9 Revolutionary Aircraft Engine Breakthroughs That Changed Aviation History

2. Liberty L-12 Engine

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Developed during World War I, the Liberty L-12 represented a major breakthrough in aircraft engine design. This 12-cylinder, liquid-cooled engine delivered an impressive 400 horsepower while utilizing standardized parts for mass production. Its aluminum construction minimized weight, and its modular design facilitated quick manufacturing and easy maintenance. The engine's reliability and power-to-weight ratio made it ideal for military aircraft, and its influence extended far beyond the war. Modern engine design continues to draw on the principles of standardization and modularity pioneered by the Liberty L-12.