Salmson B.9
# 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.

## 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
