Aircraft electrical system providing emergency power and electri

Details Aircraft electrical system providing emergency power and electri Aircraft electrical system providing emergency power and electri

1996-01-22

1999-05-04

Jordan, Charles T.

Aeronautics and astronautics

Aircraft power plants

244 58, 290 44, 60 39142, B64D 3300

Patent

active

058994114

ABSTRACT:
An aircraft is provided that includes one or more engines, an air-driven generator, and a start-circuit for operably connecting an electrical output of the air driven generator for starting one or more of the engines while the aircraft is in flight. Various embodiments also provide apparatus for cross-ship electric starting of multiple engines while the aircraft is in flight or on the ground using: an electrical output of a generator attached to another engine; on-board batteries; an on board auxiliary power unit; or power received from a ground source. A single start-converter is utilized to supply power to AC starter-motors for electric starting of the aircraft's engines. In some embodiments, the engine is soft-started with the air driven generator, by controlling blade pitch in an air driven turbine driving the air driven generator, without the use of the start converter.

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SAE Technical Paper 932559 "System Design Considerations for an APU Starter Generator".
U.S. application No. 08/1553180/B04962, Althof et al., filed Nov. 7, 1995.

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