The experimental high-speed aircraft SC-1, SC-2

In the second half of 1930 in all the countries that have developed aviation markedly activated research and practical work, the main aim of which was to search for ways to increase speed of aircraft of various missions. During these operations practiced new schemes aircraft different assembly airfoil. Built experimental aircraft and experienced. In the middle of these vehicles that have been specially designed for the study of real flying at tremendous speeds the wings with different profiles, and general dynamic parameters of the aircraft with the highest specific loads on the wing, and was the UK. The aircraft developed a team of professionals TsAGI (Central Aero-Hydrodynamic Institute), which was led by chief designer Bisnovatyi Matus Ruvimovich.

SC-1 — High pilot plane, designed by designer Bisnovatyi MR This machine has been designed and built to study in a real flight wings with different profiles and dynamic parameters with huge loads on the wing. Huge speed using the motor M-105 was achieved by using more advanced aerodynamics, retractable canopy and a large load on the wing. The lantern was inscribed in the contours of the fuselage of the Iron and while landing the drop, forming a canopy, with all this chair was rising up to the pilot hydraulic lift, which ensures the desired visibility. Cantilever wing with a narrow profile NACA-23014, 5 made without connectors in the form of the 1st unit, it can be easy to change. Base Wing — caisson formed the outer skin and spars. Wing cover a thin layer of putty — cork dust on voile, glued to the metal nitrokleem on the ground — phthalic base. The surface of the wings has been polished to a mirror finish. This finish was kept very tight. In the pilot the airplane tried the latest cooling system: radiator area was 0.17 m2, which is almost two times less common, the water circulating in the cooling system pressure of 1.1 kg/cm2. The ailerons and rudders had full weight compensation. Plane first released in 1939. Tests held as non-retractable skis and on a wheeled chassis. First 1940 test pilot Shijanov GM UK tests began.

SC-2 was different from its predecessor conventional flashlight, gear mechanism for emergency drop (lantern on the SC-1 in flight is recessed in the fuselage to reduce drag).

Airframe — metal semi-monocoque with stringers and frames, variable pitch propeller VISH-52. Cantilever wing with a narrow profile NACA-230145 produced in the form of a unit to be replaced, which has no connections (it is possible to reduce the weight of the wing). Wings and frame assembled from a set of aluminum upressovannyh details. Base Wing — caisson formed the outer skin and spars. Wing SC-2 also covered with a thin layer of putty (cork dust on the awning), glued to the metal nitrokleem. The surface of the wings otpolirovyvalas to a mirror finish. This finish is not flaking off and held on tight. For the SC-2 is also used shields TSAGI-Vlasov and the ailerons and rudders had a total weight compensation. The tail wheel was driven to the ground (it enhanced maneuverability on the runway), retractable in-flight (to reduce drag). A single hydraulic served flaps, landing gear and cleaning SINGLE tail wheel.

Thanks to the implementation of the most understated design, the weight of the aircraft came out very low — only 2.3 million kg.

The record-low area of the wing, which stood 9.57 meters? (The smallest area in the middle of Russian fighter then had only the CAM-13) gave a unique higher wing loading of 240 kg / m, very exotic for 1940.

Flight tests were begun 10 November 1940 and lasted right up to the January 10, 1941. Test pilot Shijanov GM At a height of 4.9 km With years speed 660 km / h at sea level — 585 km / h To achieve the required height of 5 km 4 minutes. 20. Landing speed was relatively highest — 170 km / h, but, despite this, the landing, according to the pilots, was normal. The run length — 350 meters, run — only 500 meters. Despite the highest speed and the small size of the wing, SC-2 had a satisfactory take-off and landing characteristics.

The aircraft in the combat version did not elaborate, according Shavrov VB, "as has already conducted mass creation Yak, LaGG and MiG."

The results that were obtained during the development and testing SC-2, proved useful in the design of the upcoming fighter as engines with increased power, increased and specific load on the wing.

The design of the aircraft were used following new features:
— special coating (coating) reduced aerodynamic drag;
load on the wing was very highest (unprecedented for a Russian fighter since) — up to 240 kg / m²;
— controlled (using hydraulics) tail wheel.

We Bisnovatyi MR in 1940 was a project SC-3 — two-seat fighter-nizkoplan with 2 engines AM-37. Wing area was 33.7 m2. All-metal construction. Plane was armed with 4 machine guns mnogokalibernymi motionless. The estimated speed the land — 555 km / h on the estimated height — up to 700 km / h The project was returned for revision. The second time it was considered in December 1940, but was not approved.

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