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I've finally decided to rig up a preventer for my boat. Whilst I'm pretty adept at sailing deep angles and not backwinding the main (and the accompanying SLAM!) the Admiral isn't, and I really would feel safer so I can sail DDW if need be.
My plan is to have a permanently rigged length of Amsteel from the end of the boom where the Mainsheet attaches led to about where the vang attaches. When needed I would unclip the forward end and attach to one of two NYLON lines (P/S) led fwd to a snatch block and then back to the cockpit.
The question is.... for a 280 sq. ft. mainsail what size Nylon line should I go w/ to get just the right amount of streeettttccchhhhh to cushion the blow w/o putting too much force on the line to permanently deform it, or worse break?
My initial gut feeling is 1/2". Supposedly 3.5% elongation at 10% of avg. strength of 7500 lbs.
My plan is to have a permanently rigged length of Amsteel from the end of the boom where the Mainsheet attaches led to about where the vang attaches. When needed I would unclip the forward end and attach to one of two NYLON lines (P/S) led fwd to a snatch block and then back to the cockpit.
The question is.... for a 280 sq. ft. mainsail what size Nylon line should I go w/ to get just the right amount of streeettttccchhhhh to cushion the blow w/o putting too much force on the line to permanently deform it, or worse break?
My initial gut feeling is 1/2". Supposedly 3.5% elongation at 10% of avg. strength of 7500 lbs.