The Akaflieg Stuttgart fs16, nicknamed Wippsterz (German: Wagtail) was a glider aircraft that was designed and built in Germany from 1936.
Akaflieg Stuttgart wanted to build a glider with reasonable performance that was safe and simple to fly, the result was the fs16.
It had no tail-skid, using a single large skid under the front fuselage with a spur extending rearwards for support and stability on the ground.
Flight characteristics with the rotating wing-tip panels were not as expected so a conventional vertical fin on an extended rear fuselage, and ailerons constructed from fabric-covered Duralumin on the outer wing trailing edges, were added after initial flights.
Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944[1]General characteristics Performance