The experimental fighter RK-I

Under the management of GI Bakshaeva in 1937, was created by a pilot plane having a sliding wing in flight variable space. Aircraft was given the designation of the Republic of Kazakhstan ("Sliding wing"). At 11.3 m wing span aircraft had a relatively small area — 16.52 m2. During the landing on each side, in the direction of the fuselage, the wing was coming 6 telescopically movable concentric sections, increasing the total area of up to 23.85 meters. Section were made of plywood. Used for moving apart rope hand drive from the cabin. With all of this in-flight section moved more easily than on the ground. For a complete withdraw-needed 30-40 seconds, sliding the — 20-30 seconds.

In the test report indicated that the control mechanism of the wing compartments paid off. Design recognized promising. The introduction of such a wing gave the opportunity to significantly increase speed, there was a burning for military aircraft.

Plane also had a number of other those curious. solutions. For example, water-cooling radiators "drowned" in the tail of the board in a more successful place from the standpoint of efficiency cooling and aerodynamics. The chassis was cleaned by the regular cleaning of the kinematic scheme.

To establish a world record speed Bakshaeva in 1938, a new aircraft project "Sliding wing" Curb engine M-105. Most design speed is 780 km / h The project is approved, and at the end of 1938 the People's Commissariat of the aviation industry has given those. job creation of the Republic of Kazakhstan in the single-seat fighter version of a design speed of 800 km per hour and the engine M-106. The fighter was given the designation RK-I (RK-800).

Although at first appeared with the industrial base of the problem, over time, they managed to solve — the construction of the airframe was conducted in TsAGI. Layout of the aircraft lined up and flushed into full-scale tunnel TsAGI in 1940. TsAGI gave generally positive conclusion, but it was noted that the compound sliding compartments were not watertight and therefore acquired Cy max was somewhat less taken for the calculation and the purge of the scale model (1:5).

The design of the aircraft was mixed. The fuselage was a semi-monocoque duralumin, which has open sections of the frame. The wings were made of sheet steel 30KhGSA and consisted of a 2-panels (top and bottom) connected between a roller electric welding. Bays sliding wing (15 on each side) consisted of a sock (duralumin) and the frame, which role do ribs. According to the ribs was fabric covering. Weight sections — about 330 pounds (12 kg/kv2).

The compartments of the wing could dislodge and move apart, it is retracted into the side of the fuselage with a rope drive from the electric motor. Last rib, which closed the board, served with all this push the wing endplates. Flaps and ailerons on the rear tandem wing, empennage also made of aluminum. Managing tough. SINGLE retractable landing gear, "hid" in the fuselage back, rotating, tail wheel well cleaned. The supplies of fuel was calculated by 2.45 hour flight. Armament — 2 ShVAK gun and 2 machine guns ShKAS. Main dimensions: length 8800 mm, wingspan 8200 mm tandem wings, area 11.9 m2, 28.0 m2 push the wing at an elongation of 2.4, the estimated flying weight of 3100 kg with a specific load on the wing 260 kg/m2 and 108 kg/m2.

Recognizable Russian aviation historian Shavrov VB The official reasons for the fact that the RK-I was not passed in the state. tests, as it was foreseen to government job, finds the following:

"But slider M-106 to date has not been released, the end of the assembly was delayed because it was not passed to the tests. Bakshaeva GI even before the war was transferred to the mass creation of the U-2 because it was considered more important. "

It should be noted that slider VK-105P remains as it was in huge numbers to their weight and size characteristics of the engine to match the VC-106, and the power conceded to him nekordinalno (1050 vs. 1200 hp). In any case, the speed properties of the fighter through the least resistance, which provides a unique scheme of the sliding wing surpassed the Yak-1, SC-2 aircraft and other structures.

Huge doubtful and placement of the U-2 as a more principled than the RK-I, which is especially surprising against the background of the backlog of serial fighters of the USSR, including engines with VK-105P from new enemy fighters, for example Bf.109F.

Designed, but not created by the RK-I variant having two engines and two screws at the front and rear tail. Such a variant of the design increment would greatly speed the already high-speed RC-I.

Aircraft performance characteristics:
Modification — RK-I;
Wingspan — 8.20 m;
Length — 8.80 m
Area wing (cleaned / uncleaned) — 11.90 m2/28, 00 m2;
Normal take-off weight — 3100 kg;
Motor type — 1 piston engine M-106;
Motor power — 1200 hp;
Most speed — 780 km / h;
Flight duration — 2.5 hours;
Armament:
— ShVAK two guns caliber 20 mm;
— two machine guns ShKAS 7.62 mm;
Crew — 1 person.

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