Intake control for air utilizing aircraft engines

Details Intake control for air utilizing aircraft engines Intake control for air utilizing aircraft engines

1976-05-11

1977-05-24

Blix, Trygve M.

Aeronautics and astronautics

Aircraft power plants

137 152, B64D 3302

Patent

active

040250083

ABSTRACT:
An air intake control for an air utilizing jet aircraft engine. The control is provided with fixed and movable air intake control ramps and the positioning of such movable ramps for air control purposes is determined by the static pressure above one thereof modified by the static pressure of the external air flow, the total pressure and the angle of attack of the aircraft. One control parameter is produced by a device responsive to the relationship between the static pressure above the one movable ramp and the total pressure of the external air flow. Particularly, this pressure relationship is calculated as a function of the operating cylinder feedback signal indicating the actual position of the center ramp, and is applied as a modifying value to a summing junction provided in the control circuit to produce a variable demand signal. The variable demand signal so generated is then compared with a signal representing a corresponding actual pressure relationship and the error signal, if any, so generated effects a corrective movement of the movable ramps until the error signal becomes zero.

REFERENCES:
patent: 2969939 (1961-01-01), Sulkin et al.
patent: 2997843 (1961-08-01), Arnett et al.
patent: 3181817 (1965-05-01), Marcus et al.
patent: 3266239 (1966-08-01), Simpson et al.
patent: 3533238 (1970-10-01), Marvin
Loschke, Def. Pub. of S.N. 853,601, filed 8-20-1969, published in 875 O.G. 361 on 6-16-1970, Def. Pub. No. T875,015.

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