First product was Schwalbe two-seat training biplane with Siemens engine.
Twenty five were operated by the Swedish Flygvapnet as trainers.
Raab-Katzenstein RK-26 Tigerschwalbe
First product was Schwalbe two-seat training biplane with Siemens engine.
Twenty five were operated by the Swedish Flygvapnet as trainers.
All Aero 