The Gnome 9 Delta was a French designed, nine-cylinder,

air-cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. Air-cooled designs are far simpler than their liquid-cooled ...

rotary

aero engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

that was produced under license in Britain. Powering several

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

era aircraft types it produced from its

capacity Capacity or capacities may refer to: Mathematics, science, and engineering * Capacity of a container, closely related to the volume of the container * Capacity of a set, in Euclidean space, the total charge a set can hold while maintaining a giv ...

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'' *

Avro Type 500 The Avro Type E, Type 500, and Type 502 made up a family of early British military aircraft, regarded by Alliott Verdon Roe as his firm's first truly successful design. It was a forerunner of the Avro 504, one of the outstanding aircraft of th ...

Caudron Type L The Caudron Type L was a two-seat French pusher configuration amphibious biplane, flown around 1913 and intended for naval use. Design With unequal span, two bay, unstaggered wings and an open frame fuselage, the Type L had much in common w ...

*Dreadnought No.1http://www.century-of-flight.freeola.com/Aviation%20history/up%20to%20WW%201/dreadnought_1.htm * Pemberton-Billing P.B.25 * Royal Aircraft Factory S.E.2 * Vickers No.7 Monoplane * Vickers F.B.9 Gunbus

Engines on display

*A preserved Gnome 9 Delta engine is on public display at the

Musée des Arts et Métiers The Musée des Arts et Métiers (; English: Museum of Arts and Crafts) is an industrial design museum in Paris that houses the collection of the Conservatoire national des arts et métiers, which was founded in 1794 as a repository for the preser ...

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

Specifications (9 Delta)

Gnome Delta-Delta - Moteurs Gnome October 1913

References

External links

{{Gnome-Rhône aeroengines Air-cooled aircraft piston engines 1900s aircraft piston engines

Delta Delta commonly refers to: * Delta (letter) (Δ or δ), the fourth letter of the Greek alphabet * D (NATO phonetic alphabet: "Delta"), the fourth letter in the Latin alphabet * River delta, at a river mouth * Delta Air Lines, a major US carrier ...