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Momentum V123.............

Discussion in 'General Elio Discussion' started by wizard of ahs, Sep 13, 2017.

  1. Donnyboy

    Donnyboy Elio Addict

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    Thanks for posting the Wednesday and Friday blogs. For some reason I stopped receiving emails from Elio. I even added my name to the list again but still am not receiving them.
     
  2. wizard of ahs

    wizard of ahs Elio Addict

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    Nope, only available on Amazon Prime :p
     
  3. Johnny Acree

    Johnny Acree Elio Addict

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    This 222N number. Kind of an odd number. (Yes I know it's an even number) How did the powers in charge come up with that number? Is that the force necessary to raise a pump knot, but not enough to crack your skull, or cause a concussion?
     
  4. floydv

    floydv Elio Addict

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    222N seems to be a Golden Number of sorts serving as a standard of force for testing compliance with certain safety/collision standards. See, e.g.,

    https://www.law.cornell.edu/cfr/text/49/571.208
    https://www.law.cornell.edu/cfr/text/49/571.222

    and it's even a standard for calibrating instruments used to determine bite force:
    https://www.ncbi.nlm.nih.gov/pubmed/12473999
     
  5. Rob Croson

    Rob Croson Elio Addict

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    It's the metric conversion of the nice and round 50 pounds force. Someone SWAGged 50 lbf for a test 30 years ago, published the result, and it became the de facto standard. Then it got converted to metric. Now you have a number that seemingly has no particular meaning, and no easy way to figure out why it got chosen.

    A lot of specs end up being derived that way. Someone made up a nice, round number, and then it got converted somewhere along the line to a different unit, and ends up being some strange number. You see it all the time in engineering documents that have been around for a long time, transferred between companies, or had to be adapted to different regulations/specs. Often times values are chosen during development when there is little burden to prove that the number means anything. After the value is released to production, you have to move heaven and earth to prove that the change is needed and/or safe, so it never gets changed. You just keep on keepin' on.
     
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