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The Liberty v12 Aircraft Engine

The Liberty v12 was designed in just five days during WW1 as an American Alternative to existing Allied built engines, it was produced by most of the large American car manufactures for The US armed forces, a total of 20,478 engines having been built by the end of 1919. The Liberty v12 was used by many WW1 aircraft including the Airco DH.9A light bomber and the Airco DH.10 Amiens III bomber. The Liberty v12 aero engine was also used in the WW1 Mark VIII tank and the British WW2 Cruiser Mk III, Cruiser Mk IV and Crusader tanks.

Liberty v12 Aircraft Engine

 

It is of note that William Durant initially refused to allow General Motors to make the Liberty v12 due to his pacifist beliefs, this led to Henry Leland resigning from Cadillac and forming the Lincoln company to make the Liberty v12 engines, however, William Durant later changed his mind and both Cadillac and Buick produced Liberty engines.

Liberty L-12 Specifications:

  • Type: Liquid-cooled SOHC per bank 45° V12 piston engine
  • Bore: 5 in (127 mm)
  • Stroke: 7 in (177.8 mm)
  • Displacement: 1,649.3 in³ (27 L)
  • Weight: 845 lb (383 kg)
  • Power output: 449 hp (335 kW) at 2,000 rpm
 

Liberty V12 Aero Engine


 
Liberty V12 aero-engine
 

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Liberty v12 Aircraft Engine picture and Specifications

 

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