The video below does an excellent job of explaining exactly how the Falcon 9 survives re-entry The heat of re-entry is due to the compression of the atmosphere ahead of the re-entering vehicle, NOT air friction. Think of a diesel engine that works by highly compressing the air in the cylinder above the ignition temperature […]
Purrseidon 
Fascinating! That’s certainly unique thinking on the part of SpaceX!
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Obviously, they ‘think outside the box’, though I admit that I, purrsonally, do most of my best thinking inside my favorite box… my snuggle box, not the bathroom one! =^.^=
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Very interesting Purr.
Shoko
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