Includes information on theory, construction, wiring, propeller, woods, the Curtiss, Hall-Scott, Sturtevant, Thomas-Morse, Gnome, Hispano-Suiza, and Liberty engines; instruments, Lewis machine gun, training and the inspection of aero machines. Doublesided photocopied and plastic comb bound. 200 pages. Fred H. Colvin. 1918. A must have for the early aero enthusiast building or maintaining a WW1 era aeroplane.