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hellbent
Mar 14, 2006, 7:45 AM
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Registered: Nov 6, 2002
Posts: 132
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Does anyone have a derivation of the equations for calculating the force on a line? I do know there is a force calculator on a few websites. But I would like to play around with the equations.
I am looking for both theoritical and practical real-world variables to be factored in.
- thank you.
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slacklinejoe
Mar 16, 2006, 4:48 AM
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Registered: Nov 5, 2003
Posts: 1423
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Eric Matthes has a bit of work on it online at: Technical Analysis of Slacklines
I used his work for my online force calculator for slacklines which you may have already seen at: Force Calc
There is a lot of the equation that we simply do not have figured out for real world analysis. We can calculate what happens when you are standing still fairly accurately (that's just working with trig and static loads), but dynamic movements run into a brick wall since webbing has a very variable elasticity through it's life and across varous brands, colors and humidity. Refer to the links at the bottom of the page for more on that our prior discussions.
An inline dynometer is all that is needed for exact determination of what is actually going on, downside is they aren't super cheap but many good physics labs (or industrial rigging places) will have them on hand.
There are a few other threads that we've tried to projecture what all needs to be calculated to get an idea for dynamic moves and such.
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