Title:
CONTROL OF THE INLET OF AN AUXILIARY POWER UNIT
Document Type and Number:
WIPO Patent Application WO2000055485
Kind Code:
A3
Abstract:
Control and method for adjusting the geometry of an inlet duct leading to an auxilary power unit in the tailcone of an aircraft. Therefor a closed loop control system is provided. Under this control system the flow area of the inlet duct is varied by opening and closing a duct door. The control assures that the position of the door is such that the delta P across the engine will not inhibit the starting of the engine in flight.
Inventors:
HARVELL JOHN
FREEMAN CRAIG
MICHALSKI JOSEPH
FREEMAN CRAIG
MICHALSKI JOSEPH
Application Number:
PCT/US2000/004385
Publication Date:
December 21, 2000
Filing Date:
February 22, 2000
Export Citation:
Assignee:
ALLIED SIGNAL INC (US)
International Classes:
F02C7/057
Foreign References:
| US4834622A | 1989-05-30 | |||
| US4418879A | 1983-12-06 | |||
| GB1480366A | 1977-07-20 | |||
| US4025008A | 1977-05-24 | |||
| US4523603A | 1985-06-18 | |||
| US4370560A | 1983-01-25 |
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