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  1. Mario Lucchini's Avatar Super Moderator
    Name
    Mario
    Join Date
    Oct 2006
    Posts
    790
    In my continuum quest for avoiding monotony, I left the cars aside for a while, and dedicated these last weeks to finish a model balance scale I had started some years ago...

    I wasn't satisfied with its precision, trying different fulcrums, till I used some very tiny rolling ballbearings taken from a discarded PC fan...

    Now it has a rather disturbing sensitivity, with much improved precision...

    It's all polished brass throughout, the case being glass & wood.

    The weights were fine tuned using a high precision digital scale...


    Pics 1, 2 & 3 shows the scale with the case on....

    Pics 4 & 5 shows the left & right fine tuning screws...

    Picture 6 shows the indicator at dead center....

    Picture 7 shows the rear fulcrum roller bearing...

    Pics 8 & 9 shows the weights in their special drawer...

    Picture 10 shows the scale doing its thing, here, weighging its own weights!...

    Mario
    Attached Images Attached Images Model working analytical scale-p3310026-jpg  Model working analytical scale-p3310027-jpg  Model working analytical scale-p3310028-jpg  Model working analytical scale-p3310030-jpg  Model working analytical scale-p3310035-jpg  Model working analytical scale-p3310034-jpg  Model working analytical scale-p3310033-jpg  Model working analytical scale-p3310031-jpg  Model working analytical scale-p3310032-jpg  Model working analytical scale-p3310023-jpg 
    QUOTE QUOTE #1

  2. Nortley's Avatar VIP/Sponsor
    Name
    Buck
    Join Date
    Jan 2008
    Posts
    408
    Mario, to this once upon a time chem major, that balance is pure beauty. Just from curiosity, did you try agate for the knife edges (fulcra), as in many prototypes? Now you can balance those piston/rod assemblies before putting them in your Pocher engines, and your display case will be noticeably smoother.
    Scorpio - Builds models the way the prototype should have been built.
    QUOTE QUOTE #2

  3. hot ford coupe's Avatar VIP/Sponsor
    Name
    Jeffrey
    Join Date
    Sep 2005
    Posts
    7,833
    Wow, that's absolutely gorgeous. I was a chem major also and used something similar in my first years of chemistry. It really brings back a lot of memories.
    Sometimes a handful of patience is worth more than a truck load of brains. Have the courage to trust your own beliefs. Don't be swayed by those with louder voices. W.S. Maugham :)
    QUOTE QUOTE #3

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