Racescort666

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Everything posted by Racescort666

  1. Racescort666

    SpaceX Discussion Thread

    +Z is up in the construction orientation, not the flight orientation. Kinda makes sense to me. Although -X is usually the direction of travel for me.
  2. Racescort666

    SpaceX Discussion Thread

    Hopefully the select "control from here" on the command module before hitting space bar.
  3. Racescort666

    Concept for a Jupiter-Saturn-Haumea flyby probe

    He's making a fusion bomb.
  4. Racescort666

    SpaceX Discussion Thread

    Considering that Oxygen and Methane are liquid at approximately the same temperature, I'd say it improves simplicity.
  5. Racescort666

    SpaceX Discussion Thread

    Back when I was playing KSP every day I would confuse KSP view controls with Solidworks/NX view controls
  6. They fall because they make poor decisions:
  7. Racescort666

    Concept for a Jupiter-Saturn-Haumea flyby probe

    This sounds awfully heavy, unless you're building a... oh...
  8. Well, I didn't think I would come across a paper like this but here we are: https://www.diva-portal.org/smash/get/diva2:893827/FULLTEXT01.pdf I seem to remember Travis Pastrana and/or Ken Block talking about using the brakes/gas to control attitude of a car in the air but I can't for the life of me find the video. The short version: it absolutely is a thing; although, as stated, it's much more pronounced with motorcycles (like in motocross/dirt bikes).
  9. I just read that and immediately thought of this thread.
  10. Racescort666

    New Horizons

    Yeah, I remember Kazaa and Napster...
  11. Racescort666

    Quotable Mythbusters

    I use the phrase “the difference between screwing around and science is writing it down” pretty regularly at work. So I figure it’s fitting that the origin of that phrase be shared here: https://www.tested.com/art/makers/557288-origin-only-difference-between-screwing-around-and-science-writing-it-down/?sf204908632=1 Testing can certainly be tedious but it can also be rewarding and fun. Most importantly, professionally, it’s for a purpose and if you do a poor job collecting data, it’s just a waste of time and money.
  12. Racescort666

    ULA launch and discussion thread

    Bummer, I will be busy tomorrow during the launch window. "non-optional social event" that won't have tvs or laptops.
  13. Well, that makes the decision on which launch to watch easy.
  14. Racescort666

    SpaceX Discussion Thread

    I could see the drive away from using hypergolics though. Partial insertion/circularization is done after a 6-ish hour coast, which isn't that long considering. According to this paper ULA experiences 1.0%-2.6% O2 boiloff per day. So I don't think that carrying the extra 0.5%ish of LOX would be as big of a performance hit as using a solid or hypergolic kick stage. Not to mention the added complexity of another staging event and hardware. Even the fact that the second stage is way overpowered at that point, carrying a little extra fuel (if the tanks are big enough) for partial insertion/circularization would be worth it.
  15. Racescort666

    Virgin Galactic, Branson's space venture

    Sounds like the dude is straight up BA. He must be Jeb’s cousin or something.
  16. Racescort666

    ULA launch and discussion thread

    @tater that was very interesting. I love hearing Tory Bruno talk about rockets, that dude know his stuff. I know Elon is a bit of a favorite around this forum but Tory knows his product line backwards and forwards. He's also under no illusions that SpaceX does certain things better than ULA but I think they are in a good spot for delivering a lower risk launch vehicle.
  17. Racescort666

    Which Launch?

    You have a typo there, the SSME is the RS-25 which was developed from the HG-3 which was supposed to be a performance improvement over the J-2. The RS-68 was developed as a cost effective engine to be used in expendable launch vehicles thus its use in the DIV. It doesn't really have much in common with the RS-25 other than fuel. Construction is different (channel wall of the RS-68 vs tube wall of the RS-25), the RS-25 is completely regeneration cooled while the RS-68 has an ablatively cooled nozzle, RS-25 is staged combustion while the RS-68 is gas-generator. They maybe incorporated some "lessons learned" from the RS-25 but I wouldn't call that derived from.
  18. Racescort666

    SpaceX Discussion Thread

    I see this frequently as well. It will be fiberglass -> plastic (piece part cost save, yay!) then plastic -> fiberglass (warranty cost save, yay!). Sometimes cost save ideas are really good and/or confusing and sometimes they're not well thought out and end up costing more in the long run. And you're right, sometimes vendor contracts dictate why designs end up being a certain way. I can think of several parts off the top of my head that haven't changed in many years because they're locked in at a contract price that's favorable.
  19. Racescort666

    NASA's OSIRIS-REx

    Something I found interesting from that article: For reference, the Atlas V 411 that OSIRIS-REx launched on was around 55 m tall.
  20. Racescort666

    SpaceX Discussion Thread

    That's a funny looking boat you've got parked there.
  21. Racescort666

    Well, it finally happened...

    I got busted by my IT department for having games on my work laptop. It wasn’t KSP, although KSP was definitely the first game I put on and the reason I started gaming on my work computer. I went for about 4 years of really solid KSP play throughs. Starting around the time we started issuing CAD laptops to the engineers to run SolidWorks, CATIA, and NX. I ultimately got busted for World of Warships which I forgot to log out of and it ran an update which got flagged by IT. I don’t think I’m actually in trouble, my manager had known about this basically since the beginning. I never played at work anyway so I doubt this is any kind of fireable offense. Plus I told him about it as soon as I got the email from IT and he just said “thanks for the heads up”. So here we are, no more KSP on the work computer and I’ve gotta buy a gaming laptop. Actually, as of this writing, I’ve already ordered one: Dell G3 17” and I’m pumped for it to show up.
  22. Racescort666

    Well, it finally happened...

    You totally have my permission to steal this thread.
  23. Racescort666

    SpaceX Discussion Thread

    Is anyone there in person?
  24. Racescort666

    SpaceX Discussion Thread

    I always feel like I'm catching up on it as well. I usually just end up skipping through a few dozen BFR speculation posts and I'm right up to current events. Just look for the tweets which are usually relevant. As for the happy reactions to the delay, I feel like @Ultimate Steve is always in school during launches. I wouldn't recommend skipping class to watch, you've gotta graduate man! FIFY
  25. Ha! True story. McDonnell and Rockwell (in its various iterations) built basically everything else that went to space while Grumman only built the LEM which was effectively used once it was already in space. So maybe they’ve got them on a technicality.