The Illustrated Encyclopedia of Helicopters

aeroplane Aérospatiale Air Force Alouette Alvis Leonides anti anti-submarine anti-torque armed autogyro aviation became Bell Model Bell Model 47 Bensen Bratukhin Breguet British built cabin capable carried Cierva civil co-axial commercial configuration contra-rotating convertiplane copter crew cyclic pitch cyclic pitch control developed evaluation experimental exported Fairey Fairey Rotodyne feet first-ever flew flown flying flying-crane fuselage German Gyroplane Gyroplane Laboratoire heli Hughes Kaman Kamov Kamov Ka-25 km/h layout lift Lycoming machine maiden flight main rotor maximum speed metres military missiles Model 47 model helicopter nose operations passenger payload Piasecki pilot piston engine powered Pratt & Whitney production propeller prototype rescue rotary-winged aircraft Rotodyne rotor blades rotorcraft Royal Navy Sikorsky Sikorsky S-51 single-seater small number Soviet Union squadron stretchers tail rotor tethered tion transport troops TSAGI Turboméca Artouste turboshaft turboshaft engines twin-rotor two-seat U.S. Army U.S. Navy vertical Vietnam Westland wings