The Swiss DoFlug (Dornier Werke) was asked to develop a fighter in 1942. The D-3802 was of all-metal, stressed-skin construction, but broadly based on the {D-3801}, a license-built Morane-Saulnier MS 412. The engine was a copy of the French Hispano-Suiza 12Y. The prototype flew in 1944 and first production aircraft were delivered in 1946. Only 12 were built, and these served until 1946.