# Clerget 11Eb

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World War I–era rotary aircraft engine

11Eb Type Rotary engine National origin France Manufacturer Clerget-Blin First run 1918 Major applications Sopwith Bulldog

The **Clerget 11Eb** was an 11-cylinder [rotary](/source/Rotary_engine) [aircraft engine](/source/Aircraft_engine) of the [World War I](/source/World_War_I) era designed by [Pierre Clerget](https://en.wikipedia.org/w/index.php?title=Pierre_Clerget&action=edit&redlink=1). Powering [Sopwith](/source/Sopwith_Aviation_Company) types it was nominally rated at 200 [horsepower](/source/Horsepower) (150 kW).[1]

## Applications

- [Sopwith Bulldog](/source/Sopwith_Bulldog)

- [Sopwith Hippo](/source/Sopwith_Hippo)

- [Sopwith Salamander](/source/Sopwith_Salamander)

## Specifications (Clerget 11Eb)

*Data from* *Lumsden*.[1][2]

### General characteristics

- **Type:** 11-cylinder air-cooled [rotary engine](/source/Rotary_engine)

- **[Bore](/source/Bore_(engine)):** 120 mm (4.72 in)

- **[Stroke](/source/Stroke_(engine)):** 190 mm (7.48 in)

- **[Displacement](/source/Engine_displacement):** 21.49 L (1,311.40 cu in)

- **[Dry weight](/source/Dry_weight):** 232 kg (511 lb)

### Components

- **[Valvetrain](/source/Valvetrain):** 1 each overhead inlet and exhaust valves operated by pushrods and rockers

- **Fuel system:** [Bloctube](https://en.wikipedia.org/w/index.php?title=Bloctube&action=edit&redlink=1) carburettor

- **Fuel type:** [Gasoline](/source/Gasoline) with [Castor oil](/source/Castor_oil) lubricant

- **Oil system:** Castor oil mixed with fuel

- **Cooling system:** Air-cooled

### Performance

- **Power output:** 160 kW (215 hp) at 1,300 rpm (maximum power)

- **[Specific power](/source/Power_density):** 0.1639 hp/cu in (7.46 kW/L)

- **[Compression ratio](/source/Compression_ratio):** 5.1:1

- **[Specific fuel consumption](/source/Brake_specific_fuel_consumption):** 0.518 L/kW/hour (0.68pt/hp/hour)

- **Oil consumption:** 0.0838 L/kW/hour (0.11 pt/hp/hour)

- **[Power-to-weight ratio](/source/Power-to-weight_ratio):** 0.694 kW/kg (0.421 hp/lb)

## See also

- [Clerget aircraft engines](/source/Clerget_aircraft_engines)

**Comparable engines**

- [Gnome Monosoupape](/source/Gnome_Monosoupape)

- [Le Rhône](/source/Le_Rh%C3%B4ne)

**Related lists**

- [List of aircraft engines](/source/List_of_aircraft_engines)

## References

### Notes

1. ^ [***a***](#cite_ref-Lumsden_1-0) [***b***](#cite_ref-Lumsden_1-1) Lumsden 2003, p. 134.

1. **[^](#cite_ref-JAWA1919_2-0)** Grey, C.G. (1969). *Jane's All the World's Aircraft 1919* (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. [ISBN](/source/ISBN_(identifier)) [978-0-7153-4647-1](https://en.wikipedia.org/wiki/Special:BookSources/978-0-7153-4647-1).

### Bibliography

- Gunston, Bill. *World Encyclopaedia of Aero Engines*. Cambridge, England. Patrick Stephens Limited, 1989. [ISBN](/source/ISBN_(identifier)) [1-85260-163-9](https://en.wikipedia.org/wiki/Special:BookSources/1-85260-163-9)

- Lumsden, Alec. *British Piston Engines and their Aircraft*. Marlborough, Wiltshire: Airlife Publishing, 2003. [ISBN](/source/ISBN_(identifier)) [1-85310-294-6](https://en.wikipedia.org/wiki/Special:BookSources/1-85310-294-6).

- Grey, C.G. (1969). *Jane's All the World's Aircraft 1919* (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. [ISBN](/source/ISBN_(identifier)) [978-0-7153-4647-1](https://en.wikipedia.org/wiki/Special:BookSources/978-0-7153-4647-1).

v t e Clerget aircraft engines Inline-four engines 50 hp (4V) 100 hp (4W) V8 engine 200 hp Rotary engines 7Y 7Z 9A 9B 9Bf 9Z 11Eb 9J 'X' engines 16X Flat twin engines 2K 2L Radial diesel engines 9A 9B 9C 14D 14E 14F V16 diesel engine 16H

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Adapted from the Wikipedia article [Clerget 11Eb](https://en.wikipedia.org/wiki/Clerget_11Eb) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Clerget_11Eb?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.