Formed in 1933 by Heinrich Focke, formerly of Focke-Wulf, and aerobatic pilot Gerd Achgelis. Developed world's first completely successful helicopter, Fw 61, flown as a prototype on June 26,1936. Also designed Fw 186 Argus As 10C-engined autogyro to similar requirement that had produced the Fieseler Storch. Twin-rotor Fa 223 Drache, first flown August 1940, ordered into production 1942 at Hoyenkamp factory, later at Laupheim; in 1945 a captured Drache became first helicopter to cross English Channel. Fa 330 Bachstelze rotor kite deployed operationally aboard U-boats from 1942.