Nikitin NW-2

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Nikitin NW-2
f2
Type: Trainer aircraft
Design country:

Soviet Union 1923Soviet Union Soviet Union

Manufacturer:

Nikitin

First flight:

1935

Production time:

1935-1939

Number of pieces:

about 150

The Nikitin NW-2 ( Russian: Никитин НВ-2 ) was a single-seat , low -wing trainer aircraft designed by the Soviet designer Vasily Nikitin and built in 1935 with funds from OSSOAWIACHIM at Moscow's MAI ( OKB -30). Like all versions derived from it, this machine had very good flight characteristics and was successfully tested. Due to the excellent test results, a total of up to 150 machines of this type and its variants should have been built.

history

W. W. Nikitin and his colleagues continued to develop the NW-1 between 1935 and 1939 in order to provide a fully-fledged training and training fighter aircraft for the Soviet air force . During this time, three improved variants were created. They were the types NW-2, NW-2bis and the NW-2bis / MG-31 (also referred to as UTI-5). By constantly improving the design and using various aircraft engines, the collective around W. W. Nikitin succeeded in developing an aircraft that was on a par with, if not superior to, the first series of I-16s built by N. N. Polikarpow . It was also very similar to the I-16 in appearance. Compared to its predecessor, the NW-2 represents a major step forward in the development of trainer aircraft in terms of its overall concept. However, due to a lack of production capacity, it could not find a permanent place in the training units of the Soviet air force.

construction

NW-2

The Nikitin NW-2 was a direct further development of the NW-1 . The basic concept was a low wing construction in mixed construction without bracing the wings to the fuselage. The fuselage was assembled in monocoque construction (shell fuselage), as with all the following samples . By lengthening the fuselage by 1.90 meters, it was heavier than the NW-1. Due to the fact that the same engine was used, the performance could not be improved. Despite the elongated hull, the curb weight increased only marginally by 35 kilograms. The flight mass increased considerably with this design, however, as up to 250 kilograms of fuel could now be carried, thereby improving the flight duration and range. The wing area has increased by almost a third and its shape has been revised. The pilot's cockpit was pulled forward a few inches and was now over the center of the wing roots. This gave the pilot a better view downwards. This was very important, especially when landing. The capacity of the fuel tanks has been increased by more than three times. The sprung landing gear could be retracted to the rear in two special landing gear fairings underneath each wing. The wheel remained in its upright position (seen in the direction of travel) and was not driven sideways into the fuselage, as in many later aircraft types. The NW-2 was also partially flown with the cabin closed. The 5-cylinder Schwezow star engine was covered with a NACA hood .

NW-2bis

The Nikitin NW-2bis should achieve better flight performance as a follow-up variant. It was equipped with a 65 hp more powerful MG-11 engine. The flight mass increased by 50 kilograms when the engine was installed, but the top speed was increased by 30 km / h. The machine successfully passed the state tests in 1938. The Soviet Air Force ordered ten machines, but their construction was postponed due to the production of the Yakovlev UT-2 in OKB 30 and ultimately not realized.

NW-2bis / MG-31 (UTI-5)

The aircraft was further improved by the installation of an MG-31 engine, which produced almost twice the power of the MG-11. To ensure that this more powerful engine can be accommodated, the NW-2bis cell was reinforced in the front area. The name of this variant was NW-2 to / MG-31, but it was done for convenience as UTI-5 (not to be confused with the two-seater La-5 variant of S. A. Lavochkin , which at the Air Force as UTI-5 was designated ). This aircraft was flown by more than 40 pilots from the Research Institute of the Air Force (GWF) and the Ossoawiachim; all confirmed the excellent performance of this type after the tests were successfully completed in 1939. A total of 20 machines were ordered, but not built due to a lack of production capacity.

use

School and training fighter aircraft

Technical specifications

Parameter NW-2 NW-2bis NW-2bis / MG-31 (UTI-5)
crew 1
length 6.15 m 6.30 m
span 8.60 m 8.00 m
Wing area 11.00 m² 11.00 m² 11.00 m²
payload 365 kg 390 kg
Empty mass 385 kg 435 kg 560 kg
Takeoff mass 750 kg 800 kg 950 kg
Wing loading 68 kg / m² 72.7 kg / m² 86 kg / m²
Landing speed 75 km / h
Top speed 230 km / h 260 km / h 350 km / h
Service ceiling 5800-6100 m 7000 m 8000 m
Range 780 km 780 km
Flight duration 10 h (?) 7 h (?) 4.5 h
Engine 5-cylinder radial engine Schwezow M-11 MG-31 radial engine
power 100 hp 165 hp 300 hp
Armament - - 1 × SchKAS -MG with 250 shots

literature

  • Wilfried Copenhagen : Lexicon Soviet Aviation. Transpress, Berlin 1986, ISBN 3-344-00005-5 .
  • Шавров В.Б, История конструкций самолетов в СССР 1938–1950 гг 3-е изд., Исправл. - М .: Машиностроение, 1994
  • Vaclav Nemecek: Soviet planes . Luftfahrtverlag Walter Zuerl, Steinebach / Wörthsee 1969.

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