Mi-12 the heaviest and most Carrying capacity lift helicopter ever built in the world. Despite the progress on carrying capacity, the program has been found to be ineffective, and only two prototypes were built. Currently, one of these machines is an exhibit of Russian Air Force Museum in Monino (Moscow region). The second is in the Moscow suburb of punks in Moscow Helicopter Plant. "
In 2004, the second helicopter was bought forwarded to the West and turned it into a flying hotel.
