Otto Onigkeit from Magdeburg built four monoplanes before the War; the last one, built in 1914. It was powered by a 50 hp RAW engine.
After the War, in 1921-1923, he built a man-powered plane with crashed at it first taking off in 1923. Otto Onigkeit was heavily injured.
In 1924 he built a little biplane which he flew until 1935.
In 1925-1926 he built a monoplane.
At last, in 1938, he built a new man-powered plane, propelled by pedal-driven swinging trailing edge surfaces, which flew several times.
All Aero 