The Mi-12 had a "wingspan" of 219 ft 9 in (67 metres), or nearly 15 ft wider than a Boeing 747. It had no tail rotor but a tail rather like a fixed-wing aircraft.
It was designed around two Mi-6 power units (total of 4 engines with 26,000 shp combined output), transmissions and rotor systems forced to fly side by side in close formation. Its max takeoff weight was quoted as 231,485 lbs (105,000 kgs).
It first flew in 1968 and I believe that although three prototypes were built it never went into production.
It wasn't any good at confined areas (although areas probably weren't "confined" for long once it arrived) and it went rusty as they couldn't get it in the hangar. I think it once blew the ATC tower over as it hover-taxied past
I think there is one example in a Russian museum.
TC, I think John Holmes probably died from a lack of blood to the brain. Whatever it was, they had one heck of a job getting the coffin lid on
