Technology
How rockets keep their nozzles from melting
HERE’S THE INTERESTING PART
The fiery exhaust of a rocket launch is so aggressively hot it should instantly melt the metal nozzle holding it. To stop this catastrophic failure, the bitterly cold liquid fuel is actually pumped through a maze of tiny microscopic tubes woven directly into the walls of the nozzle before being burned. The engine uses its own freezing blood to stop from melting.
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