Although many tried before him, Igor Sikorsky invented and flew the world's first helicopter in the 1930's. And with Rex Beisel he co-invented the Vought F4U Corsair fighter used by the Allies in the...
Sikorsky was an aircraft engineer and only peripherally involved with snow vehicles. the famous S-l7 which was in effect a long-range patrol bomber and could be used and was, as a spy plane had...