The B-12 (also known as the Mi-12, NATO reporting name: Homer) is the heaviest and most powerful helicopter ever built in the world.It was developed as a super-heavy transport helicopter with a lifting capacity of at least 30 tons for transporting components of intercontinental ballistic missiles. The helicopter made its first flight on June 27, 1968, under the control of test pilot V. P. Koloshenko. On August 6, 1969, the B-12 lifted a load of 44,205 kg to a height of 2,255 m, setting a world record for lifting capacity. Only two B-12 helicopters were built, one of which is stored on the territory of the Mil Moscow Helicopter Plant in Panki, and the second is in the aviation museum in Monino.