UTI-6 (NV-6) by V.V.Nikitin

15k b/w NV-6 biplane as seen at "History of aircraft construction in the USSR", Vol.2 p.96

Aerobatic/trainer biplane with 8° swept upper wing and straight lower wing (carrying the ailerons). Engine was equipped with inverted flight carburetor designed by M.A.Kossov. NV-6 was of mixed construction: fuselage frame of chrome-molibdenium steel tubes, wing structure - wood, tail - aluminum. Fabric skin except the nose section. Center section of the fuselage and lower wing used those of the NV-1 aircraft. Estimated g-load was 13 (A_k).

Aircraft was built at OKB-30 in 1939 under Osoaviakhim order, but had to wait for more than a year for the engine to be delivered(December 1940). Flights were performed by V.V.Nikitin and V.V.Shevchenko during winter 1940/ 1941. Aircraft behaved well, but TsAGI did not allow official trials before static tests carried out.

Paperwork took a long time to finish, and on June 22, 1941 the war put the end to NV-6 development.