• John A Critzman@lemmy.world
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    4 days ago

    Moves C index to 2 on the D scale

    Moves indicating line to 2 on the C scale

    Reads 4 on the D scale

    Good thing 2+2 and 2*2 yield the same answer. Would have to bust out the addiator otherwise

      • Zerush@lemmy.ml
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        4 days ago

        Yoy can use 2 normal rules to add/rest 2 numbers, but you can’t do it in a slide rule with its logarithm scales. But luckily there are solutions out there

    • Zerush@lemmy.ml
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      4 days ago

      Well, but fails with 3+3, there an US engineer must use still an addiator. Nowadays it’s easier with an pocket calculator.

        • Zerush@lemmy.ml
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          22 hours ago

          Well, even an iPhone has an calculator by default (maybe with an monthly fe)

          • John A Critzman@lemmy.world
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            8 hours ago

            But when I’m at the club with my friends and I pull out the Pickett model N600-ES speed rule to calculate the tip, all the eyes are on me

            • Zerush@lemmy.ml
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              8 hours ago

              In my studies I used a doble side rule, the Faber-Castell 2/83 N Novo-Duplex, 31 scales, not so practical for the pocket (>38cm)