April 14, 2009 The Soviet aircraft industry really like building big. We recently reported on the Hotelicopter, a converted Soviet Mil V-12 Heavy Lift Helicopter, which proved to be an April Fools prank. The Russians can still claim the title of world’s largest aircraft, though, with the Antonov AN-225 heavy lift transport, which has a larger wingspan than the Airbus A380. Both of these modern day wonders have still not eclipsed the Hughes H-4 Hercules or “Spruce Goose” for size and we have just unearthed pictures of something the Russians were working on in the 1930s that may have dwarfed even the Spruce Goose.