The Pratt & Whitney R-1830 Twin Wasp is an American air-cooled

radial Radial is a geometric term of location which may refer to: Mathematics and Direction * Vector (geometric), a line * Radius, adjective form of * Radial distance (geometry), a directional coordinate in a polar coordinate system * Radial set * A ...

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

. It has 14 cylinders, arranged in two rings of seven. It displaces and its bore and stroke are both . The design traces its history to 1929 experiments at

Pratt & Whitney Pratt & Whitney is an American aerospace manufacturer with global service operations. It is a subsidiary of RTX Corporation (formerly Raytheon Technologies). Pratt & Whitney's aircraft engines are widely used in both civil aviation (especially ...

on twin-row designs. Production began in 1932 and it was widely used during the 1930s. It was selected as the power plant for both the four-engined

Consolidated B-24 Liberator The Consolidated B-24 Liberator is an American heavy bomber, designed by Consolidated Aircraft of San Diego, California. It was known within the company as the Model 32, and some initial production aircraft were laid down as export models desi ...

heavy bomber and the twin-engined

Douglas DC-3 The Douglas DC-3 is a propeller-driven airliner manufactured by the Douglas Aircraft Company, which had a lasting effect on the airline industry in the 1930s to 1940s and World War II. It was developed as a larger, improved 14-bed sleeper ...

transport, two of the most-produced aircraft. The production run of 173,618 R-1830 examples makes it the most-produced aviation engine in history. A further developed version, the R-2000, was produced starting in 1942. The R-2000 was "bored-out" to and had a number of other minor changes to improve fuel economy and allow it to run at higher power ratings on lower-

octane Octane is a hydrocarbon and also an alkane with the chemical formula C8H18, and the condensed structural formula CH3(CH2)6CH3. Octane has many structural isomers that differ by the location of branching in the carbon chain. One of these isomers ...

fuel. The primary user of the R-2000 was 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 1960 ...

. Mostly retired today, the R-1830 is still used on Douglas DC-3 and various museum aircraft and

warbird A warbird is any vintage military aircraft now operated by civilian organizations and individuals, or in some instances, by historic arms of military forces, such as the Battle of Britain Memorial Flight, the Royal Australian Air Force's No. 100 ...

s seen at airshows. It is not manufactured anymore, but spares are still available and there is still a market for second-hand engines and parts.

Variants

* R-1830-1: * R-1830-9: , * R-1830-11: * R-1830-13: , , * R-1830-17: * R-1830-21: * R-1830-25: * R-1830-33: * R-1830-35: Fitted with GE B-2

turbosupercharger In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into th ...

* R-1830-41: Fitted with GE B-2 turbosupercharger * R-1830-43: * R-1830-45: * R-1830-49: * R-1830-64: , * R-1830-65: * R-1830-66: , , * R-1830-72: * R-1830-75: * R-1830-76: * R-1830-82: * R-1830-86: * R-1830-88: * R-1830-90: * R-1830-90-B: * R-1830-92: * R-1830-94: * R-1830-S1C3-G: , * R-1830-S3C4-G: * R-1830-S6C3-G: * R-1830-SC-G: * R-1830-SC2-G: , * R-1830-SC3-G: same engine built in Sweden as STWC-3G by SFA company for Swedish J 22, B 17 and B 18.

Applications

* Bloch MB.176 *

Boeing XB-15 The Boeing XB-15 (Boeing 294) was a United States bomber aircraft designed in 1934 as a test for the United States Army Air Corps (USAAC) to see if it would be possible to build a heavy bomber with a range. For a year beginning in mid-1935 it w ...

* Budd RB Conestoga * Burnelli CBY-3 *

CAC Boomerang The CAC Boomerang is a fighter aircraft designed and manufactured in Australia by the Commonwealth Aircraft Corporation between 1942 and 1945. Approved for production shortly following the Empire of Japan's entry into the Second World War, the ...

– Australian "emergency fighter" * CAC Woomera *

Consolidated PBY Catalina The Consolidated Model 28, more commonly known as the PBY Catalina (U.S. Navy designation), is a flying boat and amphibious aircraft designed by Consolidated Aircraft in the 1930s and 1940s. In U.S. Army service, it was designated as the OA- ...

Consolidated PB2Y Coronado The PB2Y Coronado is a large flying boat Maritime patrol aircraft, patrol bomber designed by Consolidated Aircraft, and used by the US Navy during World War II in bombing, antisubmarine, medical/hospital plane, and transport roles. Obsolete b ...

Consolidated PB4Y Privateer The Consolidated PB4Y-2 Privateer is an American World War II and Korean War era patrol bomber of the United States Navy derived from the Consolidated B-24 Liberator. The Navy had been using B-24s with only minor modifications as the PB4Y-1 L ...

Curtiss P-36 Hawk The Curtiss P-36 Hawk, also known as the Curtiss Hawk Model 75, is an American-designed and built fighter aircraft of the 1930s and 40s. A contemporary of the Hawker Hurricane and Messerschmitt Bf 109, it was one of the first of a new generation ...

DAP Beaufort DAP or Dap may refer to: Science * DAP (gene), human gene that encodes death-associated proteins, which mediate programmed cell death * Diamidophosphate, phosphorylating compound * Diaminopimelic acid, amino acid derivative of lysine * Diaminopy ...

– Australian-built variants of Bristol Beaufort *

Douglas C-47 Skytrain The Douglas C-47 Skytrain or Dakota ( RAF designation) is a military transport aircraft developed from the civilian Douglas DC-3 airliner. It was used extensively by the Allies during World War II. During the war the C-47 was used for tro ...

Douglas DB-7 The Douglas A-20 Havoc (company designation DB-7) is an American light bomber, attack aircraft, Intruder (air combat), night intruder, night fighter, and reconnaissance aircraft of World War II. Designed to meet an Army Air Corps requirement for ...

– early variants only *

Douglas TBD Devastator The Douglas TBD Devastator is a retired American torpedo bomber of the United States Navy. Ordered in 1934, it first flew in 1935 and entered service in 1937. At that point, it was the most advanced aircraft flying for the Navy, being the firs ...

FFVS J 22 The FFVS J 22 was a Swedish single-engine fighter aircraft developed for the Swedish Air Force during World War II. Development At the onset of World War II, the Swedish Air Force (''Flygvapnet'') was equipped with largely obsolete Gloster Gla ...

– "emergency fighter"; built in-house by the Swedish Air Force *

Grumman F4F Wildcat The Grumman F4F Wildcat is an American carrier-based A carrier-based aircraft (also known as carrier-capable aircraft, carrier-borne aircraft, carrier aircraft or aeronaval aircraft) is a naval aircraft designed for operations from aircra ...

I.Ae. 24 Calquin The I.Ae.24 Calquin (a Mapudungun word which means "Royal Eagle") was a tactical bomber designed and built by the ''Instituto Aerotécnico'' at Córdoba, Argentina, Córdoba, in Argentina in the immediate post-World War II era. Although superfici ...

* Laird-Turner Meteor LTR-14 * Lioré et Olivier LeO 453 *

Lockheed Model 18 Lodestar The Lockheed Model 18 Lodestar is an American passenger transport aircraft of the World War II era, developed as part of the Model 10 Electra family, specifically from the Lockheed Model 14 Super Electra. Design and development Sales of the 1 ...

* Lisunov Li-3 – a Yugoslav version of the Lisunov Li-2 *

Martin Maryland The Martin Model 167 Maryland was an American light bomber Martin Maryland
Milit ...

Martin M-130 The Martin M-130 was a commercial flying boat designed and built in 1935 by the Glenn L. Martin Company in Baltimore, Maryland, for Pan American Airways. Three were built: the ''China Clipper'', the ''Pan Am Flight 1104, Philippine Clipper'' and ...

Republic P-43 Lancer The Republic P-43 Lancer was a single-engine, all-metal, low-wing monoplane fighter aircraft built by Republic, first delivered to the United States Army Air Corps in 1940. A proposed development was the P-44 Rocket. While not a particularly out ...

Saab 17 The Saab 17 is a Sweden, Swedish single-engine monoplane reconnaissance dive-bomber aircraft of the 1940s originally developed by AB Svenska Järnvägsverkstädernas Aeroplanavdelning, ASJA prior to its merger into Saab AB , Saab. It was the fir ...

Saab 18 The Saab 18 was a twin-engine bomber and reconnaissance aircraft, designed and built by Svenska Aeroplan AB (SAAB) for use by the Swedish Air Force in response to a 1938 design competition. Due to delays, it did not enter service until 1944, but ...

Short Sunderland The Short S.25 Sunderland is a British flying boat Maritime patrol aircraft, patrol bomber, developed and constructed by Short Brothers for the Royal Air Force (RAF). The aircraft took its service name from the town (latterly, city) and port of ...

V *

Seversky P-35 The Seversky P-35 is an American fighter aircraft built by the Republic Aviation, Seversky Aircraft Company in the late 1930s. A contemporary of the Hawker Hurricane and Messerschmitt Bf 109, the P-35 was the first single-seat fighter in United ...

Vickers Wellington The Vickers Wellington (nicknamed the Wimpy) is a British twin-engined, long-range medium bomber. It was designed during the mid-1930s at Brooklands in Weybridge, Surrey. Led by Vickers-Armstrongs' chief designer Rex Pierson, a key feature of t ...

IV *

VL Myrsky The VL Myrsky ("Storm") is a Finnish World War II fighter aircraft originally developed by Valtion lentokonetehdas for the Finnish Air Force. The models of the aircraft were Myrsky I, Myrsky II, and Myrsky III. It was designed by Edward Wegeliu ...

– Finnish "emergency fighter" * Vultee P-66 Vanguard

Engines on display

* Model R-1830-65 on display at the Museo Nacional de Aeronautica, Buenos Aires, Argentina * Model R-1830-86 on display at the

New England Air Museum The New England Air Museum (NEAM) is an American aerospace museum located adjacent to Bradley International Airport in Windsor Locks, Connecticut. The museum consists of three display hangars with additional storage and restoration hangars. Its ...

Bradley International Airport Bradley International Airport – historically known as Bradley Field – is a public international airport in Windsor Locks, Connecticut, Windsor Locks, Connecticut, United States. Owned and operated by the Connecticut Airport Authority, Con ...

Windsor Locks, Connecticut Windsor Locks is a New England town, town in Hartford County, Connecticut, United States. The town is part of the Capitol Planning Region, Connecticut, Capitol Planning Region. As of the 2020 United States Census, 2020 census, its population was ...

. * Model R-1830-90C on display at the Dutch aviation museum

Aviodrome The Nationaal Luchtvaart-Themapark Aviodrome (also known simply as Aviodrome) is a large aerospace museum in the Netherlands that has been located on Lelystad Airport since 2003. Previously the museum was located at Schiphol Airport.

* Model R-1830-92 displayed at the

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums, Education center, education and Research institute, research centers, created by the Federal government of the United States, U.S. government "for the increase a ...

National Air and Space Museum The National Air and Space Museum (NASM) of the Smithsonian Institution is a museum in Washington, D.C., in the United States, dedicated to history of aviation, human flight and space exploration. Established in 1946 as the National Air Museum, ...

Washington, DC Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...

* Model R-1830 on display at the Northeast Classic Car Museum in

Norwich, New York Norwich is a city and the county seat of Chenango County, New York, United States. Surrounded on all sides by the Town of Norwich, the city's name is taken from Norwich, England. Its population was 7,190 at the 2010 census. Norwich is best kn ...

* Model R-1830 cut-away display at Airbase Arizona Museum in Mesa, Arizona

Specifications (R-1830-S1C-G)

References

Notes

Bibliography

* * *Gunston, Bill. ''World Encyclopedia of Aero Engines: From the Pioneers to the Present Day''. 5th edition, Stroud, UK: Sutton, 2006. *White, Graham. ''Allied Aircraft Piston Engines of World War II: History and Development of Frontline Aircraft Piston Engines Produced by Great Britain and the United States During World War II''. Warrendale, Pennsylvania: SAE International, 1995.

External links

Pratt & Whitney's R-1830 page

List of R-1830 Variants
{{DEFAULTSORT:Pratt and Whitney R-1830 Twin Wasp Aircraft air-cooled radial piston engines R-1830 1930s aircraft piston engines