Eli5: Why do high speed trains pressurize the cabin?
In: Engineering
One response saying the speed would increase the pressure on the cabin, another saying it would decrease pressure in the cabin.
Answer: they’re all sealed to minimize pressure changes in the cabin. Some are pressurized some aren’t. The external pressure definitely increases when going into a tunnels for example.
So there’s a component of minimizing pressure changes for the passengers, but also just maintaining the structural stability of the car with sudden external pressure changes.
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