I had the same problem last year. Obviously tide and current can affect that, but one thing I discovered on my boat is the asymmetry of the genoa tracks. My genoa is very sensitive to car position/angle of genoa lead. We used to use the screw heads showing on the track to set the two cars and then measured and discovered that the screws were not in the same position on both tracks. I now have a stick-on ruler gauge fixed to the side of the tracks to get the same measured position on both sides. If the mast were not straight up and down, I would expect some sidedness to performance as well. The slot will be more open on one side than the other, but not sure how off it would have to be to notice it. That is why I went to the hanging gauge to more accurately measure center position. Dave
S/V Aries 1990 C&C 34+ New London, CT > On Aug 20, 2019, at 9:53 AM, Shawn Wright via CnC-List > <cnc-list@cnc-list.com> wrote: > > What are the symptoms of an uncentered mast? I have noticed that I regularly > see slower speeds on one tack (I need to pay more attention to confirm which > tack) even after trying to tune the sails well, and under regular > wind/current conditions. I don't have a knot meter, and only use Navionics > for GPS speed, but it has happened often enough that it makes me wonder... > -- > Shawn Wright > shawngwri...@gmail.com <mailto:shawngwri...@gmail.com> > S/V Callisto, 1974 C&C 35 > https://www.facebook.com/SVCallisto <https://www.facebook.com/SVCallisto> > > > On Fri, Aug 9, 2019 at 4:33 AM David Knecht via CnC-List > <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote: > I recently did some more mast tuning with my new/old Loos gauge and have one > addition to all the guides I read that I think worked very well. The > question is how to tell when the mast tip is centered side to side. In most > guides you use the main halyard and measure the point where it touches some > reference point on either side. I found this difficult to reproduce on the > two sides. At the suggestion of a local sailor at my club, I got an > inexpensive hanging scale > (https://www.amazon.com/gp/product/B00ZWNGZFO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 > > <https://www.amazon.com/gp/product/B00ZWNGZFO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1>) > and looped the hook through my halyard shackle and used that to determine > when the mast was centered. I would pull it down until it touched the > chainplate and note the weight and then repeat to the same point on the othe > side. It worked very well (and I was off a bit). Dave > > S/V Aries > 1990 C&C 34+ > New London, CT > > <pastedGraphic.tiff> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > <https://www.paypal.me/stumurray> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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