Aerosledge

An Aerosledge (Russian: aэросани, "aerosani") is a propeller-driven sledge, sleigh or toboggan which slides on runners or skis. Aerosleds are used for communications, mail deliveries, medical aid, emergency recovery, and patrolling borders in countries such as northern Russia, as well as for recreation. Aerosani were used by the Soviet Red Army during the Winter War and World War II.

The first aerosledges may have been built in 1903–05 by Sergei Nezhdanovsky. In 1909–10, young Igor Sikorsky designed and tested an aerosledge, before going on to build multi-engine airplanes and helicopters. They were light plywood vehicles on skis, powered by used vintage aircraft engines and propellers.