Akaflieg Stuttgart F.1
The Akaflieg Stuttgart F-1 Fledermaus (Bat) was a glider designed and built in Germany from 1932. Development. 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 fuselage was curved to follow the downwash from the wing and rested solely on a single large skid under the forward fuselage, not having a tail-skid. The completely enclosed cockpit included a hanging control column, to simplify the control  run, and airbrakes, for use on the ground, using the cockpit canopy. 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.