A flying tank, Antonov A-40, was designed by Oleg Antonov. Its idea was to be released from a plane, most likely a TB-3 bomber, and glide down right into the battlefield. Upon landing, the flying wing for the tank would immediately be detached. The A-40, however, was not ever used in battle, although the one-third scale prototype worked very well.
The MiG-8, a top secret Russian experimental aircraft which led to the development of the MiG-15, was claimed to be a trainer aircraft.