Bonjour à tous
For the two rotors and the bicycle-like wheel : The SANTOS DUMONT Hélicoptère 1906 .
I don't know much about it : It was built to perform the first "un kilomètre en circuit fermé" 50 000 F challenge of Deutsch & Archdeacon .The challenge was won by Farman two years later .
It had two rotors and a propeller .
Last edited by richard B; 30 April 2012 at 02:16 AM.