GB512619A - Improvements in or relating to aeroplanes - Google Patents

Abstract

512,619. Aeroplanes. ROBERT, R. March 7, 1938, No. 7130. Convention date, March 8, 1937, [Class 4] - An aeroplane comprises propelling means 1, Fig. 1, disposed centrally at the rear of the main supporting surface 3 between two longitudinal girders 8, 9, and tail planes 4, 5 having control surfaces 6, 7, are secured to the ends, of the girders and solely on the sides remote from the control longitudinal axis: The control surfaces may be turned through equal or unequal angles in the same or in opposite directions by the device shown in Fig. 6, the surfaces being connected by cables 14, 15 to shafts 16, 17, keyed to which are bevel gears 18, 19 in mesh with a bevel gear 20, integral with a lever 22 and rotatably mounted in a strap 21 rotatable on the shafts. The tail surfaces may be connected by a transverse girder 10, Fig. 2, to relieve the girders 8, 9 of torsional stress, and this girder may be enclosed in a streamlined envelope which may be movable or provided with a movable flap or flaps 11, Fig. 3, to trim the machine. In another form, Fig. 5.. the envelope 10<1> is provided with flaps 12, 13: which may be opened out to increase the drag: of the machine.