ABC Wasp

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The ABC Wasp was an experimental 170 hp (127 kW) seven-cylinder radial engine designed by noted British engineer Granville Bradshaw and built by ABC Motors Limited. At a weight of 290 pounds (131kg), it had one of the most advanced power-to-weight ratios of the day 1.7 pounds per horsepower. This World War I-era engine is noteworthy because it was the first in which the cylinders were coated with copper in an attempt to dissipate heat. The ABC Wasp never evolved beyond the experimental stage, but it was the predecessor of the unsuccessful Dragonfly engine.

This article incorporates text from http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=816, a public domain work of the United States Government.

[edit] Specifications (ABC Wasp)

General characteristics

• Type: 7 cylinder air cooled radial
• Bore: 4.5in (114mm )
• Stroke: 5.9in (150mm)
• Displacement: 657cu in (10.76 liters)
• Dry weight: 290lb (131kg)

Components

• Fuel system: Carburetor
• Cooling system: air

Performance

• Power output: 170hp (127 kW)

[edit] References

• http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=816
• Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens, 9. 

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