This extremely rare manual was issued in 1916 to the then Royal Flying Corps (later the Royal Air Force) and covers the technical aspects of engines and aircraft in service in 1916. Engines include the Gnome, Beardmore, Curtiss 90 h.p., and the Rolls Royce Aero 250 h.p., and others. The aircraft include the Maurice Farman Short- and Longhorn, the type C Bristol Scout, the Vicker's Fighter and the FE 2B as well as others. Technical data is given and the aircraft are illustrated with line and rigging drawings. Also included are instructions for changing the air observation camera. Altogether a fascinating manual which is extremely rare.