Breguet and René Dorand established Syndicat d'Etudes du Gyroplane 1931, building Gyroplane Laboratoire coaxial helicopter. Flown November 1933, regarded in France as first fully successful helicopter.
Breguet and René Dorand established Syndicat d'Etudes du Gyroplane 1931, building Gyroplane Laboratoire coaxial helicopter. Flown November 1933, regarded in France as first fully successful helicopter.