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From Wikipedia, the free encyclopedia

Gnome Delta - Moteurs Gnome October 1913.png
Gnome 9 Delta as shown in a 1913 Gnome catalog
Type Rotary aero engine
Manufacturer Société des Moteurs Gnome
First run c.1909
Major applications Avro 500
Vickers F.B.9 Gunbus
Unit cost 22,000 Francs

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 100 hp (75 kW) from its capacity of 16 litres (980 cu in).[1]


The baseline 9-cylinder 100 hp (75 kW) rotary engine.
An 18-cylinder 200 hp (150 kW) two-row rotary engine - Two Deltas on a common crankshaft.


List from Lumsden

Engines on display

Specifications (9 Delta)

Gnome 18 Delta-Delta from the 1913 Gnome catalog
Gnome 18 Delta-Delta from the 1913 Gnome catalog

Data from Lumsden.[1][3][4]

General characteristics


  • Valvetrain: Automatic centre-piston inlet valve, one overhead exhaust valve per cylinder.
  • Fuel system: one static Bloctube carburettor feeding the crankcase
  • Fuel type: 40 / 50 Octane gasoline
  • Oil system: Total loss pressure fed
  • Cooling system: Air-cooled


See also

Comparable engines

Related lists


  1. ^ a b Lumsden, Alec S.C. (1994). British piston aero-engines and their aircraft (1. publ. in the UK. ed.). Shrewsbury: Airlife Publ. p. 152. ISBN 1-85310-294-6.
  2. ^ Hauet, André (2001). Les Avions Caudrons. 1. Outreau: Lela Presse. p. 55. ISBN 2 914017-08-1.
  3. ^ Moteurs Gnome (PDF) (in French). Paris: Société des Moteurs Gnome. October 1913. pp. 15–18. Retrieved 26 June 2018.
  4. ^ Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio: THE OTTERBEIN PRESS. p. 212.
This page was last edited on 21 February 2020, at 17:27
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