In article ,
richard schumacher wrote:
Did anyone else get creeped out by the sight of the second stage nozzle
glowing orange hot? Yeesh! I hope they remembered that it gets less
cooling in vacuum (that is, in use) than in air (during tests).

Radiation-cooled nozzles often glow quite impressively. The first-stage
nozzles on the old Arianes glowed from takeoff on.
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