Length of your slack/long/highline, either meters or feet
Total height of drop in middle of slackline with slacker, same units as above
Weight of slacker, either lbs or kg (both work)
For use with rope multiplier system
Estimated: 3" ball bearing=95%, 1.5" bushing=75%
I'D, GriGri, Eddy or whatever. Should be ~60-75% MPD=~95%
Should be 4-25%, unless using Spider Silk
Static force with non-moving slacker in middle of line (lbs or kg, whichever you used for slacker weight)
Stretch of slackline with slacker %
Stretch of slackline with slacker length
Efficiency of pulley system with brake
Highest possible mechanical advantage with system
Actual mechanical advantage with pulley system and brake loss
Minimum length of slackline required for final (stretched) length
Minimum amount of pulley length required to tension line to desired length
Minimum length of static rope required for desired tension/length
Force required to tension system (at brake)
Force required to tension system (multiplied 3:1 after brake)