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Sudragon

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Posts posted by Sudragon

  1. 15 hours ago, RocketBoy1641 said:

    On the matter of shutdown; some SRBs have a thrust termination system where they dump thrust either equally for and aft (net 0 thrust) or dump through side vents in a way that ends forward thrust.  The later seems more reasonable with PAMs/kickstanges and similar things that you can't burn toward the top of the stack.

     

    I don't think they are all that common b/c it is cheaper to have less working pieces and push less mass (unspent fuel).  Restart options would take a lot of extra weight and complexity unless you use a solid/liquid hybrid.  Those are an interesting lot.  You have fuel or oxidizer as the solid and the liquid is the other.  Cut the liquid and the reaction dies.  Restart with hypergol or Tea-Teb.

    Quote

    I don't think they are all that common b/c it is cheaper to have less working pieces and push less mass (unspent fuel).  Restart options would take a lot of extra weight and complexity unless you use a solid/liquid hybrid.  Those are an interesting lot.  You have fuel or oxidizer as the solid and the liquid is the other.  Cut the liquid and the reaction dies.  Restart with hypergol or Tea-Teb.

    The Virgin Galactic ship uses a hybrid engine. Solid  hydroxyl-terminated polybutadiene (HTPB) and Nitrous Oxide. Orrrr Nylon and NoS. 

  2. 2 hours ago, Pappystein said:

    Thank you kindly!

    Getting sick of reports that have nothing to do with weapons being classified as weapons. 

    Then again, I used to mod/support a Video Game that was classified as "Munitions" as well so SHRUG

    Headtilt

    Hmm what else was being developed in the 50's - 60's? Was it perhaps Inter Continental Ballistic Missiles? which used a LOT of the same technology as the space program.  (see also my comment on secret rocket fuel mixes). Any rocket technology was classified because improvements in thust or isp meant bigger payloads or longer ranges. Guidance is guidance, whether it's landers on the moon or warheads on Washington.  Manned tech? Propaganda material. Everything was important, so everything was classified. There was a war on.

  3. 7 hours ago, Jcking said:

    Despite the tripropellant's very high specific impulse, it has a rather poor mass fraction, so a pentapropellant configuration was investigated using hydrogen, fluorine, oxygen, lithium, and beryllium (with hydrogen, fluorine, and oxygen stored as liquids, and lithium and beryllium stored as solids not dissimilar to SRMs). despite performing all around weaker than tripropellant configuration it did have a small advantage in the long duration mission consisting of a 8000 fps burn after a 205 day coast. However, both were inferior to gelled hydrogen-lithium/fluorine, and bi-propellant hydrogen-fluorine in both direct injection and long duration missions.

    I love how a lot of the bad spy dramas (and comedies) of the era were all about the 'secret rocket fuel formula' whereas these days it's just Liquid methane/hydrogen and liquid oxygen. I'm over simplifying,  but a lot of the high end crazy chemistry seems to have  left the industry on the grounds of 'yeah it works, but there's too high a chance of the pad rats getting their faces eaten off'.

  4. Having problems with 1.12.2,  the launch button in the VAB isn't creating a project in the VAB build list. The dropdown on the build button immediately puts you on the pad with the design. 

    Logs: 

    https://www.dropbox.com/s/rdn9zd3e04cnmca/KSP.log?dl=0

    Thanks in advance. Hopefully it's just me misplacing something.

     

    EDIT: After a scratch restart (KCT cluster + module manager to start) then then adding mods one at a time to check for conflicts, it works.  

     

    I don't know why it works, but it does. Only took 6 hours. Remember, you're not just playing Kerbal Space Program, you're playing Kerbal Space Program, the 'how many mods will my computer support before it gets cranky' metagame. 

  5. 9 hours ago, garwel said:

    As DSEV is already supported, I guess it mean Buffalo, MOLE and/or Pathfinder? I haven't played with them but I'll take a look when I have time. Meanwhile, the smart patches that come with Kerbal Health should provide basic compatibility.

    Indeed, Buffalo, MOLE and Pathfinder. The MOLE lab modules don't have rad shielding options.  I can see the inflatables not getting shielding for example, but Bob is facing early retirement due to his dosage levels.

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