Young Sikorsky with his invention "aerosani", a kind of snowmobile

retro photo of Sikorsky with his snowmobile
Igor Sikorsky with his air sleigh near his house in Kyiv, 1910

You probably know Sikorsky as an inventor of helicopter or for crafting the first four-engine plane. But what is not widely known – is that, tired of non working models of helicopter, he, as a student, invented a kind of snowmobile. And called it “aerosani” (“air sleigh”). Here is the retro photo of him, posing with his invention in Kyiv, 1910