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  1. moon161

    Windrunner

    Mock me. All geniuses are mocked in the beginning https://aero-motion.com/
  2. moon161

    Electrical Centrifugal pump

    Some possibilities are: VFD to control pump RPM Impeller trim to reduce head at same RPM Pressure reducing valve. The pump affinity laws will show you how RPM or diameter reduction will change your pressure and flow from the original. https://en.wikipedia.org/wiki/Affinity_laws
  3. moon161

    Drawing note with quotes

    Do you have access to any of the purchasing and quality information that might go along with the drawing to get the parts? This could be PO's, supplier drawings, materials test cert's, heat treatment cert's, etc. You might at least be able to revise the drawing to reflect the present status of...
  4. moon161

    Dry gas instead of liquid for leak test in pump w/ mech seal.

    Thanks! Any idea what the gas leakage through a static seal is compared to the liquid leakage?
  5. moon161

    Dry gas instead of liquid for leak test in pump w/ mech seal.

    Does anyone here have experience with using dry gas / cavity decay test instead of presurized water to leak test pumps with rotating mechanical seals? Thanks,
  6. moon161

    SolidWorks Flexible Parts

    More work, but try copy with mates?
  7. moon161

    Industrial practices in CAD modeling of machined parts

    After I think 18 or 20 years of solid modelling, I'd say 'whatever it takes' to get the net shape you need. I've been working a lot with castings lately. Generally with castings, weldments too, you make an as cast or as welded configuration, and model the machining steps that remove material in...
  8. moon161

    Boeing again

    3D, when I was in school, my controls professor said in lecture that he was working with the navy. They wanted a smoother ride on the automatic carrier landing system so that the pilots would use it more often.
  9. moon161

    Boat steering

    Could you develop the mission better before detailing the boat? You might ask what someone will need to self rescue when your device comes up to them. You might also take a look at what other people have developed for similar missions...
  10. moon161

    How to Fix Broken External References

    My guess is that you lost your default search locations when IT worked on the computer. If you have references in different locations it'll be a mess until you tell SWX where to look, then it should be fine. This is useful about where SWX looks for references in what order. You probably lost...
  11. moon161

    Destacking I-Beams

    At the boatyard, we have a 1/2 ton chainfall on a trolley and a chain that has a ring in the middle and a hook on each end to pick and move the steel. Once you pick it, it's not hard to move with the trolley. I expect with a crane that has a rotating beam you could use a chainfall or hoist on a...
  12. moon161

    Alaska Airlines flight forced to make an emergency landing (Part II)...

    Everyone please breathe, and then do it a few more times. https://xkcd.com/386/
  13. moon161

    How do I add a generic mass to a Solidworks part?

    Evaluate > Mass Properties > Override Mass Properties
  14. moon161

    Hertz selling off EVs due to higher repair costs

    I don't think it's because the EV's are electric, but because the cars are made by companies new to the auto body business. https://www.theautopian.com/heres-why-that-rivian-r1t-repair-cost-42000-after-just-a-minor-fender-bender/
  15. moon161

    Structural Drafting - Software Recommendations

    I think 2010-2012 or so was the last 'unplugged' version of ACAD. Now it needs to phone home for license verification pretty frequently if not always.
  16. moon161

    Seeking a sane explanation for NEC 110.14(C)

    An electrician friend explained that when capacities of conductors, terminals and so on are mixed one can form a wrong idea about the circuit based on incomplete inspection. If incomplete inspection leads you to unsafe ideas about the wiring, then that's the problem.
  17. moon161

    Weldment Cut list for selected bodies

    Can you hide the unused rows after ballooning the items you have in the view?
  18. moon161

    Printed House (Concrete) failed in-situ strength tests

    That's interesting. They might have to change some things, but I wouldn't stop trying. Maybe they didn't strength test at proof of concept or proof of process capability when they should have. King Arthur didn't stop when John Cleese said 'Your mother was a hamster and your father smelled of...
  19. moon161

    Need some help troubleshooting soft starter overloads

    Is the lube oil pump centrifugal or displacement?
  20. moon161

    Composite stuck to mdf mold

    Depending on the coefficient of friction, is your 11° draft self-locking if you have a residual force between the mold and the part?

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