Flug- und Fahrzeugwerke Altenrhein AG (FFA) was a Swiss aircraft and railroad car manufacturing company based in Altenrhein. Originally part of Dornier Flugzeugwerke, it split off in 1948. During the post-World War II period, FFA manufactured fighter aircraft for the Swiss Air Force, based on Morane-Saulnier designs as the D-3803, which were later replaced in service by surplus P-51 Mustangs. In the 1950s, FFA developed a jet fighter, the P-16, which was cancelled after two crashes. The company also built the Diamant series of sailplanes in the 1960s and licence-built many aircraft for Swiss use, including the de Havilland Vampire, de Havilland Venom, Dassault Mirage III, and F-5 Tiger II. In 1987, the company name was bought back by Dornier, and the railway part went to Schindler first, ending up in 1997 as part of Stadler Rail. FFA aircraft included the AS 202 Bravo, P-16, and Diamant.