Instead of loading light tanks onto gliders, as other nations had done, Soviet airborne forces had strapped T-27 tankettes underneath heavy bombers and landed them on airfields. In the 1930s, there were experimental efforts to parachute tanks or simply drop them into water. During the 1940 occupation of besserbia , light tanks may have been dropped from a few meters up by TB-3 bombers, which, as long as the gearbox was in neutral, would allow them to roll to a stop.
The biggest problem with air-dropping vehicles is if their crews are dropped separately, and may be delayed or prevented from bringing them into action. Today's Russian Airborne VDV has specially cushioned seats in their BMD family of light tanks with which drivers are inside them when dropped. Gliders allow crews to arrive at the drop/landing zone along with their vehicles. They also minimize exposure of the valuable towing aircraft, which need not appear over the battlefield. So the Soviet Air Force ordered Oleg Antonov to design a glider for landing tanks