The main character of the company was its designer
Gerhard Fieseler. Following
World War I, he returned to printing, but yearned to return to flying. In 1926, he closed his print shop in
Eschweiler and became a flight instructor with Raab-Katzenstein and continued to hone his flying skills, becoming an accomplished stunt pilot. In 1927, he performed a particularly daring routine in
Zürich and started to command increasingly high fees for appearances. In 1928 while working at Raab-Katzenstein, he designed his own stunt plane, the
Fieseler F1 (also known as the
Raab-Katzenstein RK-26 Tigerschwalbe), which was offered and sold to a Swedish company called AB Svenska Järnvägverkstaderna (ASJA), which built 25 of the type for Swedish Air Force in the beginning of the 1930s. In 1930, Raab-Katzenstein was bankrupt, and Fieseler decided to strike out on his own. Using money he had been saving from his aerobatics, he bought the
Segelflugzeugbau Kassel sailplane factory and renamed it
Fieseler Flugzeugbau. ==Aircraft==