Developed in just 8 months, following an order from Stalin in Oct 1951 after evaluation of western helicopter operations in
Korea, the Mi-4 Hound arrived in Apr 1952.
- Hound-A was a troop carrier for the Air Force
- Hound-B was an early Naval ASW model
- Hound-C was initially a close air support model
- Mi-4P was a passenger model introduced by Aeroflot in Nov 1958
- Mi-4L was a VIP transport
- Mi-4S was initially a crop sprayer but became better known in Forestry support.
| C/N | Built as | Year | History |
| 03 97 | | |  CCCP-04358 : Polyarnaya Aviatsiya SSSR-04358 c/n 0397
|
| 04 97 | | | CCCP-04359 : Polyarnaya Aviatsiya SSSR-04359 c/n 0497
|
| 05 69 | | | CCCP-04332 : Polyarnaya Aviatsiya SSSR-04332 c/n 0569
|
| 05 97 | | | CCCP-04360 : Polyarnaya Aviatsiya SSSR-04360 c/n 0597
|
| 06 69 | | | CCCP-04335 : Polyarnaya Aviatsiya SSSR-04335 c/n 0669
|
| 07 114 | | |  HR-1 : On display at Central Finland Aviation Museum, by 1984 +
|
| 07 69 | | | CCCP-04333 : Polyarnaya Aviatsiya SSSR-04333 c/n 0769
|
| 08 69 | | | CCCP-04336 : Polyarnaya Aviatsiya SSSR-04336 c/n 0869
|
| 09 114 | | | HH-3 : On display at Finnish Aviation Museum by 1988
|
| 09 69 | | | CCCP-04334 : Polyarnaya Aviatsiya SSSR-04334 c/n 0969
|
| 11 159 | | | CCCP-35242 : Polyarnaya Aviatsiya SSSR-35242 c/n 11159
|
| 12 159 | | | CCCP-35243 : Polyarnaya Aviatsiya SSSR-35243 c/n 12 159
|
|  | | |  Z331 : preserved at Jorhat AFS memorial by 2000, still 2008.
|
13 C/N. 
Harbin Z-5 
