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Sikorsky S-1
1909
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Igor Sikorsky's first attempt at building a helicopter. The airframe was a wire-braced woodencage, enclosing ...
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| Built and tested in February to May 1910, Sikorsky's second helicopter was more sophisticatedthan the ... read more ... |
Sikorsky S-2
1910
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Sorokin helicopter
1909
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Twin-rotor helicopter with tractor propeller. All rotors powered by single 50hp Argus engine. Construction started ...
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| In the very year that Sikorsky was working on his first helicopter, Tatarinov started to ... read more ... |
Tatarinov "Aeromobile"
1909
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Antonov "Helicoplane"
1910
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In 1907 military engineer K.A.Antonov applied for, and in 1912 obtained a patent for his ...
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Yuriev helicopter
1912
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In 1911 B.N.Yuriev (then student) completed development of theoretical concept of the helicopter with single ...
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