GB1081208A - Convertiplane - Google Patents

Abstract

1,081,208. Convertible aircraft. A. KISOVEC Sept. 14, 1965, No. 39147/65. Headings B7G and B7W. An aeroplane has wing panels capable of rotation about a substantially vertical axis to enable it to function as a helicopter. The aircraft described has fixed inner wing panels 30 and outer wing panels 34 mounted on rotor shafts (38, Figs. 3 and 4, not shown) extending downwardly into pylons (44) on which jet propulsion engines 32 for forward flight are mounted. Each shaft (38) carries a brake wheel (150) and brake drum (180) with mating conical surfaces, the wheel being lifted off the drum during wing rotation by centrifugal force on a fly-weight, and by hand through a link (204, Figs. 12 and 13, not shown) prior to rotation. The wheel and drum also carry co-operating abutments (178, 184) to stop the rotor shaft in the desired position. The wing panels 34 are each rotated by a jet engine (80, Fig. 3, not shown), and are accelerated and retarded by separate rocket motors (84, 86, 88) and (82, 90, 92). A synchronizing shaft (94, Fig. 4, not shown) connects the two wing panels 34. A flapping hinge (46) is provided on the rotor shaft, with a damper (66) comprising a piston-andcylinder, the opposite ends of which communicate through a valve controlled by a flyweight, the arrangement being that the valve is closed and flapping is prevented when the wing panels are not rotating. Each wing panel 34 is balanced by a weight 54 on a telescopic arm 52 retractable by an actuator (74) into a recess in the fixed wing panel 30. The outer wing panels may be pivotable about a feathering axis (Fig. 18, not shown), or may have ailerons which are used for cyclic longitudinal, and collective control during the helicopter mode. A swashplate (236, 238, Fig. 4, not shown) is connected to a cyclic control rod (312) and to a lever (268) pivotally mounted with the swashplate on sleeves (214, 218) slidable for collective control by rods (310, 318). Hydraulic links (Fig. 14, not shown) comprising pistons (248, 274) in cylinders (250, 276), the opposite ends of which communicate with valves movable by flyweights (262, 284) to fix or free the pistons, connect the swashplate and lever (268), and the lever and an arm (288) fixed to the sleeve (214). Thus the lever (268) moves with the swashplate during wing rotation, and is fixed at one end during fixed wing flight so that the ailerons or wing panels (34) can only be moved by the rods (310, 318). The collective control rod (318) is moved by lateral movement of a control stick (340, Fig. 17, not shown) or by movement of the collective control (392). The cyclic control rod (312) is moved by operation of the rudder pedals (356) or fore-and-aft movement of the control stick (340).