ...
/ USN
McDonnell Douglas DC-9 The McDonnell Douglas DC-9 is an American five-abreast single-aisle aircraft designed by the Douglas Aircraft Company. It was initially produced by the developer company as the Douglas DC-9 until August 1967 and then by McDonnell Douglas. Afte ...
),
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmisher ...
(
Embraer ERJ 145 The Embraer ERJ family (for Embraer Regional Jet, model names EMB-135, EMB-140 and EMB-145) are regional jets designed and produced by the Brazilian aerospace company Embraer. The family includes the ERJ135 (37 passengers), ERJ140 (44 passenger ...
,
Saab 340 The Saab 340 is a Swedish twin-engine turboprop aircraft designed and initially produced by Saab AB and Fairchild Aircraft. It is designed to seat 30-36 passengers and, as of July 2018, there were 240 operational aircraft used by 34 different o ...
, and
Boeing 737 The Boeing 737 is a narrow-body aircraft produced by Boeing at its Boeing Renton Factory, Renton Factory in Washington (state), Washington. Developed to supplement the Boeing 727 on short and thin routes, the twinjet retains the Boeing 707, 7 ...
), as well as for troop-carrying roles.


Configuration

Modern jetliners are usually low-wing designs with two engines mounted underneath the swept wings, while (
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
aircraft are slow enough to use straight wings. Smaller airliners sometimes have their engines mounted on either side of the rear fuselage. Numerous advantages and disadvantages exist due to this arrangement. Perhaps the most important advantage to mounting the engines under the wings is that the total aircraft weight is more evenly distributed across the wingspan, which imposes less
bending moment In solid mechanics, a bending moment is the reaction induced in a structural element when an external force or moment is applied to the element, causing the element to bend. The most common or simplest structural element subjected to bending mo ...
on the wings and allows for a lighter wing structure. This factor becomes more important as aircraft weight increases, and no in-production airliners have both a maximum takeoff weight more than 50 tons and engines mounted on the fuselage. The Antonov An-148 is the only in-production jetliner with high-mounted wings (usually seen in
military transport aircraft A military transport aircraft, military cargo aircraft or airlifter is a military-owned transport aircraft used to support military operations by airlifting troops and military equipment. Transport aircraft are crucial to maintaining supply ...
), which reduces the risk of damage from unpaved runways. Except for a few experimental or military designs, all aircraft built to date have had all of their weight lifted off the ground by airflow across the wings. In terms of
aerodynamics Aerodynamics, from grc, ἀήρ ''aero'' (air) + grc, δυναμική (dynamics), is the study of the motion of air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dy ...
, the fuselage has been a mere burden.
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the US federal government responsible for the civil List of government space agencies, space program ...
and
Boeing The Boeing Company () is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, telecommunications equipment, and missiles worldwide. The company also provides leasing and p ...
are currently developing a
blended wing body A blended wing body (BWB), also known as blended body or hybrid wing body (HWB), is a fixed-wing aircraft having no clear dividing line between the wings and the main body of the craft. The aircraft has distinct wing and body structures, which ar ...
design in which the entire airframe, from wingtip to wingtip, contributes lift. This promises a significant gain in fuel efficiency.


Current manufacturers

The major manufacturers with
large aircraft Large aircraft allow the transportation of large and/or heavy payloads over long distances. Making an aircraft design larger can also improve the overall fuel efficiency and man-hours for transporting a given load, while a greater space is availa ...
airliners currently in production include: *
Airbus Airbus SE (; ; ; ) is a European multinational aerospace corporation. Airbus designs, manufactures and sells civil and military aerospace products worldwide and manufactures aircraft throughout the world. The company has three divisions: ' ...
(France/Germany/Spain/United Kingdom) *
Antonov Antonov State Enterprise ( uk, Державне підприємство «Антонов»), formerly the Aeronautical Scientific-Technical Complex named after Antonov (Antonov ASTC) ( uk, Авіаційний науково-технічни� ...
(Ukraine) *
ATR Aircraft ATR (French: Avions de transport régional; Italian: Aerei da Trasporto Regionale; or "Regional Transport Airplanes" in English) is a Franco- Italian aircraft manufacturer headquartered in Blagnac, France, a suburb of Toulouse. It was form ...
(France/Italy) *
Boeing The Boeing Company () is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, telecommunications equipment, and missiles worldwide. The company also provides leasing and p ...
(United States) *
Comac , type = State-owned limited company , industry = Aviation , founded = , founder = , location_city = Pudong, Shanghai , location_country = China , area_served = Worldwide , products = Commercial airliners , services = , key_people ...
(China) * Embraer (Brazil) *
Irkut Corporation The JSC Irkut Corporation () (russian: Иркут) is a Russian aircraft manufacturer, headquartered in the Aeroport District, Northern Administrative Okrug, Moscow, and is best known as being the manufacturer of the Sukhoi Su-30 family of inter ...
( UAC, Russia, includes
Sukhoi The JSC Sukhoi Company (russian: ПАО «Компания „Сухой“», ) is a Russian aircraft manufacturer (formerly Soviet), headquartered in Begovoy District, Northern Administrative Okrug, Moscow, that designs both civilian and mili ...
) *
Xi'an Aircraft Industrial Corporation Xi'an Aircraft Industrial Corporation, also known as Xi'an Aircraft Company Limited (XAC), is a Chinese aircraft manufacturer and developer of large and medium-sized airplanes. It is based in Yanliang District, Xi'an, Shaanxi Province, adja ...
(China) The narrow-body and wide-body airliner market is dominated by Airbus and Boeing, and the
regional airliner A regional airliner or a feederliner is a small airliner that is designed to fly up to 100 passengers on short-haul flights, usually feeding larger carriers' airline hubs from small markets. This class of airliners is typically flown by the r ...
market is shared between
ATR Aircraft ATR (French: Avions de transport régional; Italian: Aerei da Trasporto Regionale; or "Regional Transport Airplanes" in English) is a Franco- Italian aircraft manufacturer headquartered in Blagnac, France, a suburb of Toulouse. It was form ...
and Embraer. Setting up a reliable
customer support Customer support is a range of services to assist customers in making cost effective and correct use of a product. It includes assistance in planning, installation, training, troubleshooting, maintenance, upgrading, and disposal of a product. Reg ...
network, ensuring uptime, availability and support 24/7 and anywhere, is critical for the success of airliner manufacturers.
Boeing and Airbus The competition between Airbus and Boeing has been characterized as a duopoly in the large jet airliner market since the 1990s. This resulted from a series of mergers within the global aerospace industry, with Airbus beginning as a pan-Europe ...
are ranked 1 and 2 in customer satisfaction for aftermarket support by a survey by Inside MRO and
Air Transport World ''Air Transport World'' (''ATW'') is an online and print trade publication covering the global air transportation industry. It is owned by Informa and is a sister publication to '' Aviation Week'', the ''Aviation Daily'' and ''MRO Digest'', whic ...
, and this is a reason why
Mitsubishi Aircraft Corporation , abbreviated MITAC, is a Japanese company that develops, produces, sells and supports the Mitsubishi SpaceJet (formerly MRJ) passenger airliners. The manufacturing of the aircraft is carried out by parent company Mitsubishi Heavy Industries (MHI ...
purchased the
Bombardier CRJ The Bombardier CRJ or CRJ Series (for Canadair Regional Jet) is a family of regional jets introduced in 1991 by Bombardier Aerospace. The CRJ was formerly manufactured by Bombardier Aerospace with the manufacturing of the first CRJ generation, ...
program. It is an entry barrier for new entrants like the
Xian MA700 The Xian MA700 (MA for 新舟, "Modern Ark") is a twin-engine, medium-range turboprop airliner currently under development by Xi'an Aircraft Industrial Corporation of the Aviation Industry Corporation of China (AVIC). Development When the air ...
and Comac C919, with no credible previous experience with the
MA60 The Xian MA60 (新舟60, ''Xīnzhōu liùshí'', "Modern Ark 60") is a turboprop-powered airliner produced by China's Xi'an Aircraft Industrial Corporation under the Aviation Industry Corporation of China (AVIC). The MA60 is a stretched versio ...
, or the
Irkut MC-21 The Irkut MC-21 (russian: Иркут МС-21) is a single-aisle airliner, developed in Russia by the Yakovlev Design Bureau and produced by its parent Irkut, a branch of the United Aircraft Corporation (UAC), itself a 92%-owned subsidiary o ...
after the
Sukhoi Superjet 100 The Sukhoi Superjet 100 () or SSJ100 is a regional jet designed by Russian aircraft company Sukhoi Civil Aircraft, a division of the United Aircraft Corporation (now: Regional Aircraft – Branch of the Irkut Corporation). With development start ...
.


Notable airliners

*
Boeing 247 The Boeing Model 247 is an early United States airliner, and one of the first such aircraft to incorporate advances such as all-metal ( anodized aluminum) semimonocoque construction, a fully cantilevered wing, and retractable landing gear.
– the first modern airliner, with all-metal construction and
retractable landing gear Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin ...
* Douglas DC-3 – very widespread, still serving *
Boeing 307 Stratoliner The Boeing Model 307 Stratoliner (or Strato-Clipper in Pan American service, or C-75 in USAAF service) is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered co ...
– the first with a
pressurized cabin Cabin pressurization is a process in which conditioned air is pumped into the cabin of an aircraft or spacecraft in order to create a safe and comfortable environment for passengers and crew flying at high altitudes. For aircraft, this air is u ...
*
Douglas DC-6 The Douglas DC-6 is a piston-powered airliner and cargo aircraft built by the Douglas Aircraft Company from 1946 to 1958. Originally intended as a military transport near the end of World War II, it was reworked after the war to compete with t ...
– derived from the
Douglas DC-4 The Douglas DC-4 is an American four-engined (piston), propeller-driven airliner developed by the Douglas Aircraft Company. Military versions of the plane, the C-54 and R5D, served during World War II, in the Berlin Airlift and into the 1 ...
*
Boeing 377 The Boeing 377 Stratocruiser was a large long-range airliner developed from the C-97 Stratofreighter military transport, itself a derivative of the B-29 Superfortress. The Stratocruiser's first flight was on July 8, 1947. Its design was advanced ...
- developed from the
C-97 Stratofreighter The Boeing C-97 Stratofreighter was a long-range heavy military cargo aircraft developed from the B-29 and B-50 bombers. Design work began in 1942, the first of three prototype XC-97s flew on 9 November 1944 (none saw combat), and the first of s ...
*
Vickers Viscount The Vickers Viscount is a British medium-range turboprop airliner first flown in 1948 by Vickers-Armstrongs. A design requirement from the Brabazon Committee, it entered service in 1953 and was the first turboprop-powered airliner. The Vi ...
– the first
turboprop A turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. Air enters the intake and is compressed by the compressor. ...
airliner *
Lockheed Constellation The Lockheed Constellation ("Connie") is a propeller-driven, four-engined airliner built by Lockheed Corporation starting in 1943. The Constellation series was the first pressurized-cabin civil airliner series to go into widespread use. Its press ...
– one of the largest propeller-driven airliners * Antonov An-2 – a single engine biplane, a widespread large
utility aircraft A utility aircraft is a general-purpose light airplane or helicopter, usually used for transporting people, freight or other supplies, but is also used for other duties when more specialized aircraft are not required or available. The term can a ...


Notable jetliners

*
De Havilland Comet The de Havilland DH.106 Comet was the world's first commercial jet airliner. Developed and manufactured by de Havilland in the United Kingdom, the Comet 1 prototype first flew in 1949. It featured an aerodynamically clean design with four ...
– the first operational
jetliner A jet airliner or jetliner is an airliner powered by jet engines (passenger jet aircraft). Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today. Airliners are commonly clas ...
, grounded by early crashes * Tupolev Tu-104 – the first
twinjet A twinjet or twin-engine jet is a jet aircraft powered by two engines. A twinjet is able to fly well enough to land with a single working engine, making it safer than a single-engine aircraft in the event of failure of an engine. Fuel efficien ...
, developed into the first
turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanic ...
-powered airliner, the Tupolev Tu-124 * Boeing 707 – the most successful early jetliner, along the less widespread
Douglas DC-8 The Douglas DC-8 (sometimes McDonnell Douglas DC-8) is a long-range narrow-body airliner built by the American Douglas Aircraft Company. After losing the May 1954 US Air Force tanker competition to the Boeing KC-135, Douglas announced in July ...
* Sud Aviation Caravelle – the first jetliner with rear
podded engine A podded engine is a jet engine that has been built up and integrated in its nacelle. This may be done in a podding facility as part of an aircraft assembly process. The nacelle contains the engine, engine mounts and parts which are required to r ...
s, the configuration of the more widespread
Douglas DC-9 The McDonnell Douglas DC-9 is an American five-abreast single-aisle aircraft designed by the Douglas Aircraft Company. It was initially produced by the developer company as the Douglas DC-9 until August 1967 and then by McDonnell Douglas. After ...
*
Boeing 737 The Boeing 737 is a narrow-body aircraft produced by Boeing at its Boeing Renton Factory, Renton Factory in Washington (state), Washington. Developed to supplement the Boeing 727 on short and thin routes, the twinjet retains the Boeing 707, 7 ...
– the most successful jet airliner by deliveries *
Tupolev Tu-144 The Tupolev Tu-144 (russian: Tyполев Ту-144; NATO reporting name: Charger) is a Soviet supersonic passenger airliner designed by Tupolev in operation from 1968 to 1999. The Tu-144 was the world's first commercial supersonic transport ai ...
– the first operational
supersonic transport A supersonic transport (SST) or a supersonic airliner is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound. To date, the only SSTs to see regular service have been Concorde and the Tupol ...
*
Concorde The Aérospatiale/BAC Concorde () is a retired Franco-British supersonic airliner jointly developed and manufactured by Sud Aviation (later Aérospatiale) and the British Aircraft Corporation (BAC). Studies started in 1954, and France an ...
– the most successful supersonic airliner, operating until 2003 * Boeing 747 – the first
wide-body aircraft A wide-body aircraft, also known as a twin-aisle aircraft, is an airliner with a fuselage wide enough to accommodate two passenger aisles with seven or more seats abreast. The typical fuselage diameter is . In the typical wide-body economy cabi ...
and first
high-bypass turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanica ...
-powered airliner, the largest passenger airliner until the A380 *
McDonnell Douglas DC-10 The McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas. The DC-10 was intended to succeed the DC-8 for long- range flights. It first flew on August 29, 1970; it was introduced on August 5, 197 ...
– the first
trijet A trijet is a jet aircraft powered by three jet engines. In general, passenger airline trijets are considered to be second-generation jet airliners, due to their innovative engine locations, in addition to the advancement of turbofan technolo ...
wide-body, along the later Lockheed L-1011 TriStar *
Airbus A300 The Airbus A300 is a wide-body airliner developed and manufactured by Airbus. In September 1967, aircraft manufacturers in the United Kingdom, France, and West Germany signed a memorandum of understanding to develop a large airliner. West ...
– the first
twinjet A twinjet or twin-engine jet is a jet aircraft powered by two engines. A twinjet is able to fly well enough to land with a single working engine, making it safer than a single-engine aircraft in the event of failure of an engine. Fuel efficien ...
wide-body, followed by the Boeing 767 *
Airbus A320 The Airbus A320 family is a series of narrow-body airliners developed and produced by Airbus. The A320 was launched in March 1984, first flew on 22 February 1987, and was introduced in April 1988 by Air France. The first member of the famil ...
– the first airliner with
fly-by-wire Fly-by-wire (FBW) is a system that replaces the conventional manual flight controls of an aircraft with an electronic interface. The movements of flight controls are converted to electronic signals transmitted by wires, and flight control ...
flight controls, the most ordered jet airliner *
Boeing 777 The Boeing 777, commonly referred to as the Triple Seven, is an American long-range wide-body airliner developed and manufactured by Boeing Commercial Airplanes. It is the world's largest twinjet. The 777 was designed to bridge the gap betw ...
– the largest twinjet *
Airbus A380 The Airbus A380 is a large wide-body airliner that was developed and produced by Airbus. It is the world's largest passenger airliner and only full-length double-deck jet airliner. Airbus studies started in 1988, and the project was annou ...
– full double-deck aircraft, the largest passenger airliner *
Boeing 787 The Boeing 787 Dreamliner is an American wide-body jet airliner developed and manufactured by Boeing Commercial Airplanes. After dropping its unconventional Sonic Cruiser project, Boeing announced the conventional 7E7 on January 29, 2003, ...
– the first airliner mostly constructed with
composite materials A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or ...


In production aircraft


Fleet

The airliner fleet went from 13,500 in 2000 to 25,700 in 2017: 16% to 30.7% in Asia/Pacific (2,158 to 7,915), 34.7% to 23.6% in USA (4,686 to 6,069) and 24% to 20.5% in Europe (3,234 to 5,272). In 2018, there were 29,398 airliners in service: 26,935 passenger transports and 2,463 freighters, while 2,754 others were stored. The largest fleet was in Asia-Pacific with 8,808 (5% stored), followed by 8,572 in North America (10% stored), 7,254 in Europe (9% stored), 2,027 in Latin America, 1,510 in Middle East and 1,347 in Africa. Narrowbody are dominant with 16,235, followed by 5,581 Widebodies, 3,743 Turboprops, 3,565 Regional jets and 399 Others. By the end of 2018, there were 1,826 parked or in storage jetliners out of 29,824 in service (6.1%): 1,434 narrowbodies and 392 widebodies, down from 9.8% of the fleet at the end of 2012 and 11.3% at the end of 2001.


Market

Since it began, the
jet airliner A jet airliner or jetliner is an airliner powered by jet engines (passenger jet aircraft). Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today. Airliners are commonly clas ...
market had a recurring pattern of seven years of growth followed by three years of deliveries falling 30–40%, except a steady growth from 2004 due to the economic rise of China going from 3% of world market in 2001 to 22% in 2015, expensive jet fuel till 2014 stimulating old jets replacement allowed by low
interest rate An interest rate is the amount of interest due per period, as a proportion of the amount lent, deposited, or borrowed (called the principal sum). The total interest on an amount lent or borrowed depends on the principal sum, the interest rate, ...
s since 2008, and strong
airline An airline is a company that provides air transport services for traveling passengers and freight. Airlines use aircraft to supply these services and may form partnerships or alliances with other airlines for codeshare agreements, in wh ...
passenger demand since. In 2004, 718 Airbus and Boeings were delivered, worth $39.3 billion; 1,466 are expected in 2017, worth $104.4 billion: a growth by 3.5 from 2004 to 2020 is unprecedented and highly unusual for any mature market. In 2016, the deliveries went for 38% in Asia-Pacific, 25% in Europe, 22% in North America, 7% in Middle East, 6% in South America and 2% in Africa. 1,020 narrowbodies were delivered and their backlog reach : 4,991 A320neo, A320ceo; 3,593 737 Max, 835 737NG, 348 CSeries, 305 C919 and 175 MC-21; while 398 widebodies were delivered : 137 Dreamliners and 99 B777 for Boeing (65%) against 63 A330 and 49 A350 for Airbus, more than 2,400 widebodies were in backlog, led by the A350 with 753 (31%) then the Boeing 787 with 694 (28%). The most important driver of orders is airline
profitability In economics, profit is the difference between the revenue that an economic entity has received from its outputs and the total cost of its inputs. It is equal to total revenue minus total cost, including both explicit and implicit costs. It i ...
, itself driven mainly by world
GDP growth Economic growth can be defined as the increase or improvement in the inflation-adjusted market value of the goods and services produced by an economy in a financial year. Statisticians conventionally measure such growth as the percent rate of ...
but also supply and demand balance and
oil price The price of oil, or the oil price, generally refers to the spot price of a barrel () of benchmark crude oil—a reference price for buyers and sellers of crude oil such as West Texas Intermediate (WTI), Brent Crude, Dubai Crude, OPEC Ref ...
s, while new programmes by
Airbus and Boeing The competition between Airbus and Boeing has been characterized as a duopoly in the large jet airliner market since the 1990s. This resulted from a series of mergers within the global aerospace industry, with Airbus beginning as a pan-Europea ...
help to stimulate aircraft demand. In 2016, 38% of the 25 years old airliners had been retired, 50% of the 28 years old : there will be 523 aircraft reaching 25 years old in 2017, 1,127 in 2026 and 1,628 in 2041. Deliveries rose by 80% from 2004 to 2016, they represented 4.9% of the fleet in 2004 and 5.9% in 2016, down from 8% previously. Oil prices and
airshow An air show (or airshow, air fair, air tattoo) is a public event where aircraft are exhibited. They often include aerobatics demonstrations, without they are called "static air shows" with aircraft parked on the ground. The largest air show ...
orders are trending together. In 2020, deliveries were down by more than 50% compared to 2019 due to the
impact of the COVID-19 pandemic on aviation The COVID-19 pandemic has had a significant impact on the airline industry due to travel restrictions and a decimation in demand among travelers. Significant reductions in passenger numbers have resulted in flights being cancelled or planes ...
, after 10 years of growth.


Storage, scrapping and recycling

Storage can be an adjustment variable for the airliner fleet: as Jan–Apr 2018
RPK The RPK (russian: Ручной пулемёт Калашникова/РПК, Ruchnoy Pulemyot Kalashnikova, link=no, English: "Kalashnikov hand-held machine gun"), sometimes retroactively termed the RPK-47, is a Soviet 7.62×39mm light machine ...
s are up by 7% over a year and FTKs up by 5.1%, the IATA reports 81 net aircraft went back from storage (132 recalled and 51 stored) in April. It is the second month of storage contraction after eight of expansion and the largest in four years, while new aircraft deliveries fell slightly to 448 from 454 due to supply-chain issues and in-service issues grounding others. Retirements were down by 8% and utilization up by 2%, according to Canaccord Genuity, driving used aircraft and engines values up while MRO shops have unexpected demand for legacy products like the
PW4000 The Pratt & Whitney PW4000 is a family of dual-spool, axial-flow, high-bypass turbofan aircraft engines produced by Pratt & Whitney as the successor to the JT9D. It was first run in April 1984, was FAA certified in July 1986, and was introdu ...
and
GE CF6 The General Electric CF6, US military designations F103 and F138, is a family of high-bypass turbofan engines produced by GE Aviation. Based on the TF39, the first high-power high-bypass jet engine, the CF6 powers a wide variety of civilian a ...
.


Cabin configurations and features

An airliner will usually have several classes of seating: first class,
business class Business class is a travel class available on many commercial airlines and rail lines, known by brand names which vary, by airline or rail company. In the airline industry, it was originally intended as an intermediate level of service between ...
, and/or
economy class Economy class, also called third class, coach class, steerage, or to distinguish it from the slightly more expensive premium economy class, standard economy class or budget economy class, is the lowest travel class of seating in air travel, rail ...
(which may be referred to as coach class or tourist class, and sometimes has a separate "premium" economy section with more legroom and amenities). The seats in more expensive classes are wider, more comfortable, and have more amenities such as "lie flat" seats for more comfortable sleeping on long flights. Generally, the more expensive the class, the better the beverage and meal service. Domestic flights generally have a two-class configuration, usually first or business class and coach class, although many airlines instead offer all-economy seating. International flights generally have either a two-class configuration or a three-class configuration, depending on the airline, route and aircraft type. Many airliners offer movies or audio/video on demand (this is standard in first and business class on many international flights and may be available on economy). Cabins of any class are provided with
lavatory Lavatory, Lav, or Lavvy may refer to: *Toilet, the plumbing fixture *Toilet (room), containing a toilet *Public toilet *Aircraft lavatory, the public toilet on an aircraft *Latrine, a rudimentary toilet *A lavatorium, the washing facility in a mon ...
facilities, reading lights and gaspers. Larger airliners may have a segregated rest compartment reserved for crew use during breaks.


Seats

The types of seats that are provided and how much legroom is given to each passenger are decisions made by the individual airlines, not the aircraft manufacturers. Seats are mounted in "tracks" on the floor of the cabin and can be moved back and forth by the maintenance staff or removed altogether. Naturally the airline tries to maximize the number of seats available in every aircraft to carry the largest possible (and therefore most profitable) number of passengers. Passengers seated in an exit row (the row of seats adjacent to an emergency exit) usually have substantially more legroom than those seated in the remainder of the cabin, while the seats directly in front of the exit row may have less legroom and may not even recline (for evacuation safety reasons). However, passengers seated in an exit row may be required to assist cabin crew during an emergency evacuation of the aircraft opening the emergency exit and assisting fellow passengers to the exit. As a precaution, many airlines prohibit young people under the age of 15 from being seated in the exit row. The seats are designed to withstand strong forces so as not to break or come loose from their floor tracks during
turbulence In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between ...
or accidents. The backs of seats are often equipped with a fold-down tray for eating, writing, or as a place to set up a portable computer, or a music or video player. Seats without another row of seats in front of them have a tray that is either folded into the armrest or that clips into brackets on the underside of the armrests. However, seats in premium cabins generally have trays in the armrests or clip-on trays, regardless of whether there is another row of seats in front of them. Seatbacks now often feature small colour LCD screens for videos, television and video games. Controls for this display as well as an outlet to plug in audio headsets are normally found in the armrest of each seat.


Overhead bins

The overhead bins, also known as overhead lockers or pivot bins, are used for stowing carry-on baggage and other items. While the airliner manufacturer will normally specify a standard version of the product to supply, airlines can choose to have bins of differing size, shape, or color installed. Over time, overhead bins evolved out of what were originally overhead shelves that were used for little more than coat and briefcase storage. As concerns about falling debris during turbulence or in accidents increased, enclosed bins became the norm. Bins have increased in size to accommodate the larger carry-on baggage passengers can bring onto the aircraft. Newer bin designs have included a handrail, useful when moving through the cabin.


Passenger service units

Above the passenger seats are
Passenger Service Unit A passenger service unit (PSU) is an aircraft component situated above each row in the overhead panel above the passenger seats in the cabin of airliners. Among other things, a PSU contains reading lights, loudspeakers for announcements, illumina ...
s (PSU). These typically contain reading lights, air vents, and a flight attendant call light. On most narrowbody aircraft (and some
Airbus A300 The Airbus A300 is a wide-body airliner developed and manufactured by Airbus. In September 1967, aircraft manufacturers in the United Kingdom, France, and West Germany signed a memorandum of understanding to develop a large airliner. West ...
s and A310s), the flight attendant call button and the buttons to control the reading lights are located directly on the PSU, while on most widebody aircraft, the flight attendant call button and the reading light control buttons are usually part of the in-flight entertainment system. The units frequently have small "Fasten Seat Belt" and "No Smoking" illuminated signage and may also contain a speaker for the cabin public address system. On some newer aircraft, a "Turn off electronic devices" sign is used instead of the "No Smoking" sign, as smoking isn't permitted on board the aircraft anyway. The PSU will also normally contain the drop-down oxygen masks which are activated if there is a sudden drop in cabin pressure. These are supplied with oxygen by means of a
chemical oxygen generator A chemical oxygen generator is a device that releases oxygen via a chemical reaction. The oxygen source is usually an inorganic superoxide, chlorate, or perchlorate; ozonides are a promising group of oxygen sources. The generators are usually ig ...
. By using a chemical reaction rather than a connection to an oxygen tank, these devices supply breathing oxygen for long enough for the airliner to descend to thicker, more breathable air. Oxygen generators do generate considerable heat in the process. Because of this, the oxygen generators are thermally shielded and are only allowed in commercial airliners when properly installed – they are not permitted to be loaded as freight on passenger-carrying flights.
ValuJet Flight 592 ValuJet Airlines Flight 592 was a regularly scheduled flight from Miami International Airport to Hartsfield–Jackson Atlanta International Airport. On May 11, 1996, the ValuJet Airlines McDonnell Douglas DC-9 operating the route crashed into t ...
crashed on May 11, 1996, as a result of improperly loaded chemical oxygen generators.


Cabin pressurization

Airliners developed since the 1940s have had pressurized cabins (or, more accurately, pressurized hulls including baggage holds) to enable them to carry passengers safely at high altitudes where low oxygen levels and air pressure would otherwise cause sickness or death. High altitude flight enabled airliners to fly above most weather systems that cause turbulent or dangerous flying conditions, and also to fly faster and further as there is less drag due to the lower air density. Pressurization is applied using compressed air, in most cases bled from the engines, and is managed by an
environmental control system In aeronautics, an environmental control system (ECS) of an aircraft is an essential component which provides air supply, thermal control and cabin pressurization for the crew and passengers. Additional functions include the cooling of avionic ...
which draws in clean air, and vents stale air out through a valve. Pressurization presents design and construction challenges to maintain the structural integrity and sealing of the cabin and hull and to prevent rapid decompression. Some of the consequences include small round windows, doors that open inwards and are larger than the door hole, and an
emergency oxygen system Aircraft emergency oxygen systems or air masks are emergency equipment fitted to pressurized commercial aircraft, intended for use when the cabin pressurisation system has failed and the cabin altitude has climbed above a safe level. It consists ...
. To maintain a pressure in the cabin equivalent to an altitude close to sea level would, at a cruising altitude around , create a pressure difference between inside the aircraft and outside the aircraft that would require greater hull strength and weight. Most people do not suffer ill effects up to an altitude of , and maintaining cabin pressure at this equivalent altitude significantly reduces the pressure difference and therefore the required hull strength and weight. A side effect is that passengers experience some discomfort as the cabin pressure changes during ascent and descent to the majority of airports, which are at low altitudes.


Cabin climate control

The air bled from the engines is hot and requires cooling by
air conditioning Air conditioning, often abbreviated as A/C or AC, is the process of removing heat from an enclosed space to achieve a more comfortable interior environment (sometimes referred to as 'comfort cooling') and in some cases also strictly controlling ...
units. It is also extremely dry at cruising altitude, and this causes sore eyes, dry skin and mucosa on long flights. Although humidification technology could raise its
relative humidity Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity dep ...
to comfortable middle levels, this is not done since humidity promotes
corrosion Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engi ...
to the inside of the hull and risks condensation which could short electrical systems, so for safety reasons it is deliberately kept to a low value, around 10%. Another problem of the air coming from the ventilation (unto which the oil lubrication system of the engines is hooked up) is that fumes from components in the synthetic oils can sometimes travel along, causing passengers, pilots and crew to be intoxicated. The illness it causes is called
aerotoxic syndrome Aerotoxic syndrome relates to ill-health effects that are claimed to be caused by breathing contaminated airliner cabin air. This condition is not an established medical diagnosis. Potential sources of contamination Modern jetliners have envi ...
.


Baggage holds

Airliners must have space on board to store "checked" baggage – that which will not safely fit in the passenger cabin. Designed to hold baggage as well as freight, these compartments are called "cargo bins", "holds", or occasionally "pits". Occasionally baggage holds may be referred to as cargo decks on the largest of aircraft. These compartments can be accessed through doors on the outside of the aircraft. Depending on the aircraft, baggage holds are normally inside the hull and are therefore pressurized just like the passenger cabin although they may not be heated. While lighting is normally installed for use by the loading crew, typically the compartment is unlit when the door is closed. Baggage holds on modern airliners are equipped with fire detection equipment and larger aircraft have automated or remotely activated fire-fighting devices installed.


Narrow-body airliners

Most "
narrow-body A narrow-body aircraft or single-aisle aircraft is an airliner arranged along a single aisle, permitting up to 6-abreast seating in a cabin less than in width. In contrast, a wide-body aircraft is a larger airliner usually configured with mu ...
" airliners with more than 100 seats have space below the cabin floor, while smaller aircraft often have a special compartment separate from the passenger area but on the same level. Baggage is normally stacked within the bin by hand, sorted by destination category. Netting that fits across the width of the bin is secured to limit movement of the bags. Airliners often carry items of
freight Cargo consists of bulk goods conveyed by water, air, or land. In economics, freight is cargo that is transported at a freight rate for commercial gain. ''Cargo'' was originally a shipload but now covers all types of freight, including tran ...
and mail. These may be loaded separately from the baggage or mixed in if they are bound for the same destination. For securing bulky items "hold down" rings are provided to tie items into place.


Wide-body airliners

"
Wide-body A wide-body aircraft, also known as a twin-aisle aircraft, is an airliner with a fuselage wide enough to accommodate two passenger aisles with seven or more seats abreast. The typical fuselage diameter is . In the typical wide-body economy cabin ...
" airliners frequently have a compartment like the ones described above, typically called a "bulk bin". It is normally used for late arriving luggage or bags which may have been checked at the gate. However, most baggage and loose freight items are loaded into containers called
Unit Load Device A unit load device (ULD) is a container used to load luggage, freight, and mail on wide-body aircraft and specific narrow-body aircraft. It allows preloading of cargo, confidence the containerised load will fit in the aircraft and efficient plann ...
s (ULDs), often referred to as "cans". ULDs come in a variety of sizes and shapes, but the most common model is the
LD3 A unit load device (ULD) is a container used to load luggage, freight, and mail on wide-body aircraft and specific narrow-body aircraft. It allows preloading of cargo, confidence the containerised load will fit in the aircraft and efficient plann ...
. This particular container has approximately the same height as the cargo compartment and fits across half of its width. ULDs are loaded with baggage and are transported to the aircraft on dolly carts and loaded into the baggage hold by a loader designed for the task. By means of belts and rollers an operator can maneuver the ULD from the dolly cart, up to the aircraft baggage hold door, and into the aircraft. Inside the hold, the floor is also equipped with drive wheels and rollers that an operator inside can use to move the ULD properly into place. Locks in the floor are used to hold the ULD in place during flight. For consolidated freight loads, like a pallet of boxes or an item too oddly shaped to fit into a container, flat metal pallets that resemble large baking sheets that are compatible with the loading equipment are used.


See also


Lists

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Regional jet A regional jet (RJ) is a jet-powered regional airliner with fewer than 100 seats. The first one was the Sud-Aviation Caravelle in 1959, followed by the widespread Yakovlev Yak-40, Fokker F-28, and BAe 146. The 1990s saw the emergence of ...
s * List of civil aircraft *
List of regional airliners The following is a list of commercial short-haul civilian passenger "regional" airliners with significant build numbers. Regional airliners typically seat fewer than 100 passengers and fill the short-hop role in the hub and spoke model of passen ...
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List of airliners by maximum takeoff weight This is a list of aircraft sorted by maximum takeoff weight. Airplanes MTOW = Maximum take-off weight, MLW = Maximum landing weight, TOR = Take-off run ( SL, ISA+15°, MTOW), LR = Landing run (SL, ISA+15°, MLW) Helicopters MTOW = Maximum take- ...


Topics

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Aircraft design process The aircraft design process is a loosely defined method used to balance many competing and demanding requirements to produce an aircraft that is strong, lightweight, economical and can carry an adequate payload while being sufficiently reliable to ...
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Aircraft spotting Aircraft spotting, or plane spotting is a hobby of tracking the movement of aircraft, which is often accomplished by photography. Besides monitoring aircraft, plane spotting enthusiasts (who are usually called plane spotters) also record informa ...
* Aviation and the environment *
Aviation safety Aviation safety is the study and practice of managing risks in aviation. This includes preventing aviation accidents and incidents through research, educating air travel personnel, passengers and the general public, as well as the design of airc ...
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Flight length In aviation, the flight length refers to the distance of a flight. Commercial flights are often categorized into long-, medium- or short-haul by commercial airlines based on flight length, although there is no international standard definition and ...
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Flight planning Flight planning is the process of producing a flight plan to describe a proposed aircraft flight. It involves two safety-critical aspects: fuel calculation, to ensure that the aircraft can safely reach the destination, and compliance with air tr ...


References


Bibliography

* Andrews, C.F. and Eric B. Morgan. ''Vickers Aircraft since 1908, Second edition''. London: Putnam, 1988. . * Barnes, C.H. ''Bristol Aircraft since 1910''. London: Putnam, First Edition, 1964 (1987 reprint). . * Chillon J., J-P Dubois and J.Wegg. ''French Postwar Transport Aircraft.'' Tonbridge, Kent, UK: Air-Britain (Historians) Limited. 1980. . * Faith, Nicholas. ''Black Box: Why Air Safety is no Accident, The Book Every Air Traveller Should Read''. London: Boxtree, 1996. . * * . * Jackson, A.J. ''British Civil Aircraft since 1919: Volume II''. London:Putnam, Second edition 1973. . * Jackson, A.J. ''British Civil Aircraft 1919–1972: Volume III''. London: Putnam, revised second edition, 1988. . * * * * Norris, Geoffrey. ''The Short Empire Boats'' (Aircraft in Profile Number 84). Leatherhead, Surrey, UK: Profile Publications Ltd., 1966. * *


Further reading

* * * * {{Authority control Russian inventions