For military purposes gyros used for communications, intelligence, artillery spotters. Autogyro designed by Kamov "A-7" was first used near Vyborg(Viipuri) in the Soviet-Finnish War of 1939-40. At the early phase of Second World War, by a Directive of General Staff of 07.05.1941 was formed 1-I Authogiro Squadron (EAC), composed of six gyros A-7-5A Kamov design, which took part in the combat operations during Tallinn offensive. "
COMBAT WINGED gyroplane A-7-3A.
A-7-3A - twin seater gyro close range scout and spotter. Gyrorotor - a three-blade. Each blade had a boom of a steel pipe, wooden ribs and stringers. Trailing edge are made of stainless steel, the sock is sheathed with plywood, and the entire blade with canvas. The blades were hung to the bush with the vertical and horizontal joints. Before takeoff rotor spun through a mechanical transmission from the engine. Transmission system had a special clutch with hydraulic drive. In flight, the rotor is developed at 200 rpm. The fuselage consisted of a central part, which includes three compartments (tanks, cockpit, observer's cockpit), and the tail boom. The design of the fuselage truss of steel pipes. Plating in the bow - made of anodized aluminum, in the tail - the canvas. The wing consisted of a center section with a V-shaped braces, and console units with ailerons. Wing wood with fabric covering. Wing and rotor blades can be folded for easier storage and transportation. Plumage with a metallic fabric covering. Gyroplane wheeled chassis with nose wheel. Wheels with close type duralumin fairings and hydraulic brakes. The power plant consisted of a radial air-cooled engine M-22 with a variable pitch prop (set on the ground). Cylinder Heads covered by Townend ring . Gyroplane armed with three guns PV-1 (one synchronous and two on the turret). Radio equipment ,photo equipment, electrical equipment, instrument panels roughly corresponded to the plane P-5.
A-7-5A.Similar to the A-7-3A with the exception of the engine, weapons, and cockpit. The power plant consisted of two air-cooled radial engines M-22 with three bladed coaxial vpp. Gyroplane armed with a machine gun turret on YES and two large-caliber 12.7 mm machine guns UB in the center section out of swept propeller space. Radio equipment photoequpment, electrical equipment, instrument panels corresponded to the Su-2.
A7-5A
A-7-7A.Further development of the series. Gyroplane - became a four bladed. Changed and the layout. Powerful offensive weapons has caused the need to move a power plant of two M-25 with coaxial three bladed push variable pitch propellers to the aft of fuselage. The rotor has a mechanism of the provisional rotation for power takeoff geared from the main power plant. Retractable wheeled landing gear with nose wheel. Design made it possible to fold the rotor blades back on vertical hinges, which, together with the lifting consoles was very valuable when transporting A-7.
A-7 was the last flying Kamov's autogyro. This was the first battle autogyro in the world and the first production rotary-wing apparatus in the USSR.
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Topic: SNARK - Autogyro went on the warpath! (Read 84566 times)
