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Captainant

Certifiably Surly
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Posts posted by Captainant

  1. 10 minutes ago, Duval Street said:

    Wasn’t this stack tested at Stennis for the entire burn (minus the SRBs)?  Is the fueling procedure different on the test stand that the issues weren’t detected? Honest question, and haven’t caught any of today’s coverage yet.

    IIRC, the green run (the test burn) had a different start sequence since it was on a test stand, and not the launch stand. One of the modifications they're (maybe) trying today is using the startup sequence from the green run instead of the original planned sequence

    2 minutes ago, Hagbard Celine said:

    ramjet can comment.  eric berger maintains that these issues with the same engines, systems, hardware, gas, etc., were not solved until sts-109, which was the 108th of the 135 total shuttle missions.  it took 21 years and dozens of aborts, holds, and tinkering to get the entire package to some state of cromulence.

    I've just about finished reading Ignition, and there's a whole chapter on LH2 and learning how to tame it for a rocket. It imposes so many design constraints that it's really not worth it unless you NEED a low-coking fuel for reusability, or the uniquely high performance of the fuel cycle. We've got far better and less temperamental options than the RS25 now

  2. 10 minutes ago, Duval Street said:

    Wasn’t this stack tested at Stennis for the entire burn (minus the SRBs)?  Is the fueling procedure different on the test stand that the issues weren’t detected? Honest question, and haven’t caught any of today’s coverage yet.

    IIRC, the green run (the test burn) had a different start sequence since it was on a test stand, and not the launch stand. One of the modifications they're (maybe) trying today is using the startup sequence from the green run instead of the original planned sequence

    2 minutes ago, Hagbard Celine said:

    ramjet can comment.  eric berger maintains that these issues with the same engines, systems, hardware, gas, etc., were not solved until sts-109, which was the 108th of the 135 total shuttle missions.  it took 21 years and dozens of aborts, holds, and tinkering to get the entire package to some state of cromulence.

    I've just about finished reading Ignition, and there's a whole chapter on LH2 and learning how to tame it for a rocket. It imposes so many design constraints that it's really not worth it unless you NEED a low-coking fuel for reusability, or the uniquely high performance of the fuel cycle. We've got far better and less temperamental options than the RS25 now

    • Like 1
  3. I'm not feeling optimistic about a launch attempt today (or the next window in a few days), and even less so if they do light 'er up. Just wayyyyyyy too many unknowns, and STILL haven't fully completed a wet dress rehearsal. 

    By my understanding, they're basically using every launch attempt as a wet dress rehearsal, and if they make it far enough they'll attempt a launch. Doesn't feel like NASA standard and proven procedure, and I've studied the Challenger disaster too much to not think about possible severe outcomes when NASA cuts corners

    • Hook 'Em 2
  4. 2 minutes ago, Anastasis said:

    Feels like a flashback. How many democracies in the region are we going to have overthrown again to get there?  We'll call this go round "Fruit Company Part Two: No Nets Attached to Buildings Necessary".   

    I hear bill barr is free again, he could prolly cover up another contra scandal and really get those Central American countries real fucked up for a few more decades

    • Like 1
  5. 21 minutes ago, ShaggyBevo RIP said:

    IAEA inspectors noticed all the incoming ordnance at ZNPP was aligned with having come from RU occupied territory. RU officer claimed shells turn 180 degrees on impact. RU is so used to owning the narrative they don’t even bother with getting very basic details right in their false flags.

    It's pretty striking how these authoritarians just lie about things that are easily disprovable. They're used to state media that will repeat the lies unquestioningly and uncritically. 

    I hope we continue to get more nominal news out of the ZNPP though, it's nice to have non-russian sources for what's happening. 

    • Hook 'Em 1
  6. 2 hours ago, DigglerontheHoof said:

    Their governor looks like he's from Mississippi.  Don't ask me to explain it, but, white Miss men have "a look"; and it sure as hell doesn't conjure up images of the master race. 

    It's looks like a combination of FAS and poor nutrition. And a strange affinity for boat shoes

  7. 2 minutes ago, fattyflattie said:

    Except all the vids of him literally sniffing children’s hair.  I bet the next time someone slaps your hand away from their grandchild will be the first.  Not something 2 scoops can say. 

    Lol it's fun how you constantly say you don't like trump and then you always go back to saying "SEE? trump is better than Biden!"

    • Hook 'Em 7
    • Like 2
  8. 2 minutes ago, fattyflattie said:

    I don’t get it. None of the statues are of little girls?

    bidensmellingchilden.gif

    Yes, every politician that republicans don't like is a pedophile. We get it. It's the lever y'all have decided on, we've heard it for gays, trans, teachers, librarians, basically everyone who is opposed by the modern conservative movement. 

    Get some new material. Your shit is old and busted and sounds very aggy. 

    • Hook 'Em 6
    • Like 1
  9. 9 minutes ago, Humble Beast said:

    As I saw it described online, the market is forward looking. It’s telling us there aren’t going to be enough energy in Europe this winter. All that’s left over is the rationing. Who wins and who loses. 

    Idk if it's """the market""" or a fascist authoritarian using economic warfare to try to gain a strategic advantage by harming the allies of his victim in his war of aggression

  10. 15 minutes ago, Trey3216 said:

    A publicly traded company  returns profit to their investors via share price increases, share buybacks, or dividend payments.  They also spend money on R&D and intellectual property/workforce that enables the 3 profit distribution mechanisms to happen.   Anyone who hates profit motives of companies and invests in the market is guilty of chimerical hypocrisy.   

    Lmao. There's a difference between a reasonable profit margin and market exploitation just because you can. By your logic, nobody who practices capitalism can criticize, otherwise they're hypocrites?

    But genuinely, the fact that oil and petrochemical refineries can pollute massively and materially damage a community's population and natural ecosystem and have no obligation to fix any of that... Is a prime example of socialized costs and privatized profits. Which is exactly why pollution and climate change has gotten so severe in aggregate across the globe. The damages happen on a decades long timescale, the profits are this quarter BAYBEEEE!

  11. 40 minutes ago, texastough said:

    also this

    It's really interesting to consider in terms of military conflict, air superiority is usually means to and end of having air support to attack behind enemy lines and disrupt their supply lines. Thanks to HIMARS and loitering munitions and drones Ukraine is able to realize the same strategic and tactical outcome without air superiority, which really turns the modern paradigm on its head

    • Hook 'Em 6
    • Like 1
  12. 11 minutes ago, fattyflattie said:

    Lol wut? Not exactly. I actually realized recently that no matter who’s voted in (with exception of very few), my life tangentially doesn’t change. So, it’s mostly either win, or win win.  It’s been considerably more peaceful since that light went off.  I hope you all vote for what’s most important to you and yours. 

    tldr:

    Susan Collins GIF by GIPHY News

    • Rage+1 1
  13. You don't like the fascist, but you like his policies and will vote for all the people that enable him. Yeah. We know.

     

    Go buy some more guns, sell your guns, I don't give a shit. I have a safe full of guns, but I don't have a mental illness to make them the single most important part of my voting decision process.

    • Hook 'Em 3
    • Like 1
  14. 17 minutes ago, fattyflattie said:

    Fuck that guy, too.   See how simple that is. 

    love seeing the fattyfascy pivot to desantis away from trump as will the rest of the GQP - "yeah we never liked trump anyways! He's sooooo crazy right? Let's go younger face of authoritarianism!"

    • Hook 'Em 1
    • Rage+1 1
  15. 1 minute ago, jimmyjazz said:

    Yeah, fatty is a multiple-single-issue voter:  he's in favor of unfettered ownership of any weapon, he hates poor people, and he wants to foist the cost of as many social benefits as he can secure for himself on everyone else.  What a guy.

    AKA - fuck y'all I got mine. Classic conservative dogma

    • Hook 'Em 2
  16. The LH2 flow problem is very concerning, since if there's insufficient flow through the bell to cool it, there's almost certainly going to be insufficient flow to the combustion chamber to produce the designed thrust. It's not clear if the problem was on the core or the engine, but fuel flowing through the nozzle is part of its core operational cycle - those thin braised tubes that are the main combustion chamber would RUD very quickly if they weren't flowing enough cryogenic LH2.

    But honestly. It's ridiculous to be using such a temperamental fuel as LH2 if you aren't going to be reusing the engine. The main selling point of LH2 was that it burned perfectly cleanly and had no issues with coking so it was well suited to STS's reusability mission - but if we're just throwing em away, much more forgiving and less limiting fuel cycle options are available.

  17. 12 minutes ago, Hagbard Celine said:

    in eric's article this morning they claim it was a bad sensor and they really truly believe #3 was actually chilled

     

    also, @Captainant $4B is nowhere close to the real number spent thus far on all legacy repurposing of STS technology

    dating back 3 decades, it is somewhere north of $75B

    Jeeze, I knew the Artemis program had burned ~$23B so far in budget but hadn't considered other attempts to repurpose STS like Ares. Although I don't think it's repurposing STS so much as keeping the jobs in those districts that built the STS parts

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