Gnome Delta
The Gnome 9 Delta was a French designed, nine-cylinder, air-cooled rotary aero engine that was produced under license in Britain. Powering several World War I era aircraft types it produced from its capacity of.Variants
;Delta:The baseline 9-cylinder rotary engine.
;Delta-Delta:An 18-cylinder two-row rotary engine - Two Deltas on a common crankshaft.Applications
List from Lumsden