| 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 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 |
I-2bis, I-2' by D.P.Grigorovich
|
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.
| Predecessors | Modifications |
|---|---|
 I-2 |
I-2' |
| References | Links |
|---|---|
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