What is Mil Mi-4?
{|{{Infobox Aircraft Begin |name = Mil Mi-4 |image = File:Mil Mi-4 AN2098119.jpg |caption = <center>[[Aeroflot]] Mil Mi-4</center> }}{{Infobox Aircraft Type |type = Transport helicopter |national origin = [[Soviet Union|USSR]] |manufacturer = [[Mil]] |first flight = 3 June 1952 |introduced = |produced = |status = Retired |primary user = [[Aeroflot]] (former) |more users = [[Soviet Air Force]]<br>[[Polish Air Force]] |number built = +4000 |unit cost = |developed from = |variants with their own articles= [[Harbin Z-5]] }} |} '''Mil Mi-4''' (Russian: Мил Ми-4; NATO reporting name: '''Hound''') is a [[Soviet Union|Soviet]] transport helicopter that first flew in 3 June 1952. {{commonscat}} [[Category:Soviet military aircraft]] [[Category:Helicopters]] {{transport-stub}}