

The wing tips were akin to that of the Bf 109E. The fuselage had a wider cross-section, and a new canopy was fitted. This aircraft became a prototype for the Bf 109X. Its end is not known.Īs the BMW 801 radial engine became available, a Bf 109F, Werknummer 5608, callsign D-ITXP was converted with a BMW 801 A-0. In September 1940 it was part of the DVL (Deutsche Versuchtanstalt für Luftfahrt) at Brauschweig-Völkenrode with the Stammkennzeichen code KB+II. Even the maiden flight date is not known it is established that Hermann Wurster flew it at Augsburg on 17 August 1939. The Messerschmitt company received a contract from RLM/LC on 13 June 1938 to fit the P&W Twin Wasp on the Bf 109 V21 (21st prototype) Werknummer 1770 (D-IFKQ).

The engine chosen was the P&W "Twin Wasp" SC-G of 1200 hp. After the success of the demonstration at the meeting of Zürich in 1937, Udet would have been favorable to develop an export version of the Bf 109 but with a different engine than the DB 601.
