Following the success of their two-seat tourer/trainer the
Fieseler F5, Fieseler was encouraged by the German
Reichsluftfahrtministerium (RLM) to develop a four-seat version specially to take part in the European touring plane championship
Challenge 1934. The result of this request was the Fi 97, designed by Kurt Arnolt. It was a mixed-construction low-wing
cantilever monoplane with a conventional
tail unit. The fuselage had a fabric-covered steel tubing frame. The wing structure was wood and was covered with fabric and
plywood. The wings were able to be folded aft for storage or ground transport. The
tailskid undercarriage was fixed. The pilot and three passengers had an enclosed cabin. Five examples of the Fi 97 were built. Three aircraft were fitted with the
Hirth HM 8U, 250 hp inverted V8 engine, and two used the
Argus As 17A, 225 hp inverted 6-cylinder inline engine. Both engines are air-cooled. The plane had
STOL capabilities and the most significant design aspect was the wing's high-lift devices to enable the aircraft to be flown at low speeds. The leading-edge had
Handley Page type automatic
slats over more than half of the span. The trailing edge had Fieseler-designed
Ausrollflügel, a Fowler-type trailing-edge
flap. The trailing-edge flap increased the wing area by nearly 20%. These high-lift features allowed the aircraft to be controlled down to 58 km/h (36 mph). These features were later utilized in construction of the famous
Fieseler Fi 156 Storch. ==Operational history==