The Jungmann was the first product of Bücker Flugzeugbau and flew for the first time in April 1934 as a compact trainer build by classic double decker formula with an open two-persons cockpit in a with fabric covered casco of steel pipes.
The type came in production as the Bü 131A with the same 60 kW Hirth HM 60R air-cooled line-engine that had powered the prototype. While the improved Bü 131B was fitted with the Hirth HM 504A-2 (78 kW)
Bücker exported the 131 Jungmann on a large scale and in Japan more than 1250 were produced as the Watanabe Ki-86 and K9W.
To be able to foresee in the demand for the Bü 131, Bücker opened a second factory where the design-team of the company developed the almost identical single-seater Jungmeister for further flight-training.
Bücker Bü 131B Jungmann: