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Post Info TOPIC: TsAGI designations

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Date: Jun 15, 2010
TsAGI designations

Theres a few missing...

TsAGI A-10
TsAGI-Bratukhin 11-EA
TsAGI-Bratukhin 11-EA PV
TsAGI A-12
TsAGI A-13
TsAGI A-14
TsAGI A-15

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Date: Jun 5, 2014

New and improved list... nerd.gif


TsAGI 1-EA - Single-seat experimental helicopter with 4-blade main rotor and four small 2-blade anti-rotation propellers with variable pitch installed at the end of the fuselage. Powered by two M-2 air-cooled rotary engines. First tethered flight in 1930, first free flight around 1932. Tests continued until around 1934.

TsAGI 2-EA - Two-seat experimental autogyro similar to the Cierva C-19 Mk.III, designed by V. A. Kuznetsov. First flight in 1932.

TsAGI 3-EA - Experimental helicopter built in 1933 for training pilots. Identical to the 1-EA, except for a strut that replaces the rear wheel on the original layout.

TsAGI A-4 - Two-seat autogyro similar to the 2-EA but with single fin, more power, dual controls. Powered by one M-26 radial engine. First flight 1932. Impacted the ground on the second flight three days later due to unexplained rotor vibration and loss of lift. Different rotors were researched and resulted in a more satisfactory machine for production in 1933. Ten were delivered in 1934 (possibly a few more later) and served as trainers.

TsAGI 5-EA - Single-seat experimental helicopter similar to the 1-EA and 3-EA with two M-2 piston engines. Alternate rotor layout proposed by I.P. Bratukhin with three large blades with articulated roots which provided lift, and three smaller blades with rigid attachment which provided control. First flew in 1933 with tests continuing until late 1935.

TsAGI A-6 - Two-seat light autogyro with folding blades and wings, powered by one Shvetsov M-11 five-cylinder air-cooled radial engine. First flight in 1933 and showed as an improvement to the A-4. (How many built?) One tested the V (butterfly) tail in winter of 1933.

TsAGI A-7 - ?

TsAGI A-8 - Two seat autogyro based on the A-6 (with same engine) first flown in 1934. Specific changes to the design were: wings with 5-degree dihedral instead of upturned tips, ailerons, auxiliary fins on tailplane, and air/oil shock struts, the first of which in the Soviet Union at the time.

TsAGI A-9 - Wingless autogyro with M-11 radial engine.

TsAGI A-10 - A series of autogyro designs powered by one 480hp Shvetsov M-22 radial engine. The known variants are:

  • #? - Six-passenger autogyro designed by N.K. Skrzhinsky in 1933. Dropped in favor of the higher-speed A-12.
  • #5 - Two-seat wingless autogyro.
  • #6 - Single-seat wingless autogyro with three-blade main rotor designed in 1939.

TsAGI-Bratukhin 11-EA - Two-seat compound helicopter with 675hp (504kW) Curtiss V-1570 "Conqueror" 12-cylinder water-cooled engine. Two three-blade propellers near the tips of fixed wings counter the main rotor torque. Intention was to test as helicopter and later arrange for drive to main rotor to be disconnected and aircraft flown as autogyro, with all power used for forward propulsion via propellers, with aeroplane flight control. First tether flight in 1936. Further work halted in 1937 following the arrests of a few of the engineers.

  • 11-EA PV (Propulsivnyi Variant) - Alternate version of the 11-EA design lead by Bratukhin in 1938 with original auxiliary propellers replaced by pairs of anti-torque rotors from the 5-EA mounted at tips of outriggers of welded steel tube. First tether flight in early 1940. Project halted again in 1941 due to a worn out engine and no spares available at the time. It never flew again since.

TsAGI A-12 - Single-seat autogyro with 670hp Wright Cyclone engine (later M-25). First flight 1936. In 1937 it crashed due to the rotor disconnecting from the hub, resulting in the death of pilot I. Kozyrev.

TsAGI A-13 - Two-seat autogyro based on the A-6 and A-8 with folding blades and dihedralled wings, and twin-finned tail. Powered by one M-11 engine. First flown with skis in 1936.

TsAGI A-14 - Two-seat wingless autogyro based on the A-6 and A-8 with one M-11 engine. Designed (and built?) in 1935.

TsAGI A-15 - Two-seat wingless autogyro based on the A-12 and A-14 with one M-25V engine. Main gears with vertical shock struts carried on triangular outriggers each side of the fuselage. It was intended as a high-speed reconnaissance autogyro with forward ShKAS machine gun and a twin-ShKAS and AFA-13 camera located in an observer position behind the pilot. First flew around 1937 but crashed later on, resulting in the termination of Soviet autogyro development, until it was picked up again by Kharkov, Kuibyshev and Riga 30 years later.

TsAGI Stalker-501 "Ulun" - Current project for a tilt-rotor aircraft similar to the V-22 with T-tail.

TsAGI Stalker-502 - Twin-fuselage tilt-rotor aircraft development.



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