aviation during World War One
WW1 aero engines

introduction
Clerget Rotary
Gnome Gamma
Gnome Lambda
Gnome Monosoupape B
Gnome 9-N Rotary
Goebel Goe III
LeRhone C-9
Le Rhone 9J
LUCT 80 CV
Oberursel UR-2 Rotary