Image:HE2G8.jpg
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[edit] Summary
In 1907, the French inventor Paul Cornu made a helicopter that used two 20-foot (6-meter) counter-rotating rotors driven by a 24-hp (18-kW) Antoinette engine. It lifted its inventor to about five feet (1.5 meters) and remained aloft one minute.
[edit] Source
http://www.centennialofflight.gov/essay/Rotary/early_20th_century/HE2G8.htm
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- (del) (cur) 21:14, 4 January 2007 . . Signaleer (Talk | contribs) . . 504×157 (27,573 bytes) (In 1907, the French inventor Paul Cornu made a helicopter that used two 20-foot (6-meter) counter-rotating rotors driven by a 24-hp (18-kW) Antoinette engine. It lifted its inventor to about five feet (1.5 meters) and remained aloft one minute. ==Source=)
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