Pobjoy R

Pobjoy R


The Pobjoy R was a British seven-cylinder, air-cooled, aircraft engine designed and built by Pobjoy Airmotors. [Lumsden 2003, p.178.] Introduced in 1926 it was a popular engine for ultralight and small aircraft in the 1930s. A notable feature of the Pobjoy R was the propeller reduction gear which allowed the engine to operate at high RPM.

Specifications (Pobjoy R)

"Data from:" Lumsdenpistonspecs

type=7-cylinder air-cooled, radial, left-hand tractor
bore=3.03 in (77 mm)
stroke=3.43 in (87 mm)
displacement=173.05 cu in (2.84 L)
diameter=25.5 in (6477 mm)

weight=135 lb
oilsystem=Dry sump
power=85 hp
fuelcon=4.9 imp. gallons per hour
power/weight= 1 hp/1.8 lb


* BA Swallow
* Comper Swift
* Comper Kite
* Cosmopolitan Light Plane
* Couzinet 101
* General Aircraft Monospar
* Hendy Hobo
* Lippisch Delta IV
* Mauboussin M.121P Corsaire Major
* Miles Satyr
* Short Scion
* Short Scion Senior
* Spartan Clipper

See also

* List of aircraft engines




* Guttery, T.E. "The Shuttleworth Collection". London: Wm. Carling & Co, 1969. SBN 901319-01-5
* Lumsden, Alec. "British Piston Engines and their Aircraft". Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

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