The 'F.1' was the first glider designed and built at Akaflieg Stuttgart (Akademische Fliegergruppe) using a wind tunnel and innovative thinking.
As built, the F.1 had no vertical tail, using rotatable wing-tip panels for roll and yaw control.
The F.1 entered its first competition at Rhön in 1933, but the technical committee insisted that the glider be given a conventional vertical tail, despite protests that the F.1 had already flown a 300 km distance task as built.
The fliegergruppe acquiesced and built a vertical tail overnight, with the F.1 claiming several prizes during the competition.
Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944[1]General characteristics Performance