Salmson B.9

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.

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

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

Bibliography

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