An open tail boom truss supported a horizontal tailplane and a curved fin.

Forty French Air Force escadrilles (squadrons) were equipped with F.40s.

5 Wing of the Royal Naval Air Service, Belgian forces in France, and also by the Russians.

The Portuguese Forces in Mozambique included a small squadron of F.40, which participated in the East African Campaign.

Italian aircraft maker Savoia-Marchetti built F.40s for use by the police force until 1922.