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B.9
Nine-cylinder Salmson on display at the London Science Museum
Type	Radial engine
Manufacturer	British Salmson
First run	1913
Number built	106

The Salmson B.9 was a French designed, nine-cylinder, water-cooled radial aero engine that was produced under license in Britain. The engine was produced between August 1914 and December 1918. The French version was designated 9B with a slightly increased capacity variant known as the R.9 or 9R. A further variant known as the M.9 or 9M unusually drove the propeller through a 90-degree gear train.

Variants

Salmson B.9 (Salmson 9B)

140 horsepower (104 kW)

Salmson M.9 (Salmson 9M)

120 horsepower (89 kW), 90-degree propeller drive

Salmson R.9 (Salmson 9R)

160 horsepower (119 kW, increased bore to 140 mm.

Applications

Salmson B.9

• Farman F.27
• Short Admiralty Type 135
• Short Type C
• Short 830
• Voisin LA.S

Salmson M.9

• Blackburn Type L
• Breguet U2
• Voisin LA

Salmson R.9

• Farman F.27

Engines on display

• A watercooled, nine-cylinder Salmson engine is on public display at the London Science Museum.

Specifications (B.9)

Data from Lumsden.

General characteristics

• Type: Nine-cylinder, single-row, water-cooled radial engine
• Bore: 122 mm (4.3 in)
• Stroke: 140 mm (5.5 in)

Components

• Valvetrain: Two overhead valves per cylinder
• Cooling system: Water-cooled
• Reduction gear: Direct drive, left hand tractor, right hand pusher

Performance

• Power output: 104 kW (140 hp) at 1,250 rpm
• Compression ratio: 5.16:1

See also

• Salmson

Comparable engines

• ABC Dragonfly

Related lists

• List of aircraft engines

References

Notes

1. ^ Lumsden 2003, p. 225.
2. Lumsden 2003, p. 226.

Bibliography

• Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

• 1910s aircraft piston engines
• Salmson aircraft engines
• Water-cooled radial engines