Aeronautics and astronautics – Aircraft control – Automatic
Patent
1975-05-29
1976-12-28
Blix, Trygve M.
Aeronautics and astronautics
Aircraft control
Automatic
244 1727, 416148, B64C 2772
Patent
active
039997260
ABSTRACT:
A helicopter fuselage is coupled to a pylon to permit fore/aft pivotal movement of the fuselage relative to the pylon with resilient means connected between the pylon and fuselage to oppose and limit such pivotal movement. Structure is then provided to decouple the rotor control linkages to permit limited fore/aft rotation of the fuselage relative to the pylon upon change of location of the center of gravity without introducing control motion in the control linkages. The control linkages include control tubes extending longitudinally of the fuselage from a pilot input location. Bell cranks are connected to the control tubes and are coupled as to control the pitch of rotor blades. Structure connecting the fuselage and each bell crank alters the pivot points of the bell cranks relative to the fuselage. The positions of the bell crank pivot points depend upon rotation of the fuselage relative to the pylon.
REFERENCES:
patent: 2163481 (1939-06-01), Cameron
patent: 2402349 (1946-06-01), Sikorsky
patent: 2468913 (1949-05-01), Avery
patent: 2615657 (1952-10-01), Young et al.
patent: 3118504 (1964-01-01), Cresap
patent: 3514052 (1970-05-01), McKeown
Carlson Floyd W.
Cresap Wesley L.
Barefoot Galen L.
Blix Trygve M.
Textron Inc.
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