British Salmson AD.9
British Salmson aero-engines refers to a series of small French designed, air-cooled radial aero engine that were produced by British Salmson Aero Engines Ltd, under license from Société des Moteurs Salmson, in Great Britain during the late 1920s and 1930s.
| AD.9 | |
|---|---|
 | |
| Type | Radial engine |
| National origin | Great Britain |
| Manufacturer | British Salmson |
Because the relatively low power was divided among several cylinders, the running of the engines was particularly smooth, and the torque was very even.[1] Adding to the smooth running of these engines was the use of the Canton-Unne system of planetary gears in a cage connecting pistons to crank-pin.
Variants
- AD.3
- Three cylinder license production of the Salmson 3 Ad
- AC.7
- 105 horsepower (78 kW) seven cylinder radial, capacity 7.15 litres (436 cu in)
- AC.9
- 135 horsepower (101 kW) nine cylinder radial, capacity 9.2 litres (560 cu in)
- AD.9
- 50 horsepower (37 kW) at 2000 rpm (normal power) or 55 horsepower (41 kW) at 2200 rpm (maximum power).[1] Bore of 70 mm.
- AD.9R
- 70 horsepower (52 kW), geared version of AD.9 with increased bore of 73 mm and increased compression ratio (6:1) (3239cc / 197.7cuin).
- AD.9NG
- 203 horsepower (151 kW), increased bore and stroke. (100 x 140 mm, 9896cc (603.9cuin) capacity).
Applications
- AD.9
- Angus Aquila
- BA Swallow
- Comper Swift
- Boulton Paul P.41 Phoenix
- General Aircraft Monospar
- Hafner Revoplane
- Hinkler Ibis
- Parmentier Wee Mite
- AD.9R
- AD.9NG
Specifications (AD.9)
Data from Salmson in Flight magazine, April 4, 1930]
General characteristics
- Type: Nine-cylinder, single-row, air-cooled radial engine
- Bore: 70 mm (2.76 in)
- Stroke: 86 mm (3.39 in)
- Displacement: 2,979 cm3 (181.8 cu in)
- Diameter: 686 mm (27.0 in)
- Dry weight: 70 kg (154 lb)
Components
- Valvetrain: Two overhead valves per cylinder, pushrod operated
- Fuel system: Claudel carburettor
- Oil system: Pressure lubrication
- Cooling system: Air-cooled
- Reduction gear: Direct drive
Performance
- Power output: 37 kW (50 hp) at 2,000 rpm
- Compression ratio: 5.6:1
- Power-to-weight ratio: 0.42 kW/kg (0.26 hp/lb)
References
Notes
- Salmson in Flight magazine, April 4, 1930.
Bibliography
- Flight magazine, 25 July 1929.
- Flight magazine, 22 November 1929.
- Flight magazine, April 4, 1930.
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