Helicopter engine control with rotor speed decay anticipator

Details Helicopter engine control with rotor speed decay anticipator Helicopter engine control with rotor speed decay anticipator

F - Mech Eng,Light,Heat,Weapons

02

C

341/38.1

F02C 9/26 (2006.01) B64C 27/06 (2006.01) F02C 9/28 (2006.01) G05D 1/08 (2006.01)

Patent

CA 1198191

Helicopter Engine Control With Rotor Speed Decay Anticipator Abstract The speed (54, 56) of the free turbine (40) of a helicopter engine (20) is compared (103) with the speed (105, 106) of the helicopter rotor (10) to indicate (101, 102) autorotation, and the deceleration (108) of the rotor above a threshold magnitude (110) is utilized (81, 68, 69) to increase fuel flow (72) to the engine in anticipation of rotor speed droop which would otherwise occur during recovery from the autorotation maneuver.

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