Aircraft electrical system providing emergency power and electric starting of propulsion engines
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United States of America Patent
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-
May 4, 1999
Grant Date -
N/A
app pub date -
Jan 22, 1996
filing date -
Jan 22, 1996
priority date (Note) -
In Force
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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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