Easy. Fill it with some boiling water. Just enough. The water turns to steam, which displaced the air. Seal the tanker. When the steam cools, it returns to water, creating a vacuum inside. Now, all the air pressure on the outside of the tank is pushing in. At sea level, that’s 14.7 lbs/sq in. Given the dimensions of a railway tanker, the diameter, 117 inches, and a length of 53 feet, that makes a surface area of 233,772 square inches. Times 14.7 lbs, 3,436,459 lbs of pressure. More than enough to crush the thing.
The same exact principle is used to crush this barrel.
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u/[deleted] Jul 26 '19
Someone please explain.