Star air-cooled engine, maximum power 587 kW (785 hp) used in the construction of the two-seater Polikarpova UTI-3 (No. 11211). The engine did not go into series production.
Source: Šnajdr, Miroslav: Polikarpov UTI-4; Military Revue No. 2012/02
Source: Šnajdr, Miroslav: Polikarpov UTI-4; Military Revue No. 2012/02