The Antonov A-40 Krylya Tanka (aka the Antonov KT), a World War II-era attempt by the USSR to create a tank that could, when dropped from an airplane, glide onto battlefields with crew aboard. Well, necessity is the mother of invention…

Scans from The World’s Worst Aircraft.

Entries done for the Narkomtiazhprom, an architectural contest held to determine the design of the People’s Commissariat of Construction of Heavy Industry in 1930s Russia. Don’t remember what I scanned them from.