The Russian Mil Mi-24 helicopter has had a large number of variants.
The Mi-24 (Russian: Миль Ми-24; NATO reporting name: Hind) went from drawing board in 1968 to first test-flights in less than eighteen months. The first models were delivered to the armed forces for evaluation in 1971. The Hind-A did have a number of problems: lateral roll, weapon sighting problems, and limited field of view for the pilot. A heavy redesign of the aircraft front section solved most of these problems.
Mi-24A
Iraqi Mi-24D Hind-D captured during the Gulf War.
Mi-24D cockpit.
Soviet Mi-24V Hind-E
Mi-24W(V) of Polish Army
Mil Mi-24P Hind F with East German markings
Mil Mi-PSV at MAKS 2015