Mi-4
Type Description
The Wikipedia entry provides details of the design and development history of the Type.
Milestones Associated with the Mi-4
April 30, 1952
Mi-4 :
First flight of the prototype of the Mil Mi-4 Type series
December 14, 1958
Z-5 :
First flight of Harbin Z-5, the Chinese 1st generation helicopter
August 20, 1963
Z-5 :
'Second first flight' of the Harbin Z-5
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