Bruno Lange: Typenhandbuch der Deutschen Luftfahrttechnik:
B-24A, double ring wing STOL aircraft, with 2 66kW (90PS) Continental C90. The prototype was under construction at Schempp-Hirth, the development was canceled.
This is the only pohoto of the Binder B-24 I ever saw.
The details I have:
two 90hp Continental C90 piston engines DETAILS: In 1958 Binder Aviatik KG started development of the 4-seat B-24 sport aircraft and a prototype was completed in September 1959. The forward fuselage and the wings were constructed by Schempp-Hirth Flugzeugbau KG and the aircraft underwent ground trials, but the project was terminated in 1960. The B-24 had a very unusual configuration with two large propellers turning in prominent shrouds and the aircraft was powered by two 90hp Continental C90 engines. Instead Binder Aviatik acquired a licence for the much more conventional Piel CP-30 Émeraude and then built an own variant as the CP-301S Smaragd (qv).
Production: 1 (unflown)