Assault glider (original project was designated BDP), a wooden high-wing design with accommodation for 20 soldiers and a pilot.
The wheels for take-off were jettisonable; the BDP-2 landed on skis.

BDP: Combat paratrooper's glider. Test in Moscow, Summer 1941.
BDP-2: Test in Novosibirsk at No.153 factory. Winter 1941-1942.