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Cake day: February 28th, 2024

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  • If they send the ship to orbit, I wonder where they’ll de-orbit it, given that it won’t be RTLS. Perhaps:

    • in their ‘usual’ place for soft splashdowns, west of Australia
    • in the Gulf of Mexico
    • Pacific, west of California
    • Pacific, the cemetery
    • near the planned path of Forte, timed so that she can just pick up Ship 41 the day after its splashdown. Strap it alongside Ship 40, and take them both to SpaceX at the same time.

    P.S. The sidebar links here but I can’t access that. Would this be better? (I’m not very familiar with the technology or etiquette of Lemmy.)




  • The Mark 1 lander is powered by the BE-7 engine, which runs on liquid hydrogen and liquid oxygen. There may be compatibility issues related to the Falcon rocket’s kerosene-powered upper stage, although this has not been confirmed. Also, it is unlikely that Blue Origin would partner with a direct rival, SpaceX, in this manner.

    Note: This article has been edited to clarify interoperability issues between the Blue Moon Mark 1 lander and the Falcon Heavy rocket.

    I don’t think the edit did a very good job of clarifying the nature of the “compatibility issues”! Is there any general reason that a hydrolox payload can’t be delivered by a kerolox upper stage?

    I believe the specific concern here comes from a rumour that this particular payload (the Blue Moon Mark 1 lander) is designed to be topped up with hydrogen from the New Glenn second stage. (I think this rumour was in the original version of the article.)

    Could there be a solution involving just not topping up the lander’s hydrogen, but instead having the rocket do more of the work? Apparently the lander was designed to do its own TLI burn. But some people on Twitter are claiming that FH could just about do the TLI so that the lander doesn’t have to. Meaning the lander wouldn’t need as much propellant.

    I was also wondering about Starship. SpaceX has already done a pretty good job with the ‘pez dispenser’ variant. Eventually they’ll have to make a ‘miscellaneous deployment’ variant, right? And would it be that much more difficult?

    But I guess NASA would prefer the focus is on the depot & tanker & HLS variants, because HLS is more important than MK1. And as for SpaceX themselves, they probably care much more about the ‘pez dispenser’ than the ‘miscellaneous deployment’ variant. So the idea of MK1 on Starship seems pretty remote to me.

    N.B. Is it really “unlikely that Blue Origin would partner with a direct rival”? Even with Isaacman and all his relatively tough talk about handling suppliers?






  • Was it a good idea for Orion to have a jettison system? A liquid-only one?

    What about, instead, a small airlock, containing a basket with a pusher mechanism? And bags that can fit into the basket snugly?

    Some bags designed for men to directly urinate into? Or perhaps just have a tank that empties into them? Some bags to act as the outer bag for smaller bags of fecal matter? Some bags for general trash?

    P.S. And presumably in this case all the jettisoned material remains on an almost identical free return trajectory and will re-enter Earth’s atmosphere at a similar time/place to Orion, and burn up?