The single rotor layouts also studied proved to be non-viable, leading to the transverse layout chosen for the finished article. ĭesign limitations forced Mil to adopt a twin rotor system but design studies of a tandem layout, similar to the Boeing CH-47 Chinook, revealed major problems. The GKAT directive was followed by a more detailed specification for the V-12 with hold dimensions similar to the Antonov An-22, intended to lift major items of combat materiel as well as 8K67, 8K75 and 8K82 inter-continental ballistic missiles (ICBM). Design and development ĭesign studies for a giant helicopter were started at the Mil OKB in 1959, receiving official sanction in 1961 by the GKAT ( Gosudarstvenny Komitet po Aviatsionnoy Tekhnike - State Committee on Aircraft Technology) instructing Mil to develop a helicopter capable of lifting 20 to 25 tonnes (22 to 28 short tons).

The designation ' Mi-12' would have been the name for the production helicopter and was not applied to the V-12 prototypes. The Mil V-12 ( NATO reporting name: Homer), given the project number Izdeliye 65 ('Item 65'), is the largest helicopter ever built.

What is cccp on heli