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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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2 posters

    How to calculate potential energy in a compound system?

    Oppenheimer
    Oppenheimer
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    Fresh Blood Doesn't meanI'm new to crossbows


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    How to calculate potential energy in a compound system? Empty How to calculate potential energy in a compound system?

    Post by Oppenheimer Mon Feb 05, 2018 1:11 pm

    Dont´t know how to find out the elastic potential energy in a compound bow. The draw force curve isn´t linear so how to calculate? Remember seeing a picture recomending to measure the draw force every centimeter and putting in the numbers in a diagram to calculate the total volume. Anyone who can help me?

    When letting the string go back to the normal rest-position, the draw is less hard because heath- and internal friction losses. Shall I calculate when drawing the string or when I let it go back again (the true force/energy  applied to the arrow.)
    Alan Case
    Alan Case
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    How to calculate potential energy in a compound system? Empty Re: How to calculate potential energy in a compound system?

    Post by Alan Case Mon Feb 05, 2018 8:02 pm

    The easiest way to calculate this is to use a spreadsheet. The link below is from a traditional bowyers site, but it works the same for compounds as traditional bows.  I would use the measurements as the bow is let down.

    Force-Draw Curve Spreadsheet

    Alan

      Current date/time is Wed Nov 30, 2022 8:29 pm