Salmson air-cooled aero-engines
| Salmson 9 | |
|---|---|
| 300px | |
| Salmson 9Ad | |
| Type | Radial engine |
| Manufacturer | Société des Moteurs Salmson |
| First run | 1917 |
Between 1920 and 1951 the Société des Moteurs Salmson in France developed and built a series of widely used air-cooled aircraft engines.[1]
Contents
Design and development
After their successful water-cooled radial engines, developed from 1908 to 1918, Salmson changed their focus to air-cooling to reduce weight and increase specific power (power per unit weight). The majority of the engines produced by Salmson were of radial type with a few other arrangements such as the Salmson T6.E. In common with other engines produced by this manufacturer, the air-cooled radial engines featured the unorthodox Canton-Unné internal arrangement that dispensed with a master rod in favour of a cage of epicyclic gears driving the crankpin. Production ended in 1951 with the liquidation of the manufacturing company.
British Salmson
The 3,7 and 9 cylinder Salmsons were license built in Great Britain, during the 1920s and 1930s, by the British Salmson engine company as the British Salmson AD.3, British Salmson AC.7, British Salmson AC.9, and British Salmson AD.9.
Salmson post-WWI engines
In common with several other French aero-engine manufacturers Salmson named their engines with the number of cylinders then a series letter in capitals followed by variant letters in lower-case. Engines not included in the 1932 table are listed here:
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Salmson air-cooled engines available in 1932 are tabled here[3]
| Name | Cylinders | Year | Bore | Stroke | Capacity | Power | Weight |
|---|---|---|---|---|---|---|---|
| 7AC | 7-cyl radial | 100 mm (3.94 in) | 130 mm (5.12 in) | 7.150 L (436.3 cu in) | 78 kW (105 hp) at 1,800 rpm | 130 kg (287 lb) | |
| 9AB | 9-cyl radial | 125 mm (4.92 in) | 170 mm (6.69 in) | 18.765 L (1,145.1 cu in) | 186 kW (250 hp) at 1,700 rpm | 265 kg (584 lb) | |
| 9AC | 9-cyl radial | 100 mm (3.94 in) | 130 mm (5.12 in) | 9.189 L (560.7 cu in) | 97 kW (130 hp) at 1,800 rpm | 170 kg (375 lb) | |
| 9AD | 9-cyl radial | 70 mm (2.76 in) | 86 mm (3.39 in) | 2.979 L (181.8 cu in) | 34 kW (45 hp) at 2,000 rpm | 68 kg (150 lb) | |
| 9ADb | 9-cyl radial | 70 mm (2.76 in) | 86 mm (3.39 in) | 2.979 L (181.8 cu in) | 41 kW (55 hp) at 2,200 rpm | 74 kg (163 lb) | |
| 9ADr | 9-cyl radial | 70 mm (2.76 in) | 86 mm (3.39 in) | 2.979 L (181.8 cu in) | 48 kW (65 hp) at 2,700 rpm | 79 kg (174 lb) | |
| 9NA | 9-cyl radial | 140 mm (5.51 in) | 160 mm (6.30 in) | 22.140 L (1,351.1 cu in) | 246 kW (330 hp) at 1,800 rpm | 292 kg (644 lb) | |
| 9NAs | 9-cyl radial | 140 mm (5.51 in) | 160 mm (6.30 in) | 22.140 L (1,351.1 cu in) | 336 kW (450 hp) at 1,800rpm | 315 kg (694 lb) | |
| 9NC | 9-cyl radial | 100 mm (3.94 in) | 140 mm (5.51 in) | 9.900 L (604.1 cu in) | 112 kW (150 hp) at 1,800 rpm | 155 kg (342 lb) | |
| 9NCt | 9-cyl radial | 100 mm (3.94 in) | 140 mm (5.51 in) | 9.900 L (604.1 cu in) | 127 kW (170 hp) at 1,800 rpm | 165 kg (364 lb) | |
| 18AB | 18-cyl air-cooled in-line radial | 125 mm (4.92 in) | 180 mm (7.09 in) | 39.761 L (2,426.4 cu in) | 410 kW (550 hp) at 1,700 rpm | 450 kg (992 lb) | |
| 18ABs | 18-cyl air-cooled in-line radial | 125 mm (4.92 in) | 180 mm (7.09 in) | 39.761 L (2,426.4 cu in) | 485 kW (650 hp) at 1,700 rpm | 465 kg (1,025 lb) |
Applications
Nine cylinder engines
Seven cylinder engines
- Caudron C.190
- Caudron C.220
- Caudron C.270
- Farman F.230
- Farman F.280
- Hanriot H.41
- Morane-Saulnier MS.130
- Morane-Saulnier MS.147
- Potez 36
Five cylinder engines
Specifications (9 Ab)
Data from Tsygulev[4]
General characteristics
- Type: Nine-cylinder single-row supercharged air-cooled radial engine
- Bore: 125 mm (4.92 in)
- Stroke: 170 mm (6.69 in)
- Displacement: 18.765 l (1,145 in³)
- Length: 1,000 mm (39.37 in)
- Diameter: 1,180 mm (46.46 in)
- Dry weight: 265 kg (584 lb)
Components
- Valvetrain: Two overhead valves per cylinder
- Supercharger: Single-speed centrifugal type supercharger
- Fuel system: Zenith 42D carburetor
- Cooling system: Air-cooled
Performance
- Power output: 191 kW (256 hp) at 1,780 rpm for takeoff
- Specific power: 10.18 kW/l (0.22 hp/in³)
- Compression ratio: 5:1
- Specific fuel consumption: 328 g/(kW•h) (0.54 lb/(hp•h))
- Oil consumption: 19 g/(kW•h) (0.49 oz/(hp•h))
- Power-to-weight ratio: 0.72 kW/kg (0.44 hp/lb)
See also
Notes
- ↑ Gunston 1986, p. 158.
- ↑ http://www.fai.org/fai-record-file/?recordId=12218
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
References
- Lua error in package.lua at line 80: module 'strict' not found.
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
- Cuny, Jean. “Latécoère - Les Avions et Hydravions”.Paris. Docavia/Editions Lariviere. 1992. ISBN 2-907051-01-6
