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  1. M

    Energy cost of air displacement?

    The force needed to move your car through the air is given by the drag equation. Work is force x distance.
  2. M

    Ref615

    The date suggests that it's lost it's little mind. Is there a "factory reset" procedure in the manual?
  3. M

    Winter tires that don't work in snow

    Relevant editorial. https://www.barrietoday.com/local-news/column-its-time-for-ontario-to-mandate-winter-tires-10032176
  4. M

    Vibration excitation with electromagnet

    Try something like this. No idea 1000 Hz would do. https://www.magnetoolinc.com/products/electromagnets/low-profile-electromagnets/
  5. M

    Hydrogen from hydropower

    Greg's link is two years old. Construction started recently. https://www.northcountrypublicradio.org/news/story/50601/20241003/construction-starting-on-hydrogen-plant-in-massena
  6. M

    Hydrogen from hydropower

    It doesn't need to be profitable because there's a "vision". Actually two visions that can gaze into each other's eyes and proclaim mutual adoration. It's an economically depressed area of NY state so Air Products can count on "receipt of certain local and state incentives, as well as any...
  7. M

    Vibration excitation with electromagnet

    Isn't this just a very inefficient speaker?
  8. M

    PW1500G engine failure A220 swiss

    One of the hospitalized crew has died. https://apnews.com/article/switzerland-swiss-attendant-dies-smoke-9194579e413bd736c7020449f2afeee7
  9. M

    Carbon Removal Degree Path

    Regardless of what the future environment looks like, there will be one, and civil engineering projects will need to interact with it. The civil and environmental program seems like it opens the door that you're interested in now without locking you behind it.
  10. M

    Problem with device (sound to electrical energy)

    Just for scale: A single piezo element produces voltage of a few milli-Volts and power of a few milli-Watts. If we assume 5 mV, then you'd need a thousand elements in series to get a 5 Volt input to the rectifier. Those thousand elements might generate a Watt. So, 10 strings of a thousand...
  11. M

    Problem with device (sound to electrical energy)

    I'd say your problem starts with unrealistic expectations.
  12. M

    Horizontal Crack Around Basement (Not Frost Heave)

    Maybe it was originally a rubble foundation, replaced with block sometime after the house was built.
  13. M

    Forged 6"thick 4340 steel bars

    Well, if your customer is paying you to make chips....
  14. M

    Breaking apart a Cots part

    That sounds like exactly the right way to do it.
  15. M

    Surface Plating

    Sharp corners.
  16. M

    ASSYMETRIC FLAP

    Symmetry<>same.
  17. M

    Lift mechanism for plastic tray on CDLR Conveyor

    Simple bell crank mechanism driven by a single actuator, preferably electrical.
  18. M

    Forged 6"thick 4340 steel bars

    That does seem wasteful. Is your company the designer, or just a machining contractor?
  19. M

    Forged 6"thick 4340 steel bars

    Forging improves a bunch of material properties. They may or may not be important to the parts you describe. From Gemini

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