The twin-engined F.50 flew for the first time in early 1918, powered by two 180 kW (240 hp) Lorraine 8Bb engines, as an unequal-span biplane with a slab-sided fuselage and a single fin and rudder.

The two engines, 205 kW (275 hp) Lorraine 8Bd V-8s on production aircraft, were mounted between the wings using vee bracing struts.

One example was used by Compagnie des Grands Express Aeriens from July 1920 from Paris to London and Amsterdam.

With the military designation Bn.2 (2-seat night bomber) the aircraft were delivered to squadrons within 1e Groupe de Bombardement.

[2] Data from The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing, Page 1736/7General characteristics Performance Armament