0 a turbine used as an engine, especially for an aircraft, that provides some force for movement from the gas that it pushes out, and some by turning a large special wheel with blades that also pushes air out, or an aircraft driven by this type of engine --
Following the crash, it is now mandatory to test all newly designed and significantly redesigned turbofan engines under representative flight conditions.
It is particularly effective on turbofans since they are required to respond quickly to changes of the thrust setting.
The endurance requirement is so strenuous that a turbofan engine may not be a viable option.
Nevertheless, further studies of the geared turbofan concept were announced.
This was a complex design featuring contra-rotating stages and a bypass fan, making it one of the earliest turbofan designs to be produced.
Modern military transport turbofan engines are virtually identical to their civilian counterparts.
The turbofans on twin engined airliners are further over-sized to cope with losing one engine during take-off, which reduces the aircraft's net thrust by 50%.
These engines have the fuel efficiency advantages of turboprops with the performance capability of commercial turbofans.
