Sportavia-Pützer SFS 31 Milan

The Sportavia-Pützer SFS 31 Milan is a single-seat motor glider that was produced in Germany in the early 1970s.

Design and development
The Milan was created by essentially combining the fuselage of the Fournier RF 4 with the wings of the Scheibe SF-27. The resulting aircraft is a conventional motorglider design, a low-wing cantilever monoplane with a nose-mounted engine. The undercarriage consists of a single retractable mainwheel, a fixed tailwheel, and an outrigger under each wing. Construction is of wood, skinned in plywood and fabric. The designation was created by combining the initials of the manufacturers involved (Sportavia-Pützer, René Fournier (aircraft designer), and Scheibe), and adding the sum of the model numbers of the two constituent aircraft designs.

The SFS 31 prototype (registered D-KORO) first flew on 31 August 1969 and soon replaced the RF 4D in production at Sportavia-Pützer. In 1971, Hans Huth piloted an SFS 31 to third place in the German national motorglider competition.