Flutter prevention means for aircraft primary flight control sur

Details Flutter prevention means for aircraft primary flight control sur Flutter prevention means for aircraft primary flight control sur

1978-04-27

1979-11-06

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft control

244 83A, B64C 1300

Patent

active

041733223

ABSTRACT:
An apparatus attached to the flight control surface designed to lock the surface in a fixed and generally neutral position when a hydraulic pressure failure occurs. A spring loaded hydraulic actuator is mounted in the fixed wing structure but has an arm with a locking roller extending into a wedge shaped recess in the adjacent movable control surface. When hydraulic pressure is present the actuator spring is compressed and the locking roller on the actuator arm is moved to the wide end of the wedge, effectively avoiding any contact between the roller and the flight control surface surrounding it irrespective of the control surface orientation. Upon the occurrence of a hydraulic pressure drop, the compressed spring translates the actuator arm drawing the locking roller into a detent in the narrow end of the wedge, thereby inhibiting control surface rotation and flutter.

REFERENCES:
patent: 1747344 (1930-02-01), Bell
patent: 2246203 (1941-06-01), Florez
patent: 2835459 (1958-05-01), Stewart

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