ODay 35 rig tension

[damauney]

BrionAnother rig tension question for you. Last year I set the rig tension with a Loos Gage and the values in your Video. Video was very helpful by the way,as all your videos are. When I look in the ODay 35 manual it says to tighten all rigging only one or two turns beyond hand tight and caution not to overtighten. They indicate that they oversized the rigging beyond the necessary sizes. The lowers are attached via rod to the structural floor pan. The uppers are attached via a chain plate to the main bulkhead. I am concerned with these cautions that using the percent of breaking strength values in the video my be too tight. I still get some slack in the leeward lowers as the manual says I will. Any feedback would be helpful.ThanksGood WindsDave Ms/v DAMWEGAS

 

[Brion Toss]

The manual isn't always right

Hello,There's an element of truth here; oversized rigging shouldn't be made as tight as proper sized, as the target load in pounds will be reached at a lower percentage of the larger wires' break strength. But you will note that the gauge should have the pounds of load that a given percentage will produce, so you could determine the right size wire, and tune to the pounds it should have. Hmm, sounds complex, doesn't it? And that's not the worst of it, because even if you could duplicate actual loads, the leeward shrouds would still be too slack, as the tune wouldn't produce the elastic tension that prevents leeward slack.Have you run stability numbers on this boat? These should tell you whether or not the wires are actually "oversized." Oddly enough, I got my first consulting job with O'Day, when they got sued by someone who was blinded when a wire broke on a boat that was tuned way too slack. Fatigue. But in any event, tuning instructions like "one or two turns beyond hand tight" just burn me up. Run those numbers, and get back to me.Fair leads,Brion Toss