Salmson 9

Salmson 9
Salmson AD 9
Type	Radial engine
Manufacturer	Salmson
First run	1917

The term Salmson 9 refers to any of a number of nine-cylinder, radial aircraft engines that were developed from 1910 onwards and built by Société des Moteurs Salmson in France. All Salmson engines produced after 1920 were air-cooled.^[1]

Design and development

The designation Salmson 9 merely refers to the number of cylinders and the different series of engines were identified by the letter suffixes. Like most radials, later versions were air-cooled, but early Salmson engines were famous for being the only series-produced water-cooled radials. In common with other engines produced by this manufacturer, Salmson 9s 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.

Variants

Variants of the Salmson 9 included:

• 9 A
• 9 Ab
  • 9 Aba
• 9 AbC 172 kW (230 hp)
• 9 Ac
• 9 Ad
• 9 Adr (60HP reducted)
• 9 Adb 134 kW (180 hp)
• 9 Az
• 9 A2c
• 9 Cm
• 9 M
• 9 Nd 131 kW (175 hp)
• 9 Nc
• 9 P
• 9 Y
• Salmson 9 Z 172–190 kW (230–250 hp) water-cooled - Not a variant but a completely different engine!
• Salmson-(Canton-Unne) Z9 - Not a variant but a completely different engine!

Applications

Arpin A-1 Anatra DS Arado L I BFW M.23 Bloch MB.81 Boulton Paul Phoenix Farman F.90 Grigorovich M-9 Henderson-Glenny Gadfly III Jodel D11 Latécoère 4[2] Lebed XII

Morane-Saulnier MS.230 RWD-2 Salmson-Latécoère[2] Salmson 2[2] Siebel Si 202 Salmson-Moineau SNCASE Alouette I Starck A.S. 70 Jac Taylor E-2 Voisin III Voisin V

Specifications (9 AB)

Data from Tsygulev^[3]

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)

Specifications (9 NC)

Data from Tsygulev^[3]

General characteristics

• Type: Nine-cylinder single-row naturally aspirated air-cooled radial engine
• Bore: 100 mm (3.94 in)
• Stroke: 140 mm (5.51 in)
• Displacement: 9.9 l (604 in³)
• Length: 935 mm (36.81 in)
• Diameter: 960 mm (37.8 in)
• Dry weight: 154 kg (340 lb)

Components

• Valvetrain: Two overhead valves per cylinder
• Fuel system: Zenith carburetor
• Cooling system: Air-cooled

Performance

• Power output: 115 kW (154 hp) at 1,900 rpm for takeoff
• Specific power: 11.62 kW/l (0.25 hp/in³)
• Compression ratio: 5:1
• Specific fuel consumption: 308 g/(kW•h) (0.51 lb/(hp•h))
• Oil consumption: 19 g/(kW•h) (0.49 oz/(hp•h))
• Power-to-weight ratio: 0.75 kW/kg (0.45 hp/lb)

See also

• List of aircraft engines

Notes

1. ^ Gunston 1986, p. 158.
2. ^ ^{a b c} * Cuny, Jean. “Latécoère - Les Avions et Hydravions”.Paris. Docavia/Editions Lariviere. 1992. ISBN 2-90 70 51-01-6
3. ^ ^{a b} Tsygulev (1939). Aviacionnye motory voennykh vozdushnykh sil inostrannykh gosudarstv (Russian: Авиационные моторы военных воздушных сил иностранных государств). Moscow: Gosudarstvennoe voennoe izdatelstvo Narkomata Oborony Soyuza SSR. http://base13.glasnet.ru/text/aviamotory/t.htm. 

References

• Gunston, Bill (1986). World Encyclopaedia of Aero Engines. Wellingborough: Patrick Stephens. p. 152. 
• 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 2-90 70 51-01-6