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Trijets
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 technology. Trijets are more efficient than quadjets, but not as efficient as twinjets, which replaced trijets as larger and more reliable turbofan engines became available. Types still in production The Dassault Falcon 7X/8X and the Dassault Falcon 900 are the only civilian trijets in production and the Chengdu J-36 is the only military trijet in production. Design One consideration with trijets is positioning the central engine. This is usually accomplished by placing the engine along the centerline, but still poses difficulties. The most common configuration is having the central engine located in the rear fuselage and supplied with air by an S-shaped duct; this is used on the Hawker Siddeley Trident, Boeing 727, Tupolev Tu-154, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ETOPS
The Extended-range Twin-engine Operations Performance Standards (ETOPS) () are safety standards set by the International Civil Aviation Organization (ICAO) for Twinjet, twin-engine commercial passenger aircraft operations. They are a safety measure intended to ensure that in the event of a single engine failure, an aircraft will still be able to reach a diversion airport using the remaining operational engine. This may be at a reduced speed and/or height, and usually applies to flights over water or remote lands, typically routes previously restricted to three- and four-engine aircraft. History In 1936, the predecessor to the Federal Aviation Administration (FAA), the U.S. Bureau of Air Commerce, restricted commercial operations within United States airspace to within of an adequate airport. For many aircraft of that era this meant about 60 minutes with one engine inoperative. In 1953, with Aircraft engine#Reciprocating (piston) engines, piston engine reliability and aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dassault Falcon 7X
The Dassault Falcon 7X is a large-cabin, range business jet manufactured by Dassault Aviation. Unveiled at the 2001 Paris Air Show, its first flight took place on 5 May 2005 and it entered service on 15 June 2007. The Falcon 8X, first delivered on 5 October 2016, is derived from the 7X and has an extended range of made possible through engine optimization, aerodynamic refinements as well as an increase in fuel capacity.The 8X and the Falcon 900 are the only trijets still in production, . Falcon 7X Development Dassault launched the FNX at the 2001 Paris Air Show, aiming for a 10,500km (5,700nm) range at Mach 0.88, up from the Falcon 900EX's 8,300 km at Mach 0.84. Its new high-speed wing is longer with 5° higher wing sweep than the 900 wing; while its fuselage is 20% longer, it keeps the same cabin cross-section but with a new curved windscreen. The trijet has a combined thrust of 18,000lb (80kN) provided by Honeywell FX5s, a new design, or a Pratt & Whitney Canada P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McDonnell Douglas MD-11
The McDonnell Douglas MD-11 is an American trijet wide-body aircraft, wide-body airliner manufactured by American manufacturer McDonnell Douglas (MDC) and later by Boeing. Following McDonnell Douglas DC-10, DC-10 development studies, the MD-11 program was launched on December 30, 1986. Assembly of the first prototype began on March 9, 1988. Its maiden flight occurred on January 10, 1990, and it achieved Federal Aviation Administration (FAA) certification on November 8. The first delivery was to Finnair on December 7 and it entered service on December 20, 1990. It retains the basic trijet configuration of the DC-10 with updated GE CF6-80C2 or PW4000 turbofan engines. Its wingspan is slightly larger than the DC-10 and it has Wingtip device, winglets. Its maximum takeoff weight (MTOW) is increased by % to . Its fuselage is stretched by % to to accommodate 298 passengers in three classes over a Range (aeronautics), range of up to . It features a glass cockpit that eliminates the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Douglas DC-8, DC-8 for long-Range (aeronautics), range flights. It first flew on August 29, 1970; it was introduced on August 5, 1971, by American Airlines. The trijet has two turbofans on underwing pylons and a third one at the base of the vertical stabilizer. The twin-aisle layout has a typical seating for 270 in two classes. The initial DC-10-10 had a range for transcontinental flights. The DC-10-15 had more powerful engines for hot and high airports. The DC-10-30 and –40 models (with a third main landing gear leg to support higher weights) each had intercontinental ranges of up to . The KC-10 Extender (based on the DC-10-30) is a tanker aircraft that was primarily operated by the United States Air Force. Early operations of the DC-10 were afflicted by its poor safety record, which was partially attributable to a design flaw i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lockheed L-1011 TriStar
The Lockheed L-1011 TriStar (pronounced "El-ten-eleven") 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 commercial operations, after the Boeing 747 and the McDonnell Douglas DC-10. The airliner has a seating capacity of up to 400 passengers and a range of over . Its trijet configuration has three Rolls-Royce RB211 engines with one engine under each wing, along with a third engine center-mounted with an S-duct air inlet embedded in the tail and the upper fuselage. The aircraft has an autoland capability, an automated descent control system, and available lower deck Galley (kitchen), galley and lounge facilities. The L-1011 TriStar was produced in two fuselage lengths. The original L-1011-1 first flew in November 1970 and entered service with Eastern Air Lines in 1972. The shortened, longer range L-1011-500 first flew in 1978 and entered service with British Airways a year later. The o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tupolev Tu-154
The Tupolev Tu-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 airlines for several decades, it carried half of all passengers flown by Aeroflot and its subsidiaries (137.5 million/year or 243.8 billion passenger-km in 1990), remaining the standard domestic-route airliner of Russia and former Soviet states until the mid-2000s. It was exported to 17 non-Russian airlines and used as a head-of-state transport by the air forces of several countries. The aircraft has a cruising speed of and a range of . Capable of operating from unpaved and gravel airfields with only basic facilities, it was widely used in the extreme Arctic conditions of Russia's northern/eastern regions, where other airliners were unable to operate. Originally designed for a 45,000-hour service life (18,000 cycles), but capable of 80,000 hours with upgrades, it wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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) request. By 1960, de Havilland had been acquired by Hawker Siddeley. The Trident's maiden flight happened on 9 January 1962, and it was introduced on 1 April 1964, two months after its main competitor, the Boeing 727. By the end of the programme in 1978, 117 Tridents had been produced. The Trident was withdrawn from service in 1995. The jetliner is powered by three rear-mounted Rolls-Royce Spey low-bypass turbofans, it has a low swept wing and a T-tail. Advanced avionics allowed it to be the first airliner to make a blind landing in revenue service in 1965. The initial Trident 1/2 could seat 101–115 passengers over up to . The Trident 3 was stretched by to seat 180 over , and had an additional RB.162 booster engine in the tail. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chengdu J-36
The Chengdu J-36 ( zh, s=, t=, c=歼-36, p=Jiān Sānliù) is a speculative designation given by military analysts to a trijet tailless diamond-double-delta winged aircraft under development by the Chengdu Aircraft Corporation (CAC). As part of China's sixth-generation aircraft development program, the heavy stealth aircraft is envisioned for multiple mission set, including air superiority, strike, and command and control of aircraft teaming operations. On 26 December 2024, an aircraft believed to be a J-36 was spotted conducting test flights in Chengdu, Sichuan, China. Since the aircraft's serial number (36011) begins with '36,' following the People's Liberation Army Air Force convention, this model was presumably designated as J-36. Development and history In January 2019, Dr. Wang Haifeng, chief designer of the Chengdu Aircraft Corporation (CAC) announced that China had begun pre-research on a sixth-generation aircraft, predicting that the program would come to fruitio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dassault Falcon 900
The Dassault Falcon 900, commonly abbreviated as the F900, is a French-built corporate trijet aircraft made by Dassault Aviation. Development The Falcon 900 is a development of the Dassault Falcon 50, Falcon 50, itself a development of the earlier Dassault Falcon 20, Falcon 20. The Falcon 900 airframe design incorporates composite materials. Other models include the Falcon 900-B, featuring an increased range, and the Falcon 900EX featuring other improvements in engines and range and an all-glass cockpit, glass flight deck. The Falcon 900C is a companion to the Falcon 900EX and replaces the Falcon 900B. Later versions are the Falcon 900EX EASy, and the Falcon 900DX. At EBACE 2008, Dassault announced another development of the 900 series: the Falcon 900LX, incorporating high mach blended Wingtip device, winglets designed by Aviation Partners Inc. In 2023, the 900LX equipped price was $44.7 million. Operational service In France, the Falcon 900 is used by the Escadron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing 727
The Boeing 727 is an American Narrow-body aircraft, narrow-body airliner that was developed and produced by Boeing Commercial Airplanes. After the heavier Boeing 707, 707 quad-jet was introduced in 1958, Boeing addressed the demand for shorter flight lengths from smaller airports. On December 5, 1960, the 727 was launched with 40 orders each from United Airlines and Eastern Air Lines. The first 727-100 rolled out on November 27, 1962, first flew on February 9, 1963, and entered service with Eastern on February 1, 1964. The only trijet aircraft to be produced by Boeing, the 727 is powered by three Pratt & Whitney JT8D Turbofan, low-bypass turbofans below a T-tail, one on each side of the rear fuselage and a center one fed through an S-duct below the tail. It shares its six-abreast upper fuselage cross-section and cockpit with the 707 that was also later used on the Boeing 737, 737. The 727-100 typically carries 106 passengers in two classes over , or 129 in a single class. La ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadjet
A four-engined jet, sometimes called a quadjet, is a jet aircraft powered by four engines. The presence of four engines offers increased power and redundancy, allowing such aircraft to be used as airliners, freighters, and military aircraft. Many of the first purpose-built jet airliners had four engines, among which stands the de Havilland Comet, the world's first commercial jetliner. In the decades following their introduction, their use has gradually declined due to a variety of factors, including the approval of twin-engine jets to fly farther from diversion airports as reliability increased, and an increased emphasis on fuel efficiency. Design Podded engines The engines of a 4-engined aircraft are most commonly found in pods hanging from pylons underneath the wings. This can be observed in the Airbus A340, Airbus A380, and Boeing 747. Many military airlifters also feature this design, including the Antonov An-124, Boeing C-17 Globemaster, and Lockheed C-5 Galaxy. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twinjet
A twinjet or twin-engine jet is a jet aircraft powered by two jet engine, 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 efficiency of a twinjet is better than that of aircraft with more engines. These considerations have led to the widespread use of aircraft of all types with twin engines, including airliners, fixed-wing military aircraft, and others. Aircraft configurations There are three common configurations of twinjet aircraft. The first, common on large aircraft such as airliners, has a podded engine usually mounted beneath, or occasionally above or within, each wing. Most notable examples of such a configuration are the Boeing 737 and Airbus A320. The second has one engine mounted on each side of the rear fuselage, close to its empennage, used by many business jets, although some airliners like the Fokker 70, Douglas DC-9 and COMAC ARJ21 utilise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
