ABC Hornet
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| Hornet | |
|---|---|
 | |
| Type | Flat engine |
| National origin | United Kingdom |
| Manufacturer | ABC Motors Limited |
| Designer | |
| 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]
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)