Why Do Semi Trucks Use Air Brakes?

By Simple Things - Surprising Histories

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Air brakes are a brilliant, mechanical failsafe that play a critical role in modern heavy transportation. In this video, we explain why semi-trucks use air brakes and how they work step by step using real science and verified historical facts. Why Semi Trucks Use Air Brakes: The Genius Failsafe | Simple Things Surprising Histories This documentary style episode from Simple Things Surprising Histories covers the complete story of the air brake, from its 19th-century railway origins to its final use as a life-saving technology in modern 80,000-pound commercial trucks. Topics covered in this video: • Why massive semi-trucks cannot use standard hydraulic brake fluid • The dangers of fluid leaks and messy maintenance in the trucking industry • How compressed air acts as the ultimate braking failsafe • The mechanics of air compressors, air hoses, and heavy mechanical brake springs • What happens to the brakes if a trailer breaks away or an air hose snaps • The surprising history of George

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