Allison V-1710 

The Allison V-1710 aircraft engine designed and produced by the Allison Engine Company was the only US-developed V-12 liquid-cooled engine to see service during World War II. Versions with a turbocharger gave excellent performance at high altitude in the twin-engined Lockheed P-38 Lightning, and turbo-superchargers were fitted to experimental single-engined fighters with similar results.

The United States Army Air Corps (USAAC) preference for turbochargers early in the V-1710’s development program meant that less effort was spent on developing suitable mechanically driven centrifugal superchargers for the Allison V-12 design, as other V-12 designs from friendly nations like the British Rolls-Royce Merlin were already using.

The V-1710 has often been criticized for not having a “high-altitude” supercharger. The comparison is usually to the later, two-stage, versions of the Rolls-Royce Merlin 60-series engines also built by Packard as the V-1650 and used in the P-51B Mustang and subsequent variants.

Manufacturer: Allison Engine Company (USA)

First run: 1930

Production: 69,305

Displacement: 1,710 cu in (28.02 L)

Length: 86 in (2,184 mm)

Width: 29.3 in (744 mm)

Height: 37.6 in (955 mm)

Fuel system: Stromberg PD-12K8 2-barrel injection carburetor

Cooling system: Liquid-cooled (70% water + 30% ethylene glycol)

Power: 1,500 HP (1,119 kW)

Compression ratio: 6.65:1

Weight: 1,395 lb (633 kg)

Bourget Museum (ParisFrance)

Read more: History of engines with Martin Perez ...