Flap system for short takeoff and landing aircraft

Details Flap system for short takeoff and landing aircraft Flap system for short takeoff and landing aircraft

1986-11-10

1988-11-15

Barefoot, Galen

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244216, B64C 350

Patent

active

047843551

ABSTRACT:
A flap system for deploying high lift flaps on short takeoff and landing aircraft. The flap system utilizes an activating mechanism 27 that is used to extend a flap 12, a vane 22 and a spoiler 18 for maximum lift. The mechanism 27 utilizes relatively few linkage pieces and attached to the flap at single pivot points 44. The flap is supported by an actuator 46 and flap hinge support bracket 30. Increased mechanism rigidity and single pivot mountings allow use of roller 75 and track 74 guides at flap ends 78, 80 to smoothly guide flap movement and provide a fail-safe in case of pivot mounting failure. Spherical bearings 86 are utilized for mounting of rollers 75 and actuators 46, 60 in order to compensate for misalignment of the flap 12 and the flap mechanism 27 when used with tapered flaps on swept wing aircraft. The spoiler 22 is joined by a guide link 62 that adjusts spoiler position with flap 12 movement in order to maximize lift. The spoiler can also be used conventionally by activation of actuator 60.

REFERENCES:
patent: 2261363 (1941-11-01), Griswold, 2d
patent: 2405726 (1946-08-01), Zap
patent: 3478988 (1969-11-01), Roed
patent: 3767140 (1973-10-01), Johnson
patent: 3874617 (1975-04-01), Johnson
patent: 4120470 (1978-10-01), Whitener
patent: 4248395 (1981-02-01), Cole
patent: 4405105 (1983-09-01), Dilmaghani et al.
patent: 4434959 (1984-03-01), Ruldolph
Aviation, "New Type Flaps Lower C-74 Landing Speed", Nov. 1945, pp. 150-151.

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