Gnome Delta

This article refers to the two-valve Gnome rotary engine (automatic inlet valve in the piston crown and pushrod operated exhaust valve). For the 100 hp Monosoupape engine go to Gnome Monosoupape 9 Type B-2, (Monosoupape engines had a single pushrod operated exhaust valve and inlet ports exposed by the piston near bottom dead centre).

Delta
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 horsepower (75 kW) from its capacity of 16 litres (990 cubic inches).[1]

Variants

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

Applications

List from Lumsden

Engines on display

Specifications (9 Delta)

Gnome 18 Delta-Delta from the 1913 Gnome catalog

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

General characteristics

  • Type: 9-cylinder, single-row, rotary engine
  • Bore: 124 mm (4.88 in)
  • Stroke: 150 mm (5.91 in)
  • Displacement: 16.28 l (993.47 cu in)
  • Length: 1,150 mm (45.28 in)
  • Diameter: 1,020 mm (40.16 in)
  • Dry weight: 135 kg (297.6 lb)

Components

  • 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

Performance

See also

Comparable engines

Related lists

References

  1. 1 2 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.
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