Antonov A-40 Krylya Tanka (meaning "tank wings") was a Soviet attempt to allow a tank to glide onto a battlefield after being towed aloft by an airplane, to support airborne forces or partisans. A prototype was built and tested in 1942, but was found to be unworkable. This vehicle is sometimes called the A-40T or KT. One T-60 was converted into a glider in 1942, intended to be towed by a Petlyakov Pe-8 or a Tupolev TB-3. The tank was lightened for air use by removing its armament, ammunition and headlights, and leaving a very limited amount of fuel. Even with these modifications, the TB-3 bomber had to ditch the glider during its only flight, on September 2, 1942, to avoid crashing, due to the T-60's extreme drag (although the tank reportedly glided smoothly). The T-60 landed in a field near the airport, and after dropping the glider wings and tail, the driver returned it to its base. Due to the lack of a sufficiently powerful aircraft to tow it at the required 160 km/h (99 mph), the project was abandoned.