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The Bristol Cherub is a British two-cylinder, air-cooled, aircraft engine designed and built by the Bristol Aeroplane Company. Introduced in 1923 it was a popular engine for ultralight and small aircraft in the 1930s.[1]

Cherub
Preserved Bristol Cherub engine
Type	Piston aircraft engine
Manufacturer	Bristol Aeroplane Company
First run	1923
Major applications	Bristol Brownie Hawker Cygnet

Variants

Cherub I

Initial direct drive version introduced in 1923. Bore and stroke of 3.35 by 3.8 inches (85 mm × 97 mm) for a displacement of 67 cu in (1.095 L). 32 horsepower (24 kW) at 2,500 rpm.[2]

Cherub II

Geared down (2:1) version of the Cherub I.

Cherub III

An improved and slightly larger (1.228 L) direct drive version introduced in 1925.

Applications

Survivors

An airworthy Messerschmitt M17 replica is owned and operated by the EADS Heritage Flight at Manching and is powered by an original Bristol Cherub III.[3]

Engines on display

A preserved Bristol Cherub is on static display at the Shuttleworth Collection, Old Warden, Bedfordshire.

Specifications (Cherub III)

Data from Lumsden.[4]

General characteristics

• Type: 2-cylinder air-cooled, horizontally opposed, left-hand tractor
• Bore: 3.54 in (90 mm)
• Stroke: 3.8 in (96.5 mm)
• Displacement: 75 in³ (1.228 L)
• Width: 25.6 in (650 mm)
• Dry weight: 98 lb (39.5 kg)

Components

• Valvetrain: Overhead valve
• Oil system: Dry sump
• Cooling system: Air-cooled

Performance

• Power output: 36 hp (24 kW) at 3,200 rpm
• Compression ratio: 5.75:1
• Fuel consumption: 2.5 imp. gallons per hour
• Power-to-weight ratio: 0.36 hp/lb

See also

Comparable engines

• ABC Scorpion
• Aeronca E-113
• Armstrong Siddeley Ounce
• Walter Atom

Related lists

• List of aircraft engines

References

Notes

Bibliography

External links

• The Bristol Cherub - Flight, March 1923

На других языках

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[de] Bristol Cherub

Der Bristol Cherub war ein Flugmotor des britischen Herstellers Bristol. Es handelt sich um einen luftgekühlten zweizylindrigen Boxermotor. Dieser Motor war seit seiner Einführung 1923 bis Mitte der 1930er-Jahre relativ weit verbreitet. So wurde er auch in Deutschland bei der Messerschmitt M17 eingesetzt.

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- [en] Bristol Cherub

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[es] Bristol Cherub

El Bristol Cherub es un motor de aviación británico de dos cilindros, refrigerado por aire, diseñado y construido por Bristol Aeroplane Company. Introducido en 1923, fue un popular motor para ultralivianos y aviones pequeños en los años 30.[1]

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[it] Bristol Cherub

Il Bristol Cherub era un motore aeronautico 2 cilindri boxer raffreddato ad aria prodotto dall'azienda britannica Bristol Aeroplane Company.

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[ru] Bristol Cherub

The Bristol Cherub — британский поршневой оппозитный 2-цилиндровый авиадвигатель воздушного охлаждения, разработанный в 1923 году компанией Bristol. В 1930-е годы устанавливался на ультралёгких и малых летательных аппаратах.[2]

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