Pobjoy R

From Wikipedia, the free encyclopedia

The Pobjoy R was a British seven-cylinder, air-cooled, aircraft engine designed and built by Pobjoy Airmotors. 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.

[edit] Specifications (Pobjoy R)

General characteristics

• Type: 7-cylinder air-cooled, radial, left-hand tractor
• Bore: 77 mm
• Stroke: 87 mm
• Displacement: 2.835 L)
• Dry weight: 135 lb

Components

• Oil system: Dry sump
• Cooling system: Air-cooled

Performance

• Power output: 75 hp
• Fuel consumption: 4.9 imp. gallons per hour
• Power-to-weight ratio: 1 hp/1.8 lb

[edit] Applications

• 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

[edit] See also

• List of aircraft engines

[edit] References

• Guttery, T.E. The Shuttleworth Collection. London: Wm. Carling & Co, 1969. SBN 901319-01-5

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