Gnome Delta
# 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 100 hp (75 kW) from its capacity of 16 litres (980 cu in).

## 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

* Avro Type 500
* Caudron Type L
* 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, Paris

## Specifications (9 Delta)

Data from Lumsden.

### 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

* Power output: 75 kW (100 hp) at 1,200 rpm
* Specific fuel consumption: 362 g/(kW·h) (0.6 lb/(hp·h))
