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  1. GregLocock

    Kinematics - force analysis

    One way would be to use a work equation to find the forces, once you've sorted out the geometrical relationship between the x and y locations as a function of theta.
  2. GregLocock

    Design of Built-up section.

    You've got 2 equations and 2 unknowns, assuming thickness is constant and the other dimensions are in multiples of t. Presumably you know how to calculate Iyy and Izz? parallel axis theorem and all that.
  3. GregLocock

    Python method to find maximum I-beam

    You'd need a lot more constraints to get a satisfactory answer. A simple optimiser will always maximise the height of the web and the width of the flanges, but the resulting I beam will be misproportioned and will fail in unusual ways.
  4. GregLocock

    What is "Free length" of springs in safety relief vavles??

    Cynical spring designer says scrag (fully compress for several cycles) the springs at the supplier before they go in the box. Finding out how many cycles is necessary before length at n+3 cycles is only 0.5% would take a happy morning in the lab. Worst case scenario is that you may have to...
  5. GregLocock

    Planetary Gears - Independent Rotation

    Sturmey Archer 3 or 4 speed bicycle hub, any number of automatic gearboxes. From wiki
  6. GregLocock

    LandRover Death wobble

    "I'm not aware of decent independent suspension designs getting into positive-feedback steering situations" BMW X5 gen 1 could get into a self excited steering oscillation when going round a corner. So the path of the vehicle resembled a superposed circle and sine wave. It had another error...
  7. GregLocock

    How to create new FAQ

    Hit the FAQS heading in the navigation bar and start typing.
  8. GregLocock

    Clouds and models

    Sometimes I might feel a bit sorry for the climate modellers. This paper shows that clouds help heat the world https://pmc.ncbi.nlm.nih.gov/articles/PMC8325336/ This paper shows that absence of clouds help heat the world https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL114882 The...
  9. GregLocock

    AI generated list of negative feedbacks in the real world

    None of these are accounted for in the models h/t Willie Eschenbach who painstakingly walked an AI through the options. This list may not be accurate but does at least need to be evaluated if modellers are pursuing Gold Standard Science. I've only included the names, the entire article is too...
  10. GregLocock

    JetZero Blended wing proposal

    From Aviation leak https://aviationweek.com/aerospace/aircraft-propulsion/jetzero-takes-wraps-blended-wing-body-development-plans A little more than two years after JetZero revealed ambitious plans to challenge the Airbus-Boeing air transport duopoly by developing a blended wing body (BWB)...
  11. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    There's a backup power supply in the ECM so even if the 12V battery gets disconnected the capacitor has enough oomph to get the job done.
  12. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    "To what extent do you address combination failures?"In automotive we don't. SPOF only as a general rule. There may be exceptions.
  13. GregLocock

    Spain and Portugal power grid collapse | Report Released

    In other news the rent seekers don't want to pay for synchronous condensers.
  14. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    "Interesting an electric door release without a mechanical scheme is able to pass a reasonable functionality/hazard mitigation review for use in a passenger vehicle." Yeah, having lived through the rollout of systems engineering and SPC in a car company I can see that FMEAs are not the Tesla...
  15. GregLocock

    Spain and Portugal power grid collapse | Report Released

    machine translation of the report with all sorts of things blacked out https://www.linkedin.com/posts/lionhirth_spanish-government-blackout-report-machine-translated-ugcPost-7340988014904389635-jQHq/ If you go into full screen you can download it.
  16. GregLocock

    Turning houses into boats...???

    I asked chatgpt "Please find references for the following statements:the seismic plate that forms the USA is tipping, and local actions such as dredging, building cities, and groundwater extraction all affect local sea levels vastly more than the thermal expansion of seawater and melting ice...
  17. GregLocock

    Spain and Portugal power grid collapse | Report Released

    Fingers being pointed all over the place from what I've read. Hopefully someone who actually understands the issue is responsible for fixing it, but (a) this Spain and (b) the government is involved and (c) it is affected by the quasi religious beliefs of the elite. I wonder where the real...
  18. GregLocock

    Adams Matlab cosimulation instability

    have you looked at the .msg file? try debug/eprint as well (it's somewhere in the settings menu)
  19. GregLocock

    LandRover Death wobble

    @cibachrome thanks. When new the live front axle LandRovers were safe to drive at any feasible speed, so we know it is a wear thing, perhaps excited by poor geometry
  20. GregLocock

    Turning houses into boats...???

    @XR250 yes of course I have references.I suggest google will help you once you have well formed questions.

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