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  1. Charles_McG

    What I did today -instead- of Rocketry.

    Too busy gawking at the eclipse to get a good photo during totality.
  2. Charles_McG

    EVENT Tripoli Wisconsin TWA - Bong - Saturday April 6th, 2024

    The extra water makes for some cool reflections.
  3. Charles_McG

    What I did today -instead- of Rocketry.

    I’ve been printing up a storm. And My wife has been painting.
  4. Charles_McG

    What I did today -instead- of Rocketry.

    That’s not ‘Caution: Loose extension cords’?
  5. Charles_McG

    What I did today -instead- of Rocketry.

    A full SDS has more detailed information than the link you provided. But remember, the audience for the information is chemists and first responders. Not the lay public. Here's a full SDS. https://www.sigmaaldrich.com/US/en/sds/sigald/221295?userType=anonymous You can see that the...
  6. Charles_McG

    What I did today -instead- of Rocketry.

    Or you should get more practice interpreting SDSs. This one lists the hazard effects - but not the severity. The NFPA code listed in the wikipedia article is 1-0-0. Which is the same as potassium chloride - salt substitute.
  7. Charles_McG

    What I did today -instead- of Rocketry.

    One word - dose
  8. Charles_McG

    What I did today -instead- of Rocketry.

    Wikipedia Meat processing[edit] Potassium nitrate has been a common ingredient of salted meat since antiquity[38] or the Middle Ages.[39] The widespread adoption of nitrate use is more recent and is linked to the development of large-scale meat processing.[6] The use of potassium nitrate has...
  9. Charles_McG

    What I did today -instead- of Rocketry.

    Saturday.
  10. Charles_McG

    When is the Starship orbital launch?

    There’s a ceramic wool wrap under the tiles that the mounting pins poke through. You used to see it on barrel sections sitting outside- before all that was moved into starfactory. There may have been a patch of missing tiles out of view of the camera where the batting/wrap was coming off from.
  11. Charles_McG

    When is the Starship orbital launch?

    The vapors getting sucked out into the void through the opening door slit were uber sci-fi. In the various clips they show of the interior, looking at the door once it's open enough , you can see from the changing shadows that the ship is in a roll. I would have thought that a reaction to...
  12. Charles_McG

    When is the Starship orbital launch?

    It had a reputation much as you suggest. Partly because the grapes used have a really rich color - but were crap for wine otherwise.
  13. Charles_McG

    Maybe Getting Closer to a Quantum Theory of Gravity?

    If gravity were a force - which it isn't. General relativity and quantum field theory are mathematically incompatible. GR is non-linear and can exhibit chaos. It has singularities, and dividing by zero makes physicists edgy. QFT is linear and non-chaotic - but what counts as an observer is...
  14. Charles_McG

    When is the Starship orbital launch?

    Juice was hard to transport at the time. Bricks of sugared concentrate would, though>
  15. Charles_McG

    EVENT Tripoli Wisconsin TWA - Bong - Sunday March 10th, 2024

    Did the Tech team get their two stager off the ground? I didn't get out of the winery today to go see.
  16. Charles_McG

    Beeping Altimeters

    Also, OCV (open circuit voltage) is pretty flat vs % capacity for most batteries, and just running armed, the altimiter itself is likely a pretty light load. While I've -seen- the discharge curves for 9V (which varies by supplier) and for some Lipos - I certainly don't have them memorized...
  17. Charles_McG

    Beeping Altimeters

    Is this a Wifi connected device?
  18. Charles_McG

    What I did today -instead- of Rocketry.

    Turned these into these.
  19. Charles_McG

    Virtual Book Club Thread: "Project Hail Mary" by Andy Weir (Spoilers)

    I don't think popping/eating the astrophage releases energy as photons. I think it's released as neutrinos - which the remaining astrophage would soak, and wouldn't affect the ship at all. The astrophage can manipulate their cell walls to act as a metamaterial that can be a perfect adsorber...
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