GB404269A - Improvements in aircraft and control thereof - Google Patents

Abstract

404,269. Aircraft. ZAP DEVELOPMENT CORPORATION, 230, Park Avenue, New York, U.S.A. April 4, 1932, No. 9682. Convention date, April 3, 1931. [Class 4.] In aircraft variable means are provided to increase the drag on the rear portion of the lower side of a wing thus increasing the lift coefficient for the aircraft. The means may comprise a flap 12, Fig. 2, hinged to the trailing edge 11 of an aerofoil 10 and operated by a horn 13 and a wire 14. The flap 12 may extend wholly or partially from the fuselage to the wing tip, may be of uniform height or tapering. The flap may be submerged in a recess 20. In a modification a curved flap 25, Fig. 6, is pivoted forwardly of the trailing edge a sufficient distance to permit it to be completely housed within the aerofoil and is made in sections to miss the cord construction of the aerofoil. In a further modification a fixed depending flap is provided having channels in which slide telescoping sections. In a still further modification the aerofoil is provided with a series of pivoted depending blades 40, Fig. 12, pivoted at 41 and adapted to be moved in unison. These blades may be of various cross sections. An arrangement is shown in which the flaps are moved by lateral movement of the control stick, which is mounted to move universally and has an extension moving in a guide and connected to the elevator control wire. The flaps on the wings may be moved simultaneously or differentially.