• 
• 
• 

• 

In 1929, Raab-Katzenstein-Flugzeugwerke GmbH began converting another reconnaissance aircraft from the First World War into a civilian aircraft. This time we chose a slightly larger car - LVG C.VI. Instead of an open observer's cabin, a closed cabin for three passengers was installed. In this form, the aircraft received the designation Raab-Katzenstein RK.8 Marabu.
Initially, a used Benz Bz.IV was bought for 2500 Reichsmarks for RK.8 (as in the base aircraft), but then the engines were replaced with a more advanced Junkers L 2 six-cylinder water-cooled engine of the same power.
In 1929, two RK.8s were built specifically for the Trumpf chocolate company. They were used mainly for nighttime advertising. Two more machines for similar purposes were purchased by industrialists from Hungary.
Another aircraft was made with an open second cockpit and received the designation RK.8a. In the early 1930s, the RK.8a was used to fight forest fires near Kassel.