Airplane automatic control force trimming device for asymmetric

Details Airplane automatic control force trimming device for asymmetric Airplane automatic control force trimming device for asymmetric

1985-10-23

1987-03-10

Barefoot, Galen

Aeronautics and astronautics

Aircraft control

Automatic

340967, B64C 1300

Patent

active

046485694

ABSTRACT:
The difference in dynamic pressure in the propeller slipstreams as measured by sensors 20 and 20a is divided by the freestream dynamic pressure generating a quantity proportional to the differential thrust coefficient. This quantity is used to command an electric trim motor 26 to change the position of trim tab 14 thereby retrimming the airplane to the new asymmetric power condition. The change in position of the trim tab produced by the electric trim motor is summed with the pilot's input to produce the actual trim tab position.

REFERENCES:
patent: 2597020 (1952-05-01), Nissen
patent: 2954944 (1960-10-01), Huet
patent: 3023985 (1962-03-01), Hong et al.
patent: 3045954 (1962-07-01), Schmidt et al.
patent: 3160367 (1964-12-01), Lecarme
patent: 3193219 (1965-07-01), Parker et al.
patent: 4143839 (1979-03-01), Antonov et al.
patent: 4538777 (1985-09-01), Hall
patent: 4546353 (1985-10-01), Stockton

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