Why dont rocket engines melt How engineers keep engines cool

Rocket engines need to produce heat to function, after all, their only real purpose is to convert the chemical energy in the propellant into pressure and heat so they can produce thrust. And that brings up an obvious question How in the heck do engines survive this heat How did rocket scientists figure out how to keep an engine running continuously while harboring combustion inside it thats hot enough to melt the very walls that are containing it Today were going to talk about the tricks engineers employ to keep rocket engines from melting. Well go over ablative cooling, regenerative cooling, film cooling, radiative cooling, heat sinks, and fuel to oxidizer ratios and show you some awesome examples of each. Here s an article version of this video 00:00 Intro, Timestamps 01:55 Fuel to Oxidizer Ratio 07:20 Ablative Cooling 10:30 Regenerative Cooling 14:20 Film Cooling 22:15 Radiative Cooling 23:30 Summary