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Comment on Blue Origin has hot fired its BE-4 rocket engine for the first timeparent

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The Raptor has fired more but it is also not finalised in terms of design. The BE-4 is full sized and they don't seem to intend any more changes in the design.

Really the New Glenn competes more with Falcon Heavy then BFR. They are designing a New Armstrong rocket that will be more in the BFR class.

It will be very interesting, in 2020 we have planned New Glenn, Ariane 6, Vulcan and BFR. Falcon Heavy of course will have been flying for a while by then.

Raptor test fires have been at ~1,000kN, with a planned thrust of 1700kN, and for 100s burns. I don't think it's fair to say that BE-4 is further along in the development/testing process just from the fact that it has fired at half thrust, since it sure looks like Raptor has too.

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