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I thought the 2nd stage engine's nozzle extension was radiatively cooled? First stage engines are regen for sure.
by erobbins 12y ago
I thought the 2nd stage engine's nozzle extension was radiatively cooled? First stage engines are regen for sure.
- dandelany 12y agoYou're correct for the last generation of engines - Merlin 1C Vacuum was radiatively cooled. However I haven't found any confirmation one way or the other for the 1D Vacuum engine, which they're using currently. It's possible they haven't made this info public yet due to ITAR.
- Crito 12y agoMerlin 1C Vacuum had a regeneratively cooled combustion chamber but radiatively cooled expansion nozzle. I'm not sure if Merlin 1D Vacuum differs from this though.