Single-engine fighter aircraft, later presented in Germany as the A 48 courier aircraft and offered abroad as the K 47 military aircraft. Apart from its armament, the K 47 differed primarily from the A 48 by its twin tail, which gave the gunner a clear field of fire to the rear. In a type program meeting in January 1927, JFA board member Hans Sachsenberg urgently requested the design of a high-performance two-seater, for example, for sale to Turkey. On February 19, 1927, the designs EF24/1 (single-seater) and EF 24/2 (two-seater) were subsequently presented, both equipped with a Gnome-Rhone “Jupiter VI” radial engine (480 hp continuous power). After lengthy discussion, the decision was made in favor of the two-seater variant.
In July 1927, the design office also calculated the EF 24 with the inline engines Junkers L 55 without supercharger (600/650 hp), Lorraine-Dietrich 18 Ha (600 hp), Packard 1A-2500 with gearbox (600 hp), and Packard 2A-2500 without gearbox (800 hp).
In a further type review on December 1, 1927, Dipl.-Ing. Hermann Pohlmann presented the final design drawing of the high-performance two-seater.
The final type numbers J 47 and J 48 first appear in a note from the design office dated January 9, 1928. The
maiden flight of the aircraft took place on September 29, 1928 in Dessau.
