eli5 Why do trucks and busses do the “tsshhh” thing when they stop?

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eli5 Why do trucks and busses do the “tsshhh” thing when they stop?

In: Engineering

19 Answers

Anonymous 0 Comments

Big trucks have air compressors. When air tank full – go psh. When brakes are applied and released it go psh. When you set the parking brake it go psh. Trailer brake psh is most satisfying 🙂

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