| General Information | |
|---|---|
| Type | IS-4 |
| Function | Experimental Fighter |
| Year | 1941 |
| Crew | 1 |
| Powerplant (projected) | |
| Type | M-120 |
| Power | 1650hp |
| Powerplant (installed) | |
| Type | AM-37 |
| Power | 1400hp |
| Size | |
| Length | ?m |
| Wingspan | 8.6m |
| Wing area (biplane) | 20.83m2 |
| Wing area (monoplane) | 13.0m2 |
| Weights and loads | |
| Empty | kg |
| Loaded | 2900kg |
| Wing load (takeoff) | 139 |
| Wing load (cruise) | 223 |
| Power load (kg/hp) | 2.07 |
| Speed (monoplane) | |
| Maximum | 720km/h |
| Speed (biplane) | |
| Maximum | 436km/h |
| Landing | 107km/h |
| Range | |
| Practical | ?km |
| Ceiling | |
| Ceiling | 12500m |
| Payload | |
| Fuel | ?kg |
| Guns | |
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2*20mm ShVAK 2*12.7mm UBS |
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IS-4, V.V.Nikitin, V.V.Shevchenko
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Development of the IS-2. Switching from radial to liquid cooling Vee engine (M-120), enclosed cockpit, very clean lines promised good results. Expected top speed was expected of 720km/h! Unfortunately, as often happens, the engine didn't materialize, therefore designers installed mass-built AM-37 engine. New aircraft carried also more powerful armament. Drawing shows two different designs of IS-4.One above is an original outline and one below was built and flown.
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The IS-4 was apparently flown sometime late 1940 or early 1941, but the flight records were lost in the German invasion.
Additionally, even though Nitikin created up as much as he could of the airframe and related equipment of his experimental design bureau, no trace of the airplane survived the hurried evacuation.
As the press of events forced the Soviet aircraft industry to concentrate upon conventional designs which could be produced in greater numbers in a short period, and the fact that apparently the IS-4 had some rather unusual handling characteristics, further work was halted.
| References | Links |
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| Created November 25, 1996 Modified February 02, 2000 |
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