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Minmus Taster

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    SpaceX Discussion Thread

    in Science & Spaceflight

    Posted

    3 hours ago, darthgently said:

    FTS on SS may have been incomplete.  I'm wonder if something like integrating an off the shelf (or custom probably) black box on the second stage could over time make situations like this, and Rocket Labs recent situation, less mysterious.  Of course they'd need to be very tough and recovered.

    Not sure how to feel about that, on the one hand the ship was effectively destroyed and even surviving chunks would burn up shortly afterwards. On the other hand this could be grounds for another months long investigation which wouldn't be good for the program given previous delays.

    Also: It's possible more pieces survived because the fuel tanks were nearly empty, without the extra help only the installed system would be tasked with the termination (B9 clearly still had a lot of fuel inside it's tanks when it came apart)

    SpaceX Discussion Thread

    in Science & Spaceflight

    Posted

    11 minutes ago, AckSed said:

    It doesn't look quite as zippy as SLS, but then I realise SH's carrying a lot more and I give it some slack.

    Those shockwaves look immense.

    RGV Aerial's view of the launch pad afterwards: 

    https://i.redd.it/6eobv3gi451c1.jpg

    Looks mostly intact, if a little charred. They'll probably have to reenforce the tank farm in between flights though, I don't think that unused tank is gonna take another flight.

    SpaceX Discussion Thread

    in Science & Spaceflight

    Posted

    8 minutes ago, Royalswissarmyknife said:

    The plume is seen as weird because it looks like it just appears out of nowhere and then is followed by FTS activation. It could be the camera acting strange though.

    It would be very bad if the sea level engines got shutoff because they are the only engines on the ship with gimbal.

    Is it possible it's a tank rupture and not a rocket plume? Seemed too large to be from the engines.

    SpaceX Discussion Thread

    in Science & Spaceflight

    Posted

    3 minutes ago, JoeSchmuckateli said:

    Turns out it is harder than I thought to google a quick answer to the terminal velocity of an object dropped into the ocean as it hits the bottom.

    Anyone know how fast the gridfins were going on sea-floor impact?

    Depends on how they flow through the water. When a ship sinks they usually travel between 30 to 60 MPH on descent and I'd assume the grid fins wouldn't have fallen much faster after ocean impact. Not sure how much would be left though, rewatched the footage and it seems the boosters destruction was pretty much total (even more damaging then last time) which is good for public safety regarding the FTS but not good if you want to hunt for rocket parts. That and the fact the impact with the water would total them even more. But assuming that one survived the breaking up of B9 and the impact the surface I'd wager it's possible that it's going to be detectable if one had the time and money too look for them. That being said it would be better to consider looking for the B7 gridfins instead because it was slightly less explosive and more of a big 'pop'.

    The Upcoming Movies (and Movie Trailers) MegaThread!

    in The Lounge

    Posted · Edited by Minmus Taster

    Started the new For All Mankind season today, I enjoyed the first episode, I feel like the story has become somewhat stable again after jumping the shark in season 3.

    Spoiler

    And they've already killed Grigori, this season is gonna destroy me isn't it : (

    Really liked the depiction of the asteroid, though I'm not sure how it didn't just disperse into debris the second they tried pushing it. Also, I've been reading some articles and Danny seems to be out of the picture for now (thank Jeb) though I do wonder what became of him and if there's a plotline involving figuring that out.

     

    NASA's OSIRIS-REx

    in Science & Spaceflight

    Posted

    On 10/10/2023 at 5:22 PM, IonStorm said:

    I'd love an intercept to an interstellar object. This is difficult though there are some ideas. Remember that, these can be at any inclination, including retrograde, and at very high speeds.  So you need a whole lot of ∆V. You don't have a lot of time from discovery so there probably isn't time to do a bunch of gravity assists.  But I'm just guessing.

    A_comparison_of_two_interstellar_objects

    Storage costs are also not nothing. The refurbishment of DSCOVR was in the dozens of $M (I don't have a good source on the number and haven't looked too hard) but the 2-year delay of InSight was about $150M ($RY). 

    Sort of random question but given that both of these objects came from the same general patch of sky based on this graph is it possible that they may somehow be related? Maybe not two chunks of the same object but at least from the same general cluster of stars?

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