Automatic lock-positioning of foldable helicopter blades

Details Automatic lock-positioning of foldable helicopter blades Automatic lock-positioning of foldable helicopter blades

1980-10-10

1982-10-12

Smith, Jerry

Boots, shoes, and leggings

244 1713, 416143, G06F 1520, B64C 2750

Patent

active

043542344

ABSTRACT:
The foldable rotor blades (12) of a helicopter are automatically adjusted to pitch angles where they can be locked as a prerequisite to folding by commands generated (98, 112) to cause trim actuators (39-41) to drive swash plate servos (17-19) to the correct positions, initially (98) in response to stored trim references (120) and eventually (112) in response to the difference (109) between stored swash plate servo positions (120) and current servo positions (20-22).

REFERENCES:
patent: 3698662 (1972-10-01), Rostad
patent: 3765794 (1973-10-01), Kudasch et al.
patent: 3874817 (1975-04-01), Ferris
patent: 4252504 (1981-02-01), Covington et al.
patent: 4268222 (1981-05-01), Bernard

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