Nikitin-Shevchenko IS-2
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Nikitin-Shevchenko IS-2

Intended as the series version of the IS-1 polymorphic single-seat fighter, the IS-2 embodied some aerodynamic refinement, but, flown early in 1941, did not incorporate the results of the flight testing of its predecessor. The principal changes introduced by the IS-2 were replacement of the M-63 engine by a similarly-rated, but smaller-diameter, Tumansky M-88 14- cylinder radial; replacement of two of the four 7.62mm guns by 12.7mm weapons and re-design of the tail surfaces, including introduction of a cantilever tailplane. Realisation that the variable-geometry arrangement would be difficult to maintain under wartime conditions and the fact that battle damage to the actuating mechanism would inevitably prove disastrous, coupled with the comparatively low level speed performance attainable, led to the discontinuation of development of the Istrebitel' Skladnoi upon the commencement of the German assault on the Soviet Union. A more advanced model, the IS-4, was abandoned without flight testing.

Nikitin-Shevchenko IS-2A three-view drawing (1650 x 1123)

    Wingspan8.60 m28 ft 3 in
    Length7.10 m23 ft 4 in
    Max. speed507 km/h315 mph

Mike West, 12.02.2012

I find the NS series delightful, but when you see just how little extra lift is generated by the biplane configuration, you wonder why he bothered. Fundamentally, the biplane configuration provides much more structural benefit than lift, so it's no surprise that the NS series was a dead end.

, 18.06.2011

Nikitin-Shevchenko IS-2

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