Method and apparatus for windmill starts

Details Method and apparatus for windmill starts Method and apparatus for windmill starts

F - Mech Eng,Light,Heat,Weapons

02

K

60/57, 60/81

F02K 3/06 (2006.01) F02K 3/12 (2006.01)

Patent

CA 1099118

13DV-6914 METHOD AND APPARATUS FOR WINDMILL STARTS Abstract A torque converter is interconnected between the fan and core rotor of a turbofan engine such that the speed of the core rotor can be boosted from windmill speed to a speed sufficient to allow an in-flight start by selectively extracting power from the windmilling fan during the start sequence of the engine. Control logic is included to automatically drain the oil from, and thereby unload, the torque converter whenever the engine is in the operating speed region. Further assurance is provided by an overrunning clutch which decouples the system when the core rotational speed exceeds the converter output.

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