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The ABC Scorpion is a 30 hp (22 kW) two-cylinder aero engine designed by British engineer Granville Bradshaw for use in light aircraft. The engine was built by ABC Motors Limited and first ran in 1921.[1]

Scorpion
ABC Scorpion I on display at the Shuttleworth Collection
Type	Flat-twin aero engine
National origin	United Kingdom
Manufacturer	ABC Motors
Designed by	Granville Bradshaw
First run	1921

Variants

Scorpion I

1923, 30 hp (22 kW)

Scorpion II

1924, 34 hp (25 kW), increased bore and stroke.

Applications

Survivors

The only ANEC II (G-EBJO) flies regularly at the Shuttleworth Collection at Old Warden and is powered by a Scorpion II.

Specifications (Scorpion I)

Data from Lumsden [2]

General characteristics

• Type: 2 cylinder air cooled flat-twin
• Bore: 3.6 in (87.5 mm)
• Stroke: 3.7 in (91.5 mm)
• Displacement: 73.32 cu in (1.1 L)
• Dry weight: 90 lb (41 kg)

Components

• Valvetrain: Overhead valve, two valves per cylinder
• Fuel system: Carburettor
• Fuel type: 74 Octane petrol
• Cooling system: Air

Performance

• Power output: 30 hp (22 kW) at 2,750 rpm
• Compression ratio: 4:1
• Power-to-weight ratio: 0.33 hp/lb (0.53 kW/kg)

See also

Comparable engines

• Aeronca E-113
• Armstrong Siddeley Ounce
• Bristol Cherub
• Haacke HFM-2
• Walter Atom

Related lists

• List of aircraft engines

References

Notes

Bibliography

На других языках

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- [en] ABC Scorpion

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[it] ABC Scorpion

L'ABC Scorpion fu un motore aeronautico 2 cilindri boxer raffreddato ad aria sviluppato dall'azienda britannica ABC Motors Ltd. nei primi anni venti del XX secolo.

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