Technical data
Type G-23 G-23bis
Function Experimental Aerobatic
Year 1937 1938
Crew 1
Engines 1*56hp GAZ-M-60 1*150hp M-11E
Length 6.4m 6.5m
Wingspan 11.0m 10.5m
Wing area 15.0m2
Empty weight 483kg ?
Loaded weight 713kg ?
Wing Load (kg/m2) 44.6 ?
Power load (kg/hp) 11.2 ?
Maximum Speed at 0m 150km/h ?km/h
Landing Speed 65km/h ?km/h
Landing Roll 90m 10sec ?
Takeoff Roll 150m 16sec ?
Range 400km -
Flight Endurance 8h
Ceiling 2480m 7985m
1000m 9.0min 1.5min
2000m 58.0min 3.4min
3000m - 6.0min
Fuel+Oil 40+14kg ?

G-23 and G-23bis by V.K.Gribovskij

Photo from "Russian Civil and Military aircraft 1884~1969", p.134

G-23 was built as a testbed for GAZ-M-1 (GAZ-M-60), car engine modified by E.I.Agapov in 1935. Aircraft construction was similar to the G-22. Radiator tunnel - under the engine, steel propeller.

Trials at NII VVS (until February 26, 1937) proved controversy of the engine choice: poor climb rate, reasonably good speed and very good reliability. Engine was twice heavier than aircraft engine of same power, and aircraft could not be used as an aerobatic.

During July 24-27, 1937 pilot I.Grozdiansky on G-23 made 'endurance' flight Tushino - Kharkov - Zaporozhje - Kacha - Zaporozhje - Kharkov - Oriol - Tushino, covering 2584km in 21h.

The second built G-23 was powered with M-11E (1938) and designated G-23bis. With lighter and much more powerful engine, G-23bis was a great performer. Two international records were set:



  • "Technica Vozdushnogo Flota" magazine, 1937, Vol.4 pp25-29;
  • "History of aircraft construction in the USSR", Vol.1 p.537, pp542-543;
  • ....

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