What Stalin wanted, Stalin got, gravity be damned. No evidence the thing actually worked, even with the one “photo” taken of it. Via Wikipedia:
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The Antonov A-40 Krylya Tanka (Russian: крылья танка, meaning “tank wings”) was a Soviet attempt to allow a tank to glide into 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.
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 Bessarabia, light tanks may have been dropped from a few meters by TB-3 bombers, allowing them to roll to a stop with the gearbox in neutral.