1903 Wright engine
Credit - Wright State University
Curtiss four-cylinder engine
Credit - U.S. Air Force Museum
Curtiss OX-5 engine
Curtiss V2-3 engine
Anzani 10 engine
Hispano-Suiza 8BE engine
Gnome 9-N engine
Clerget rotary engine
Credit - www.aviation-history.com
LeRhone C-9 engine
Rolls-Royce Hawk engine
Liberty V8-cylinder engine
Liberty 12-A engine