Specification
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Type: Liquid-cooled V-12 piston engine Manufacturer: Allison Engine Company |
First run: 1930 Number built: 70,000+ |
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General characteristics Type: 12-cylinder supercharged liquid-cooled 60° "Vee" piston aircraft engine Bore: 5.5 in (139.7 mm) Stroke: 6.0 in (152.4 mm) Displacement: 1,710 cu in (28 L) |
Length: 85.81 in (2,180 mm) Width: 29.28 in (744 mm) Height: 37.65 in (958 mm) Dry weight: 1,395 lb (633.5 kg) |
Components
Valvetrain: Two intake and two exhaust valves per cylinder with sodium-cooled exhaust
valves, operated by a single gear-driven overhead camshaft per each bank of cylinders
Supercharger:
Centrifugal-type, single-stage, 15-vane impeller, 10.25 in (260 mm) diameter
Fuel system: Bendix Stromberg carburetor with automatic mixture control
Fuel type: 100 octane
Oil system: Dry sump with one pressure and two scavenge pumps.
Cooling system: Liquid-cooled with a mixture of 70% water and 30% ethylene glycol,
pressurized.
Performance
Power output: 1,475 hp (1,100 kW) at 3,000 rpm
Specific power: 0.86 hp/cu in (39.3 kW/L)
Compression ratio: 6.65:1
Power-to-weight ratio: 1.05 hp/lb (1.76 kW/kg)
[Source - Wikipedia]
