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Old 04-04-2015, 17:27   #1
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NoTies's Avatar

Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
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Winch line pull (for the boffins)
My brain appears to have gone on Easter holiday. I am trying to calculate the line pull of a diesel powered winch. Engine torque is 41.2 pounds feet @2100rpm, reduction is 91.5-1 drum diameter is 7 inches, rope diameter 1/2 inch. The only formula I can find doesn't clearly specify units.
It's really first layer line pull I need as I'm just trying to break free a boat on the beach, once it's moving it's all downhill. Anyone help?
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