Mil V-12: The Story Of The Largest Helicopter Ever Built

The largest helicopter ever built was the Soviet Union prototype designed in the mid-1960s. The prototype performed its first successful flight in July 1968. The Mil V-12 had the potential to change air travel forever. For a number of reasons, the gigantic helicopter fell far short of its lofty promises but gave engineers a unique window into the world of large-scale rotorcraft.