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

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

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.

Predecessors	Modifications
I-2	I-2'

References	Links
"History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.356-357;	I-2bis at Virtual Aircraft Museum I-2, Grigorovich

Technical data

Type

I-2bis

Function

Fighter

Year

1926

Crew

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

58.0kg/m²

Power load

3.9kg/hp

Speed at 0m

235km/h

Landing Speed

95km/h

Landing Roll

210m
16sec

Takeoff Roll

160m
11sec

Turn time

16sec

Range

600km

Flight Endurance

2.5h

Ceiling

5340m

Climb

1000m

2.4min

2000m

5.5min

3000m

9.6min

4000m

15min

5000m

25min

Armament

Guns

2*7.62mm PV-1

Created January 25, 1996
Modified August 26, 1998
by Alexandre Savine;

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