Clerget 9B

9B
Preserved Clerget 9B engine on display at the Fleet Air Arm Museum, RNAS Yeovilton.
Type	Rotary engine
National origin	France
Manufacturer	Clerget-Blin
First run	1913
Major applications	Sopwith Camel
Number built	3,650 (British production)
Unit cost	£907.50 (1915)[1]
Developed into	Bentley BR1

The Clerget 9B was a nine-cylinder rotary aircraft engine of the World War I era designed by Pierre Clerget. Manufactured in both Great Britain (Gwynne Limited) and France, it was used on such aircraft as the Sopwith Camel. The Clerget 9Bf was an increased stroke version.^[2]

Contents 1 Variants 2 Applications 2.1 Clerget 9B 2.2 Clerget 9Bf 3 Engines on display 4 Specifications (Clerget 9B) 5 See also 6 References 6.1 Notes 6.2 Bibliography

Variants

Clerget 9B

(1913) 130 hp (97 kW). 1,300 produced by Ruston Proctor & Co Ltd of Lincoln

Clerget 9Bf

(1915) 140 hp (104 kW). Extended stroke (172 mm (6.75 in)) version, increasing capacity to 17.5 L (1,066.5 cu in). 1,750 produced by Gwynnes Ltd. and 600 produced by Ruston Proctor.

Applications

Clerget 9B

• Armstrong Whitworth F.K.10
• Avro 504
• Avro 531
• Bristol M.1
• Cierva C.6
• Cierva C.8
• Fairey Hamble Baby
• Nieuport 12
• Nieuport 17
• Nieuport Triplane
• Sopwith Baby
• Sopwith Camel
• Sopwith Scooter
• Sopwith Triplane
• Sopwith 1½ Strutter

Clerget 9Bf

• Sopwith Camel

Engines on display

• A preserved Clerget 9B engine is on public display at the Fleet Air Arm Museum, RNAS Yeovilton.
• A Clerget 9Bf engine is on display at the Powerhouse Museum, Sydney.^[3]

Specifications (Clerget 9B)

Data from Lumsden.^[2]

General characteristics

• Type: Nine-cylinder air-cooled rotary engine
• Bore: 120 mm (4.72 in)
• Stroke: 160 mm (6.30 in)
• Displacement: 16.29 L (993.8 cu in)
• Dry weight: 175 kg (385 lb)

Components

• Fuel system: Bloctube carburettor
• Cooling system: Air-cooled

Performance

• Power output: 130 hp (96 kW) at 1,250 rpm
• Compression ratio: 4.56:1

See also

• Clerget aircraft engines
  

Related development

• Bentley BR1
• Bentley BR2
  

Comparable engines

• Gnome Monosoupape
• Le Rhône 9J
  

Related lists

• List of aircraft engines
  

References

Notes

Bibliography

Clerget aircraft engines Rotary engines 7Z · 9B · 9Bf · 9Z · 11Eb Radial diesel engines 9A · 14F 'H' engines Type Transatlantique 'X' engines 16X See also: Clerget aircraft engines

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