Slackline Load Calculator
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Please edit the blue cells only!
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Seriously, you will break the calculator if you mess with any of the other cells!
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Length100<--Length of your slack/long/highline, either meters or feet
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Sag5<--Total height of drop in middle of slackline with slacker, same units as above
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Slacker Weight170<--Weight of slacker, either lbs or kg (both work)
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Number of Pulley Sheaves2<--For use with rope pulley system
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Estimated Pulley Efficiency75%<--Estimated: 3" ball bearing=95%, 1.5" bushing=75%
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Estimated Brake Efficiency60%<--I'D, GriGri, Eddy or whatever. Should be ~60-75% MPD=~95%
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Line Stretch at Tension15%<--Should be 4-25%, unless using Spider Silk
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Line Tension854.24<--Static force with non-moving slacker in middle of line (lbs or kg, whichever you used for slacker weight)
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Line Stretch with Slacker (%)0.998%<--Stretch of slackline with slacker %
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Line Stretch with Slacker (Length)50.00<--Stretch of slackline with slacker length
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Mechanical Advantage Efficiency45%<--Efficiency of pulley system with brake
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Theoretical MA3<--Highest possible mechanical advantage with system
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Efficiency Loss MA1.35<--Actual mechanical advantage with pulley system and brake loss
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Line Length (un-stretched)85<--Minimum length of slackline required for final (stretched) length
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Minimum Pulley Throw (length)15.00<--Minimum amount of pulley length required to tension line to desired length
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Minimum Pulley Rope Length45<--Minimum length of static rope required for desired tension/length
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5050.24937811
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Pull Force Simple MA633<--Force required to tension system (at brake)
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Pull Force Multiplied MA312<--Force required to tension system (multiplied 3:1 after brake)
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