made of a basic steel frame and powered by a 27-hp engine. it introduced the concept of co-axial contrarotating rotors.
Ka-8 Irkut was built in 1946. It was the first single-place helicopter built in USSR. It was performed on July,25,1948 at the Tushino airfield in Moscow during the airforce parade. This coaxial aircraft was powered with 38 hp motorcycle engine(BMW_Licenc!). Newspapers called it The Sky Motorcycle. After this aircraft made its successful flights Nikolai Kamov was ordered to design the new helicopter for Soviet Navy.