Built by Werner Kuffner (WK) as a one off in 1975, the WK-1 is a two seater motor glider with a BMW R90/S, 600cc 58 HP motor driving a foldable 3 blade prop that spins around the fuselage behind the cabin. The engine runs a toothed belt that spins a metal ring on which folding propeller blades are mounted.
It is in the Glider Museum Wasserkuppe.
Wing span: 18.80m
Empty weight: 430kg
Best glide ratio: 33.2
Seats: 2
All Aero 