Join Date: Jul 2015
Location: Northshore of Huron
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Tuning a rig with a split backstay. Loaded or unloaded?
So I'm retuning the rig on my Mirage 33 after working on it the other day. I am happy to report that there are 3 different sized wire on it (split backstay, baby stay, and shrouds) and my Loos gauge has EXACTLY those 3 sizes on it's scale. Lucky!
So my issue is with the backstay. It's a split stay system, with a block and tackle that slides down the two wires to tension them. I was cranking down both aft turnbuckles evenly to hit my 15% on the Loos when I realized I will not have enough turnbuckle to crank it to the (iirc) 28 on the gauge, I got maybe 23~. Then I thought to myself, well this is an adjustable backstay, MAYBE it's not supposed to "start" at the 15%. I did tighten up the adjuster a bit and indeed climbed the gauge up closer to the 28, but then stopped and left it because I felt like I didn't know what I was doing and didn't want to break something.
I set my baby stay to 15%, along with my shrouds, everything looks centered up, and I can see the rake in my mast aft, which I believe is normal for this boat. My last boat ran a dead straight spar, no adjusting, no rake, so this is all new to me.
So... when setting the Loos on the split backstay, do you get it close to tension then sinch it the rest of the way with the adjuster? In my case that still leaves alot of room for that adjuster to crank down.
Bonus question: I noticed under some 20kt~ gusts yesterday my rig pumped a little bit, just enough for me to notice. No sails flying, just sitting at the dock taking the wind hard on the beam. This is the first I've noticed this, and don't know if it's a sign the rig isn't happy, or if I'm just used to small boats with stiff masts.
*The PO did replace the forestay 2 yrs ago, and there is a chance he doesn't have it tight enough, which may explain the lack of adjustment in the aft turnbuckles, but I don't know for sure. That's my next investigation...
Some youtube videos, nothing fancy
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