Derived from B 131 Jungmann, a light 2-seat biplane developed for school and other training purposes. Designed 1936 as "sporting" aircraft under terms of Versailles Treaty, was in reality an advanced trainer for then embryo Luftwaffe. Jungmeister (young master) considered to be one of all-time greats in field of aerobatic competition. Its more powerful engine and overall design made it an outstanding success as aerobatic aircraft prior to war, and it won international competitions in Germany, Holland, France, Switzerland, Romania, and US. C model was being produced in 1945 and F model in 1969.