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Well, Blue Origin is in a certain dimension re-writing rules. They are using a new more efficient engine design. SpaceX has been pretty conservative with engine
by timthelion 9y ago
Well, Blue Origin is in a certain dimension re-writing rules. They are using a new more efficient engine design. SpaceX has been pretty conservative with engines if I'm not mistaken.
- letlambda 9y agoThe Raptor engine(under development) is comparable to the BE-4.
- DiThi 9y agoThe Raptor engine in development is also very efficient (full flow staged combustion of methalox). And while the Merlin series has been conservative in most aspects, Merlin 1D has a few unique characteristics, like the pintle injector (previously used in the Apollo LM), phased-shutoff (or whatever the spelling is, from Tom Mueller's interview from half a year ago), use of subchilled propellants and a very tightly manufacture process that makes it very cheap to produce. On top of that it's now the engine with highest thrust-to-weight ratio in history that has flown, despite being open cycle (gas generator). And not a single M1D failed so far.