Bristol Cherub

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Cherub

BristolCherub.JPG
Preserved Bristol Cherub engine
Type

Piston aircraft engine
Manufacturer

Bristol Aeroplane Company
First run

1923

Major applications

Bristol Brownie
Hawker Cygnet

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]




Contents





  • 1 Variants


  • 2 Applications


  • 3 Survivors


  • 4 Engines on display


  • 5 Specifications (Cherub III)

    • 5.1 General characteristics


    • 5.2 Components


    • 5.3 Performance



  • 6 See also


  • 7 References

    • 7.1 Notes


    • 7.2 Bibliography



  • 8 External links




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




Cherub-powered Short Satellite



  • Avia BH-2

  • Avro Avis

  • Beardmore Wee Bee

  • Bristol Brownie

  • Cranwell CLA.2

  • Cranwell CLA.3

  • Cranwell CLA.4

  • Dart Pup

  • Everson Evo III

  • Granger Archaeopteryx

  • Halton Mayfly

  • Halton Minus

  • Hawker Cygnet

  • Messerschmitt M17

  • Meyers Midget


  • Mignet HM.14 Pou-du-Ciel

  • Parnall Pixie

  • Pander-DB two Pices

  • Powell Racer

  • RAE Scarab

  • RAE Hurricane

  • Short Cockle

  • Short Satellite

  • Supermarine Sparrow

  • Vickers Vagabond

  • Westland Woodpigeon

  • Westland-Hill Pterodactyl



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




  1. ^ Guttery 1969, p.80.


  2. ^ Lumsden 2003, p.101.


  3. ^ EADS - Messerschmitt M17 Retrieved: 9 August 2009


  4. ^ Lumsden 2003, p.102.




Bibliography


.mw-parser-output .refbeginfont-size:90%;margin-bottom:0.5em.mw-parser-output .refbegin-hanging-indents>ullist-style-type:none;margin-left:0.mw-parser-output .refbegin-hanging-indents>ul>li,.mw-parser-output .refbegin-hanging-indents>dl>ddmargin-left:0;padding-left:3.2em;text-indent:-3.2em;list-style:none.mw-parser-output .refbegin-100font-size:100%

  • Guttery, T.E. The Shuttleworth Collection. London: Wm. Carling & Co, 1969. .mw-parser-output cite.citationfont-style:inherit.mw-parser-output qquotes:"""""""'""'".mw-parser-output code.cs1-codecolor:inherit;background:inherit;border:inherit;padding:inherit.mw-parser-output .cs1-lock-free abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-subscription abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registrationcolor:#555.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration spanborder-bottom:1px dotted;cursor:help.mw-parser-output .cs1-hidden-errordisplay:none;font-size:100%.mw-parser-output .cs1-visible-errorfont-size:100%.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-formatfont-size:95%.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-leftpadding-left:0.2em.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-rightpadding-right:0.2em
    ISBN 0-901319-01-5

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



External links




  • The Bristol Cherub - Flight, March 1923






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