Recent content by jackwhirl

  1. jackwhirl

    Would You Ever Buy a Computer That Ships by Mail (Fear of Damage)?

    I don't have a problem with ordering things online. Just use a credit card, not a debit card. (If at all possible.) It's nice to have the big CC company on your side if anything goes wrong.
  2. jackwhirl

    Space Stuff and Launch Info

    Looks like the checkup results came back good.
  3. jackwhirl

    SciFi Idea: What do you think about very long lifespans?

    Hence, space habitats around Saturn. 👍
  4. jackwhirl

    SciFi Idea: What do you think about very long lifespans?

    You can take the man out of the cave, but you can't take the cave out of the man?
  5. jackwhirl

    Space Stuff and Launch Info

    NASA Picks SpaceX to Land Next Americans on Moon
  6. jackwhirl

    Advice about Dremel cutting wheels

    Do you know anyone with a laser cutter? You could do all the rings from a sheet of brass in a few minutes.
  7. jackwhirl

    Advice about Dremel cutting wheels

    I presume you're trying to save time by cutting all the layers together, but I'm not sure it's worthwhile... Superglue? Or just solder/braze them together.
  8. jackwhirl

    Happy Birthday Greg B. & @Greg Bernhardt

    Oh, hey. I didn't miss it this year. Happy birthday.
  9. jackwhirl

    Advice about Dremel cutting wheels

    Maybe I'm missing some subtle issue, but with the right mandrels, which everyone else is mentioning anyway, wouldn't you be able to use a standard tube cutter? Just slide a scrap piece down the mandrel to rest against the piece you want to cut, and it will be supported on both sides. You would...
  10. jackwhirl

    If the lightest metal around were iron, would aerospace even be possible?

    Or the Sea Dragon. It's one of my favorite rocket concepts. It was designed to use 8mm steel sheeting, which would give it a really high dry mass, but the 23m diameter and the square-cube law come into save the day. It's got ridiculous lifting capacity (550Mg) and was totally feasible with...
  11. jackwhirl

    SpaceX Starship tests: SN15 flight early May

    Are those flaps are still being constructed off-site and shipped in?
  12. jackwhirl

    SpaceX Starship tests: SN15 flight early May

    One of the arguments for stainless steel was ease of in situ repair, right? This is a good opportunity to test that.
  13. jackwhirl

    SpaceX Starship tests: SN15 flight early May

    SN9 didn't take the news well. That'll buff out, right?
  14. jackwhirl

    SpaceX Starship tests: SN15 flight early May

    They sure aren't wasting any time. This means they've probably got a good idea what went wrong with the tank pressure and that they can fix it with minor adjustments on the pad. Perhaps even in software. Or they need more room to stack new rockets. Maybe both...
  15. jackwhirl

    SpaceX Starship tests: SN15 flight early May

    Do we know if the header tanks were pressurized autogenously for this test, or is that something they are still looking to add in the future?
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