Rotorcraft engine and rotor speed synchronization

Details Rotorcraft engine and rotor speed synchronization Rotorcraft engine and rotor speed synchronization

2011-01-11

2011-01-11

Lee, Benjamin P (Department: 3641)

Aeronautics and astronautics

Aircraft, heavier-than-air

Airplane and helicopter sustained

C244S017230, C244S056000, C074S333000, C192S048500

Reexamination Certificate

active

07866598

ABSTRACT:
Systems and methods are provided in which an electrical control system independently effects acceleration of both driven and driving elements of a clutch to engage each other. In preferred embodiments the clutch is not a friction clutch, but a dog clutch, and forms part of a drive drain of a rotorcraft. A second clutch can be used, along with a mechanical interlock to prevent simultaneous engagement of the clutches. Speeds of the driven and driving elements can be sensed, and altered using at least one of a rotor, a brake, a generator, an electric motor, and a combustion motor. In rotorcraft embodiments, the gearbox can have a neutral condition in which no power is transmitted from the engine to the rotor

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