Liberty L-12
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Liberty L-12

Engine
Engine 🚂 Foreign Design 📦 Utility 🔧

The Liberty L-12 engine is an American water-cooled V-12 aircraft engine developed by the United States during World War I. It was designed to have a high power-to-weight ratio and be easy to mass produce. It has a displacement of 27 L and produces 400 hp, using a single overhead camshaft and rocker arm valvetrain, similar to the Mercedes D.IIIa engines. Though originally designed to power aircraft, the Liberty L-12 found its way into a number of ground and naval vehicles, most famously the Australian Cruiser Tank Mk. III "Thunderbolt".