GB402992A - Aeroplane with rotatable wings - Google Patents

Abstract

402,992. Supporting and controlling aircraft. CHAPPEDELAINE, J. L. M. O. DE, 51, Rue Chardon Lagache, Paris. April 21, 1933, No. 11744. Convention date, Jan. 28. [Class 4.] An aircraft fitted with wings of symmetrical or asymmetrical aerofoil section rotating about a transverse axis has means for fixing them against rotation for gliding flight and for adjusting them to different angles for lateral balancing. For balancing the machine when the wings are rotating the relative rate of rotation of the wings on the two sides of the machine may be varied by brakes. Alternatively ailerons may be used on a fixed wing below which the rotary wings are supported. The shaft 3 of the rotary wing 4 carries a disc 21 against which a disc 17 is adapted to be pressed when it is desired to retard the movement. The disc 17 is splined to a sleeve 7 mounted on a sleeve 1 fixed to a support 5, the sleeve 7 having an arm 9 normally kept in mid position by springs but capable of being moved by the pilot. The disc 17 is normally held out of contact with the disc 21 by springs 20 but when a disc 12, also splined to the sleeve 7, is moved by a forked lever 25, springs 18 press the discs into contact. Further pressure forces pins 13, 14 through holes in the disc 17 into recesses in the disc 21 to fix the rotating plane in a definite position. The spline grooves on the sleeve 7 are helical so as to start the rotation of the wing 4 in the right direction when the brake is withdrawn. The wings may be driven from the main engine through a freewheel clutch. The rotating wings may be mounted in openings in fixed wings. When the lever 9 is moved a projection 31 engaging a cam groove in the disc 12 causes the brake to be applied to the rotating wing.