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    Re: Lindbergh-Weems Second-Setting Watch
    From: Tony Oz
    Date: 2018 Sep 25, 04:00 -0700


    After some (lengthy) meditation at Ed's Lindbergh-Weems Second-Setting Watch drawing I came to some understanding for which I need confirmation.

    • the positive values of EoT correspond to the counter-clockwise turn of the besel, the negative values - to the clockwise turn. For example, an October's maximum EoT == +16m brings the "4°" mark up against the "twelve o'clock" position;
    • in both the Ed's and the original implementation the only movable part is besel - the outer scale with 0°-to-15° markings. This is done for simplicity only;
    • ideally all the scales should turn correspondingly - according to their respective hands (a hours', a minutes' and a seconds') gears ratios: one full revolution of the central scale for each minute notch of the besel, the 0°-to-180° scale should move by ~0°15' for the full travel of the besel;
    • the only scale that needs amendment is the 0°-to-180° one if I modify the face for my 24-hour watch. It should become 0°-to-360° with zero at "twelve o'clock".

    Please comment.



    60°N 30°E

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