Questions tagged [be4-engine]

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What materials can withstand corrosive oxygen-rich hot-gas environments inside rocket engines?

Russians figured out the metallurgy behind those super alloys since the N1 moon rocket era. Blue Origin is running its BE-4 engines on oxidizer-rich preburners and SpaceX’s full-flow Raptor engines ...
0
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How will the BE-4 engine “Save taxpayer money”?

In this explanation of the Blue Origin BE-4 engine, the text says: LOWEST COST Blue Origin’s BE-4 requires NO taxpayer dollars. Fully funded The BE-4 is fully paid for by the private ...
11
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2answers
2k views

Why does the BE-4 use methane as fuel?

I understand the Mars ISRU reasoning for SpaceX's Raptor which is also going to be methalox based. But why would ULA, who is the prime customer for BE-4 besides Blue Origin itself, chose to support a ...