Interesting, their current engine is a cryo- hydrogen / oxygen burner, but like SpaceX, they’re headed off to a much more powerful methane-burner. Sensible.
https://www.blueorigin.com/technology#engine_stories_2
[snip] The BE-4 uses oxygen-rich staged combustion of liquid oxygen and liquefied natural gas to produce 550,000 lb. of thrust. The BE-4 is currently under development and will be flight-ready in 2017. [/snip]
That is truly a space hotrod !
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