An aerosan (Russian: aэросани, aerosani, literally 'aerosled') is a type of propeller-powered snowmobile, running on skis, used for communications, mail deliveries, medical aid, emergency recovery and border patrolling in northern Russia, as well as for recreation. Aerosans were used by the Soviet Red Army during the Winter War and the Second World War.
The first aerosans may have been built by young Igor Sikorsky in 1909–10, before he built multi-engine airplanes and helicopters. They were very light plywood vehicles on skis, propelled by old airplane engines and propellers.
Military use of the aerosan goes back to at least the 1920s. During the 1939–40 Winter War against
During WWII, aerosans were found to be useful for reconnaissance and light raiding in northern areas, thanks to their high mobility in deep snow (25–35 km/h, where many vehicles couldn't move at all). Responsibility for aerosans was transferred to the Soviet Armoured Forces (GABTU) and orders were submitted for design and fabrication of lightly-armoured versions, protected by ten millimetres of steel plate on front.
I tried my own scratchbuild version for the Germans: