Technical data
Type I-2bis
Function Fighter
Year 1926
Crew 1
Engines 1*400hp M-5
Length 7.32m
Wingspan 10.8m
Height 3.0m
Wing area 23.4m2
Empty weight 1152kg
Loaded weight 1575kg
Wing Load (kg/m2) 58.0
Power load (kg/hp) 3.9
Speed at 0m235km/h
Landing Speed 95km/h
Landing Roll 210m
Takeoff Roll 160m
Turn time 16sec
Range 600km
Flight Endurance 2.5h
Ceiling 5340m
1000m 2.4min
2000m 5.5min
3000m 9.6min
4000m 15min
5000m 25min
Guns 2*7.62mm PV-1

I-2bis, I-2' by D.P.Grigorovich

18k b/w I-2bis series fighter, "History of aircraft construction in the USSR", Vol.1 p.356

To overcome problems of the I-2 pilot's seat was raised. Cockpit opening enlarged. Engine cowling redesigned, some cockpit equipment added. Wielded steel tube frame was added to central and front fuselage sections. Construction turned very strong, but heavy and sophisticated.

In August and December 1926 static tests were performed and modified aircraft was found fulfilling all requirements. The only change was new design of wing struts. This aircraft became first Soviet indigenous fighter built in substantial numbers. Factories Number 1 and Number 23 built 164 and 47 aircraft correspondingly during 1926- 1929.

Due to insufficient assembly quality series I-2bis had speed 220...242km/h. Cooling problems raised again, and few aircraft carried additional Lamblen type radiators between landing gear struts. Those were designated I-2' (I-2prim) and had even lower performance than I-2bis.

Installation of 450hp Lorraine-Dietrich was rejected because engine's oversize cross-section.



  • "History of aircraft construction in the USSR", Vol.1 p.356-357;
  • I-2
  • I-2bis at Virtual Aircraft Museum
  • I-2, Grigorovich

  • Created January 25, 1996
    Modified August 26, 1998
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