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ALLISON V-1710
Specification

Type: Liquid-cooled V-12 piston engine
Manufacturer: Allison Engine Company
First run: 1930
Number built: 70,000+

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]

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