ABC Hornet

Hornet
Type	Flat engine
National origin	United Kingdom
Manufacturer	ABC Motors Limited
Designer	Granville Bradshaw
First run	1929
Developed from	ABC Scorpion

The ABC Hornet was an 80 hp (90 kW) four-cylinder aero engine designed in the late 1920s by the noted British engineer Granville Bradshaw for use in light aircraft. The Hornet was effectively a double Scorpion and was built by ABC Motors, first running in 1929.^[1]

In 1931 the engine was re-designed, including the adoption of the new Hiduminium alloys for the crankcase, exhaust manifolds and pistons.^[2]

Applications

• Airship Development AD1
• Civilian Coupe
• Robinson Redwing
• Southern Martlet
• Westland Widgeon

Specifications (Hornet)

Data from Lumsden^[3]

General characteristics

• Type: 4-cylinder, horizontally opposed, air-cooled piston engine
• Bore: 4.02 in (102 mm)
• Stroke: 4.8 in (124.5 mm)
• Displacement: 243.18 cu in (4 L)
• Length: 25.5 in (648 mm)
• Width: 39 in (990 mm)
• Height: 28 in (711 mm)
• Dry weight: 225 lb (102 kg)

Components

• Valvetrain: Overhead valve, two valves per cylinder
• Fuel type: Petrol (74 Octane rating)
• Cooling system: Air cooled

Performance

• Power output: 82 hp (61 kW) at 2,175 rpm (maximum continuous climb power)
• Specific power: 0.34 hp/cu in (15.25 kW/L)
• Compression ratio: 5.6:1
• Power-to-weight ratio: 0.37 hp/lb (0.6 kW/kg)

See also

• ABC motorcycles

Related development

• ABC Scorpion

Comparable engines

• Continental A-40

Related lists

• List of aircraft engines

References

Notes

1. Lumsden 2003, p. 54.
2. "ABC 'Hornet' Modified". Flight: 335. 17 April 1931.
3. Lumsden 2003, p.276.

Bibliography

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

External links