Aircraft power unit with elective mechanical coupling

Details Aircraft power unit with elective mechanical coupling Aircraft power unit with elective mechanical coupling

1993-06-18

1994-05-03

Pellinen, A. D.

Prime-mover dynamo plants

Miscellaneous

Drive gearing

60 39141, 290 4R, 290 4C, 244 58, B64D 4100

Patent

active

053090292

ABSTRACT:
An integrated aircraft power unit providing the electrical and other forms of energy needed during auxiliary power unit operating conditions-while the aircraft is on the ground, and also providing airborne or emergency power including high altitude flight emergency conditions power wherein the power unit uses an oxidant supply carried by the aircraft. In this high altitude operating condition the power unit provides lower electrical output, but lower losses and improved efficiency over previous power units. The disclosed power unit includes separate electromechanical transducers or motor generator devices coupled to a segregated pair of rotational shaft members, one for the inlet or compressor fan and one for the outlet or exhaust turbine fan with electrical coupling and then friction clutch coupling of these shafts accomplished for low altitude high energy output operation of the power unit. The described power unit is also capable of providing these aircraft energy needs with a minimum of physical changes from conventional integrated aircraft power units.

REFERENCES:
patent: 2223703 (1940-12-01), Potez
patent: 3591843 (1971-07-01), Friedrich
patent: 3662975 (1972-05-01), Driskill
patent: 4147025 (1979-04-01), Friedrich et al.
patent: 4446392 (1984-05-01), Jaeschke
patent: 4684081 (1987-08-01), Cronin
patent: 4777793 (1988-10-01), Weigund et al.
patent: 4808869 (1989-02-01), Kopp
patent: 4898000 (1990-02-01), Weigund et al.
patent: 5036368 (1991-07-01), Nakamura
P. R. Wood & W. W. Spragins, Integrated Secondary Power System (ADS), Oct. 4-8, 1965, pp. 1-6.
P. J. Lawrenson, J. M. Stephenson, P. T. Blenkinsop, J. Corda, & N. N. Fulton, Variable-Speed Switched Reluctance Motors, 4 Jul. 1980, vol. 127, pp. 253-265.
B. J. Covey, B-1 Secondary Power Subsystem, Oct. 1-3, 1974, pp. 1-8.

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