Slotted variable camber flap

Details Slotted variable camber flap Slotted variable camber flap

1981-10-30

1984-04-24

Blix, Trygve M.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244215, 244219, 244212, B64C 920

Patent

active

044443684

ABSTRACT:
Variable camber actuator assemblies 50 broaden the range of speeds at which lift to drag performance is maximized for slotted flap wings. Lift is improved over a broader range of cruising speeds by varying wing camber with rotational flap movements that do not introduce wing slots and induced drag. Forward flaps 40 are secured to forward flange links 26 which extend from, and are a part of, forward flap linkage assemblies 20. The forward flaps 40 rotate about flap pivots 39 with their rotational displacement controlled by variable camber actuator assemblies 50 located between the forward flaps and the forward flange links. Rear flaps 45 are held relative to the forward flaps 40 by rear flap linkage assemblies 70 which may act independently from the forward flap linkage assemblies and the variable camber actuator assemblies. Wing camber is varied by rotating the flaps with the variable camber actuator assemblies while the flaps are in a deployed or tucked position. Rotating flaps in a tucked position does not introduce significant wing surface discontinuities, and reduces aircraft fuel consumption on most flight profiles.

REFERENCES:
patent: 3985319 (1976-10-01), Dean et al.
patent: 4248395 (1981-02-01), Cole
patent: 4283029 (1981-08-01), Rudolph

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