Title: Twinjet - Wikipedia
Headings: Twinjet
Twinjet
Contents
Aircraft configurations
History
Efficiency
ETOPS
Introduction to transoceanic flights
Other advantages
See also
References
External links

Content: These considerations have led to the widespread use of aircraft of all types with twin engines, including airliners, fixed-wing military aircraft, and others. Contents
1 Aircraft configurations
2 History
3 Efficiency
4 ETOPS
4.1 Introduction to transoceanic flights
5 Other advantages
6 See also
7 References
8 External links
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. The second has one engine mounted on each side of the rear fuselage, close to its empennage, used by many business jets . In the third configuration both engines are within the fuselage, side-by-side, used by most fighters since the 1960s. Later fighters using this configuration include the Su-27 'Flanker', the F-15 Eagle, and the F-22 Raptor . History
The first twinjet to fly was the German fighter prototype Heinkel He 280, flying in April 1941 with a pair of nacelled Heinkel HeS 8 axial-flow turbojets. The twinjet configuration was used for short-range narrow-bodied aircraft such as the McDonnell Douglas DC-9 and Boeing 737. The Airbus A300 was initially not successful when first produced as a short-range widebody, as airlines operating the A300 on short-haul routes had to reduce frequencies to try and fill the high-capacity aircraft, and lost passengers to airlines operating more frequent narrow-body flights. However, thanks to the introduction of ETOPS rules that allowed twin-engine jets to fly long-distance routes that were previously off-limits to them, Airbus was able to further develop the A300 as a medium- to long-range airliner to increased sales;