Aircraft propeller control

Details Aircraft propeller control Aircraft propeller control

1987-09-14

1990-05-22

Chin, Gary

Boots, shoes, and leggings

364433, 416 34, 416 35, B64C 1150

Patent

active

049282417

ABSTRACT:
In the invention, the speeds of both propellers in a counterrotating aircraft propeller pair are measured. Each speed is compared, using a feedback loop, with a demanded speed and, if actual speed does not equal demanded speed for either propeller, pitch of the proper propeller is changed in order to attain the demanded speed. A proportional/integral controller is used in the feedback loop. Further, phase of the propellers is measured and, if the phase does not equal a demanded phase, the speed of one propeller is changed, by changing pitch, until the proper phase is attained.

REFERENCES:
patent: 2699304 (1955-01-01), Treseder et al.
patent: 2804154 (1957-08-01), Treseder et al.
patent: 3586262 (1971-06-01), Sherman
patent: 3589832 (1971-06-01), Harris et al.
patent: 3689175 (1972-09-01), Hartzell et al.
patent: 4245955 (1981-01-01), Lambertson
patent: 4653981 (1987-03-01), Harner et al.
patent: 4659283 (1987-04-01), Niessen et al.

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