Bisnovat SK-2 (Skorostnoye Krylo)

History

Like other great powers in the late interwar period (i.e. the period between the two world wars), the Soviet Union worked hard to develop an entirely new monoplane wing plan to increase the number of machine guns on front-line fighters. The Central Institute of Power and Fluid Dynamics (TsAGI), headed by Matus Bisnovat, carried out research in the area involving the 1939-1940 high-speed monoplane Speedster SK/SK-1 ("Skorostnoye Krylo"), and this work was used to develop A combat-capable monoplane named after him - Bisnovat "SK-2".

While working as an aeronautical engineer at OKO in Kyiv, Ukraine, Bisnovat has acquired the necessary knowledge and was eventually approved to establish his own design office (OKB) to expand the project.

Like the original SK, the SK-2 sought to achieve comprehensive design improvements, not only using an all-new small-area wing plan, but ensuring the smallest and most efficient fuselage effectively accommodated the linear piston engines of the day. The aircraft is equipped with a Klimov M-105 (VK-105) 1,050 hp 12-cylinder in-line engine driving a three-blade nose propeller - the engine is housed in a compact, flat space to maintain the aircraft's streamlined efficiency. Pilot's position Remaining low close to the fuselage and in the design aft, the dorsal ridge meets the bottom of the single rudder tail fin. The "trailer" landing gear is hydraulically controlled and fully retractable.

The main plane with a rounded tip, straight leading edge and tapered trailing edge was placed low and forward in the center of the boat to create a balanced flight platform. The entire aircraft layout uses an all-metal structure including light alloy skins, although the tail control surfaces are covered in cloth.

In its probable combat form, the aircraft is recommended to carry a minimum of 2 x 12.7mm BS Heavy Machine Gun (HMG) and possibly 1 x 7.62mm Medium Machine Gun (MMG) in the engine cowling, increasing firepower for the day threat.

Once completed, the SK-2 flew for the first time in October 1940 (as WWII continued) and performed well. However, the benefits derived from this advanced design were not sufficient to replace the current form of fighter design in Soviet aircraft stabilization.

Therefore, as the war progressed, the Sk-2 project was abandoned.

Performance specifications captured for the SK-2 fighter design include a top speed of 413 mph and a rate of climb of 3,785 feet per minute excellent characteristics for an early wartime fighter.

Specification

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