The Mil Mi-3 was a Soviet light-utility helicopter originally designed in the 1960s as a heavier and larger version of the Mil Mi-2 helicopter.
It is also a Russian designation for the Polish-Soviet co-operation on larger helicopters based on the Mi-2 that could replace the Mi-4 from 1971.
The project never passed the stage of design.
Due to problems in this cooperation, the Poles decided to build a completely new helicopter on their own, designated as PZL W-3 Sokół.
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