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| Keywords: HE2G13.jpg Cornu helicopter Paul Cornu in his first helicopter in 1907 Note that he is sitting between the two rotors which rotated in opposite directions to cancel torque This helicopter was the first flying machine to have risen from the ground using rotor blades instead of wings ca 1907 http //www centennialofflight gov/essay/Rotary/early_20th_century/HE2G13 htm The U S Centennial of Flight Commission <br /> Transferred from http //en wikipedia org en wikipedia Unknown <br /> © 2001 Smithsonian Institution National Air and Space Museum Videodisc 2B 5847 PD-USGov PD-USGov original upload log page en wikipedia HE2G13 jpg 2007-01-04 21 10 Signaleer 327×432× 47053 bytes <nowiki>Paul Cornu in his first helicopter in 1907 Note that he is sitting between the two rotors which rotated in opposite directions to cancel torque This helicopter was the first flying machine to have risen from the ground using rotor blades instead of win</nowiki> Paul Cornu Paul Cornu helicopters | ||||
