Aircraft with disengageable engine and auxiliary power unit...

Details Aircraft with disengageable engine and auxiliary power unit... Aircraft with disengageable engine and auxiliary power unit...

2006-05-18

2010-10-05

Kim, Ted (Department: 3741)

Power plants

Combustion products used as motive fluid

Combined with starting feature

C060S802000, C060S039163

Reexamination Certificate

active

07805947

ABSTRACT:
Several improvements to an aircraft turbine engine and Auxiliary Power Unit (APU) are disclosed, as well as methods of using these improvements in routine and emergency aircraft operations. The improvements comprise the addition of cockpit-controllable clutches that can be used to independently disconnect the engine's integrated drive generator (IDG), engine driven pump (EDP), fuel pump, and oil pump from the engine gearbox. These engine components may then be connected to air turbines by the use of additional clutches and then powered by the turbines. Similar arrangements are provided for the APU components. Cranking pads, attached to various engine and APU components, are disclosed to provide a means for externally powering the components for testing purposes and to assist with engine and APU start. Detailed methods are disclosed to use the new components for routine ground-testing and maintenance and for the enhancement of flight safety, minimization of engine component damage, and extension of engine-out flying range in the case of an emergency in-flight engine shutdown.

REFERENCES:
patent: 2409159 (1946-10-01), Singleton
patent: 3965673 (1976-06-01), Friedrich
patent: 4077202 (1978-03-01), Schutze
patent: 4542722 (1985-09-01), Reynolds
patent: 4864812 (1989-09-01), Rodgers et al.
patent: 6142418 (2000-11-01), Weber et al.

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