The Salmson 4 AB.2, or SAL-4 AB.2 (AB.2 - Reconnaissance Bomber two-seat) was a two-seat bomber designed and built in France during the closing stages of World War I.
A variant of the Salmson 2, the Salmson 4 was essentially an enlarged version with a greater wingspan, three bay wings of greater area, enlarged vertical tail surfaces and detail changes to the engine installation. Twelve aircraft were built for l'Aéronautique Militaire before the end of World War I,[1][2][3] all of which were assigned to operational escadrilles in anticipation of widespread deployment following orders for mass production, which were cancelled with the end of the war.[1] They were withdrawn in 1920.[1]
Davilla, Dr. James J.; Soltan, Arthur (1997). French Aircraft of the First World War. Mountain View, CA: Flying Machines Press. pp. 447–448. ISBN978-1891268090.
Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). London: David & Charles (Publishers) Limited. ISBN0-7153-4647-4.
Parmentier, Bruno. "Salmson SAL-4". aviafrance.com (in French). Retrieved 12 June 2014.
