The Kuznetsov NK-92 was a military engine with a super-high

bypass ratio The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for eve ...

. The NK-92 was proposed to power the Ilyushin Il-106 heavy

military transport aircraft A military transport aircraft, military cargo aircraft or airlifter is a military aircraft, military-owned transport aircraft used to support military operations by airlifting troops and military equipment. Transport aircraft are crucial to m ...

. Development of the Il-106 aircraft and its NK-92 engine slowed in the early 1990s. However, aspects of the engine's design were applied to the NK-92's civil engine counterpart, the

Kuznetsov NK-93 The Kuznetsov NK-93 was a civilian aircraft engine, a hybrid between a turbofan and a turboprop known as a propfan. The engine was also unique in having a separate duct around the contra-rotating propellers, as most other propfans are unducted. ...

, which was tested in flight in the first decade of the 2000s. A ducted

propfan A propfan, also called an open rotor engine, open fan engine is an aircraft engine combining features of turbofans and turboprops. It uses advanced, curved propeller blades without a ducted fan, duct. Propfans aim to combine the speed capabili ...

engine with

contra-rotating Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque. Examples include some aircraft propellers, r ...

fans, the NK-92 was also a powerplant option on versions of the Ilyushin Il-90 and

Ilyushin Il-96 The Ilyushin Il-96 () is a Russian Four-engined jet aircraft, four-engined jet long-haul Wide-body aircraft, wide-body airliner designed by Ilyushin in the former Soviet Union and manufactured by the Voronezh Aircraft Production Association in R ...

widebody passenger airliners and the

EKIP EKIP (translated from , the Russian acronym for "", which means "Ecology and Progress") is the Soviet and Russian project of a multifunctional aerodrome-free aircraft, built according to the "flying wing" scheme, with an elliptically shaped fus ...

flying saucer A flying saucer, or flying disc, is a purported type of disc-shaped unidentified flying object (UFO). The term was coined in 1947 by the United States (US) news media for the objects pilot Kenneth Arnold UFO sighting, Kenneth Arnold claimed fl ...

lifting body A lifting body is a fixed-wing aircraft or spacecraft configuration in which the body itself produces lift (force), lift. In contrast to a flying wing, which is a wing with minimal or no conventional fuselage, a lifting body can be thought of as ...

References

Citations

Bibliography