4 ms·I wonder why they moved away from the liquid cooling idea to heat tiles.by fsmv 2y agoI wonder why they moved away from the liquid cooling idea to heat tiles.yetihehe 2y agoProbably because mass of tiles would be less than mass of coolant.zardo 2y agoAnd moving cryogenic fuel around is a frequent source of problems. You can't scrub re-entry because a valve is stuck like you can a launch.