It was powered by two 140 hp Shvetsov M-11F radial engines driving two-bladed wooden propellers, with the engine installation based on Yakovlev's UT-2 primary training aircraft. In order to minimise the use of scarce resources, the aircraft's fuel tanks were made of chemical-impregnated plywood rather than metal or rubber.
It was powered by two 140 hp Shvetsov M-11F radial engines driving wooden propellers, derived from Yakovlev's UT-2 training aircraft. The use of scarce resources was minimized by using chemical-treated plywood for the fuel tanks instead of metal or rubber.