Aircraft propulsion system using air liquefaction and storage
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United States of America Patent
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-
Apr 21, 1992
Grant Date -
N/A
app pub date -
Dec 29, 1989
filing date -
Dec 29, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An aircraft propulsion system includes a propeller for propelling the aircraft, an electric motor for driving the propeller, and an electrochemical fuel cell for receiving an oxidizer and providing propulsion power to the electric motor. An air liquefaction system is used for receiving ambient air and providing oxidizer to the fuel cell. Preferably, at low altitude, the air liquefaction system provides oxidizer to the fuel cell and to an oxidizer fuel tank. Then, during high altitude excursions, the oxidizer is provided to the fuel cell from the oxidizer fuel tank. When the oxidizer tank is empty, the aircraft returns to a lower altitude where extraction of oxidizer from the atmosphere is resumed.
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