The Fieseler Fi 99 Jungtiger (en|Young Tiger) was a German sports aircraft prototype, produced by Fieseler company. The aircraft was a low-wing two-seat aircraft with an enclosed cabin. It was powered by a Hirth HM 506A engine, producing 1600NaN0.
Further reading
Book: Nowarra, Heinz J.. Die deutsche Luftrüstung 1933-1945, Volume 4. German. 978-3-7637-5464-9. 1988.
Journal of the Aerospace Sciences. 6. Institute of the Aerospace Sciences. 1939. 122.