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post #14 of Old 11-18-2009
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Originally Posted by zz4gta View Post
W/ a mainsail area of 257 sf (not that large for a 34' boat) you're seeing a load of 443 lbs on your sail in 20 knots. And you believe that the halyard doesn't see a great deal of that?
440 lbs was the figure I was using for Halyard load. 443 lbs in your calculation is the load on the Sail not on the Halyard. The halyard load will be considerably less due to:

1) Much of the load being side load
2) The load being divided between tack, clew, and head
3) Friction at the sail slides

Even if the halyard was taking the entire load, at 20 knots the main on a Bene 285 would take < 300 lbs according to the sail calculator.

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