Raab-Katzenstein RK-26
Aircraft model
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Raab-Katzenstein RK-26 Tigerschwalbe, also known as the Fieseler F 1 Tigerschwalbe, was a German twin-seat biplane trainer aircraft designed by Gerhard Fieseler by the end of the 1920s. Wikipedia
Top speed: 118 mph
First flight: 1930
Manufacturers: Raab-Katzenstein and AB Svenska Järnvägsverkstädernas Aeroplanavdelning