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Salmson 9 / 9 AC / 9 AD
Menasco-Salmson B-2
British Salmson AC.9
British Salmson AD.9

 

Salmson-AD9

Salmson 9Ad

 

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. Built from 1920, production ended in 1951 with the liquidation of the manufacturing company.

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.

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.

British Salmson aero-engines refers to a series of small French designed, air-cooled radial aero engine that were produced by British Salmson, under license from Société des Moteurs Salmson, in Great Britain during the late 1920s and 1930s.

Due to the fact, that the relatively low power was divided among several cylinders, the running of the engines was particularly smooth, and the torque was very even. 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.

Unit price in 1929 was £175.

 

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). 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).

AD.9NG
203 horsepower (151 kW), increased bore and stroke. (100 x 140 mm, 10 L capacity).

9 AD
The standard production model with LH rotation direct drive.

9 ADb

British Salmson AD.9
Production of the Salmson 9AD in Great Britain by the British Salmson Company at New Malden, Surrey.

British Salmson A.D.9R srsIII
The A.D.9 with a 0.5:1 reduction gear

 

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
Arpin A-1

AD.9NG
Cierva C.40

 

Specifications:

9 AB
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 cu.in)
Length: 1,000 mm (39.37 in)
Diameter: 1,180 mm (46.46 in)
Dry weight: 265 kg (584 lb)
Valvetrain: Two overhead valves per cylinder
Supercharger: Single-speed centrifugal type supercharger
Fuel system: Zenith 42D carburetor
Cooling system: Air-cooled
Power output: 191 kW (256 hp) at 1,780 rpm for takeoff
Specific power: 10.18 kW/l (0.22 hp/cu.in)
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)

 

9 Aba

 

9 ABc
Power: 172 kW (230 hp)

 

9 AC
Type: 9-cyl radial
Bore: 100 mm (3.937 in)
Stroke: 130 mm (5.118 in)
Capacity: 9.189 l (560.75 cu in)
Power: 96.94 kW (130 hp) at 1,800rpm

 

9 AD
Type: 9-cyl radial
Bore: 70 mm (2.756 in)
Stroke: 86 mm (3.386 in)
Capacity: 2.979 l (181.79 cu in)
Power: 33.56 kW (45 hp) at 2,000rpm
Dry weight: 68 kg (150 lb)

 

9 ADb
Type: 9-cyl radial
Bore: 70 mm (2.756 in)
Stroke: 86 mm (3.386 in)
Capacity: 2.979 l (181.79 cu in)
Power: 41 kW (55 hp) at 2,200rpm

 

9 ADr
Type: 9-cyl radial
Bore: 70 mm (2.756 in)
Stroke: 86 mm (3.386 in)
Capacity: 2.979 l (181.79 cu in)
Power: 48.5 kW (65 hp) at 2,700rpm

 

9 Az

 

9 A2c

 

9 M

 

9 NA
Type: 9-cyl radial
Bore: 140 mm (5.512 in)
Stroke: 160 mm (6.299 in)
Capacity: 22.140 l (1,351.07 cu in)
Power: 246 kW (330 hp) at 1,800rpm

 

9 NAs
Type: 9-cyl radial
Bore: 140 mm (5.512 in)
Stroke: 160 mm (6.299 in)
Capacity: 22.14 l (1,351.07 cu in)
Power: 41 kW (55 hp) at 1,800rpm

 

9 NC
Type: 9-cyl radial
Bore: 100 mm (3.937 in)
Stroke: 140 mm (5.512 in)
Capacity: 9.9 l (604.14 cu in)
Power: 111.85 kW (150 hp) at 1,800rpm

 

9 NCt
Type: 9-cyl radial
Bore: 100 mm (3.937 in)
Stroke: 140 mm (5.512 in)
Capacity: 9.9 l (604.14 cu in)
Power: 126.77 kW (170 hp) at 1,800rpm

 

9 Nd
131 kW (175 hp)

 

9 P

 

9 Y

 

British Salmson AD.9
Type: Nine-cylinder, single-row, air-cooled radial engine
Bore: 70 mm (2.8 in)
Stroke: 86 mm (3.4 in)
Displacement: 2,979 cm3 (181.8 cu in)
Diameter: 686 mm (27.0 in)
Dry weight: 70 kg (150 lb)
Valvetrain: Two overhead valves per cylinder, pushrod operated
Fuel system: Claudel carburettor
Oil system: Pressure lubrication
Cooling system: Air-cooled
Reduction gear: Direct drive
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)

 

 


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