Variable cycle engine

Details Variable cycle engine Variable cycle engine

B - Operations, Transporting

64

C

60/145, 60/84

B64C 29/04 (2006.01)

Patent

CA 1145570

Abstract A variable cycle turboshsft engine includes a remote fan system and respective high and low pressure systems for selectively driving the fan system in such a manner as to provide VTOL takeoff capability and minimum specific fuel consumption (SFC) at cruise and loiter conditions. For takeoff the fan system is primarily driven by the relatively large low pressure system whose combustor receives the m tive fluid from a core bypass duct and for cruise and loiter conditions, the fan system is driven by both a relatively small high pressure core and the low pressure system with its combustor Inoperative. A mixer is disposed downstream of the high pressure system for mixing the relatively cold air from the bypass duct and the relatively hot air from the core prior to its flow to the low pressure turbine.

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