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  1. IRstuff

    Welding on top of rail, to avoid noise in curves

    I had no problem downloading the the paper; it downloaded into my download manager just from clicking the link, but it is from 1984. File is attached herein. They seem to indicate that the radius of curvature seems to be the critical parameter.
  2. IRstuff

    Azerbaijan Airlines flight carrying 67 people crashes in Kazakhstan

    None of the holes have been shown to penetrate both sides of the tail elements, suggesting they were caused by low velocity projectiles, like rocks kicked up from the crash landing. The holes show a directionality pattern, consistent with ground debris kicked up and impacting the plane during...
  3. IRstuff

    Azerbaijan Airlines flight carrying 67 people crashes in Kazakhstan

    https://www.cbsnews.com/news/plane-crash-kazakhstan-dozens-dead-but-survivors/ About half onboard survived the crash, currently believed to be caused by a bird strike
  4. IRstuff

    Aluminum electrolytic capacitors

    Please stop; changing your username is not going to change the answers you've gotten in the past. As discussed before, the electrolytics dry out; energizing them does not stop that.
  5. IRstuff

    Electrical Components for Water Heating Experiment

    The immersion heaters like immersion heater on Amazon have the heater element inside the stainless tube. It would be crazy and dangerous to have a 120V-connected heater element directly immersed in water. Frankly, you seem to be hung up on a specific implementation that doesn't have to be that...
  6. IRstuff

    Post editing window too short

    The issue is that I often don't do anything until I go back to the thread later; like today, barely 4 hr later and realized that I responded with an empty post and there's no way to delete it. I think the window to delete or edit should be 24 hr.
  7. IRstuff

    Use of AI for learning and practicing structural design

    That's my understanding; I think there are great risks in allowing unsupervised, uncontrolled, training by the general public, since that's obviously rife with possibilities of contamination and suborning of the AI. I can well imagine that if the AI could be trained through public interactions...
  8. IRstuff

    Things you love/hate with mathcad

    Units - that's a must -- needs to seamlessly convert SI to USC and vice-versa; the mixed units comment above, I think, only applies to erroneous mixed units. Adding 1 ft to 1 m is perfectly fine in Mathcad; adding 1 ft^2 to 1 m will result in Mathcad griping about incompatible units. Given-Find...
  9. IRstuff

    DIY radiant heat system

    There are tankless water heaters that can be used for heating; they have a separate loop and separate pump that is controlled by the thermostat. However, the demand is substantially higher than that of hot water usage; imagine, say, a 15-minute hot shower every half hour, every night. That...
  10. IRstuff

    Evaporation from Tank (Theory Question)

    The root cause is your temperature not being 0 kelvins and not being a closed system. Fick's Law describes diffusion as driven by concentration gradients; in this case, there is always a concentration maximum at the surface of the liquid because the thermally driven evaporation to achieve the...
  11. IRstuff

    Use of AI for learning and practicing structural design

    That is precisely what an LLM is supposed to do; it takes your input and tries to predit what is the most likely answer, based on what it's "learned", but not necessarily the most correct one. As such, there's no guarantee that it's either correct or isn't a hallucination. Few LLMs have actual...
  12. IRstuff

    Things you love/hate with mathcad

    Maple Flow looks interesting, but it seems to be more of an iteration of the symbolic Maple engine. One of the things I use Mathcad for is table driven calculations that would otherwise require something like Matlab, but I don't do programming.
  13. IRstuff

    Things you love/hate with mathcad

    Integration was tried in earlier versions of Mathcad, but trying to keep up with Microsoft, or any other company's software/software changes is a continual game of catch-up, and rife with pitfalls. Sketching was tried in Mathcad with SmartSketch, which worked until it didn't. I think trying to...
  14. IRstuff

    Windrunner

    That would be a crazy expensive way to make the argument though.
  15. IRstuff

    Winter tires that don't work in snow

    According to the list of affected tires, they are all R/T (rugged terrain) or M/T (mud terrain) designated, which means they were never intended to be snow tires. https://static.nhtsa.gov/odi/rcl/2024/RCAK-24T014-2169.pdf
  16. IRstuff

    Windrunner

    That's half the problem; they still have to get the blades from the factory to an airport. Otherwise, they'd have to build both a factory and an airport together.
  17. IRstuff

    Winter tires that don't work in snow

    Ostensibly, there is supposedly a difference between all-weather/season tires and winter tires, namely the tire rubber performance/traction in freezing temperatures.
  18. IRstuff

    Windrunner

    Seems a bit optimistic; 100-m lengths still pose a problem getting to the airport and then getting from the destination airport to wherever the wind farm is.
  19. IRstuff

    overshoot nonlinearity

    Your scope photo shows unsymmetrical slew rates for rising and falling edges; specifically, the falling edge is slew-rate limited, i.e., something in your driver is limiting the fall rate so severely, that it's not enough to generate an overshoot.
  20. IRstuff

    Why Do Some People Believe They Have the Right to Dominate and Suppress Others ?

    If I go here https://www.eng-tips.com/group/engineering-language-grammar-skills.1/info there's a button for leaving the group. I presume that there's a button for joining the groupd if you are not already a member

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