sailboatmike wrote:Every boat sails differently, I read a heap of books and watch videos BUT nothing compares to actually being out on the water and doing it, trying things while watching you speed to see if you drop a bit or pick up a bit
I agree with Mike, and sympathize with Dave because I feel the same way.
I learned to sail by buying a Siren 17 out of a farmer's field, buying "Sailing for Dummies" and reading to about chapter 8. Then I went sailing. I kept that boat for a couple of years and when I felt that I could handle a bigger boat we bought the Mac. I am by no means a good sailor, and I don't really have the time or energy to make it a lifestyle or a big study project. Everything is simple on my boat: original sails with the jib on a roller furler, and the sail controls are only the mainsheet, jibsheet and furler line. To make matters worse, the batten pockets in my mainsail are a bit loose and I only have one batten in the sail. I have a boom vang, but haven't used it yet. So my rig looks really amateur, and I don't care, I just have a blast sailing around. The boat can tack through 110 degrees going upwind into a river current, and has a strong weather-helm in the gusts. One day I'll upgrade the sails, and figure out the boom vang, and adjust my rig for the right amount of weather helm, but later, not now. Oh, and I have the original Genoa in a bag, never used, and it will probably stay there because tacking a jib is easier.
I follow Mike's advice about just going out and trying things. It's a bit challenging in my area where we have extremely variable currents throughout the "lake" where I sail, which is really a very wide portion of the St. Lawrence River where it meets the Ottawa River. That makes for huge changes in the current, exacerbated by multiple islands and bays causing the current to swirl downriver. The current can vary from 2kn downstream to 1/2kn upstream, invisibly, in the space of a few feet. The winds are not regular at all, but very gusty and variable. Add short, steep river-waves to that mix, and it makes it really hard to figure out whether that change in speed came from a sail tweak or a change in one of the other variables. I can't go two minutes without something changing in the wind or water, and I never really have a chance to set the sails in constant conditions, and then relate my tweaks to performance changes.
I took a friend of mine out on Sunday for about 6 hours, probably the longest time I've ever been under sail, and we did a lot of experimentation. We had a total blast, and learned some stuff. According to Environment Canada the wind was 10kn, gusting 20kn, and subjectively it seemed correct. Waves were 1 to 2 ft, and very closely spaced, wind and current more or less directly aligned out of the West. Full main and full jib.
Sailing upwind into the wind and current on 10 minute tacks, we could only fight about 300 ft upstream per tack. We lost a lot of ground at the point of tacking because of those darn waves, and the light bow. We lost so much speed going around through the wind that we were often dead in the water after completing the tack, and had to regain headway but not before being blown and carried far downstream. We tried several different ways of tacking, from rapid rudder motion, to gradual rudder motion, to progressive rudder motion, and weren't really satisfied with any of them. We were trying not to use the rudder as a sea brake during the tack, but with that wind and those waves we really had to be agressive at times, or the bow we would run out of momentum before the bow came around. The best speed (GPS over ground) we could get close-hauled into the wind and current was about 3.6 kn. Cracked off just a bit and we were consistently in the 5's, with a couple of spurts to 5.9 kn. I thought that was pretty good since we were going up-current, and the water-speed must have been in the low 6's. My buddy was helming, and we were talking about other stuff too, so we were tacking through 150 degrees, over ground. Still not too bad, given the conditions. Weather helm was a big issue, with the gusts causing the boat to round up even with full opposite rudder. We started letting the mainsheet out when the boat started to round up, and if that was done fast enough then the roundup would stop and we could continue on. I think a reefed main would have helped with the weather helm, but I don't have reefing lines installed. I also thought about bringing the centerboard up just a touch to reduce weather helm, but didn't get a chance to try that. It's impossible to move the centerboard if it's even slightly loaded, which is basically all the time when sailing as far as I can tell. We were able to keep up with several other boats in terms of speed perpendicular to the current, but they were able to move upriver slightly better. We might have done better with me on the helm, but then again, we might not have.
Coming back downwind was interesting. We maintained over 4 kn with just the jib out. Centerboard up and only the leeward rudder down. When we jibed over with only one rudder down, we simply couldn't control the boat, and it came about to a reach even with full opposite rudder. The leeward rudder has to be down. Lesson learned. We were fast downwind, compared to other boats, and we easily kept up with another boat who had both the main and jib winged out. I find wing-on-wing sailing too hard to do for any length of time with our variable winds. I think the Mac has too narrow of an angle between collapsing the jib and an accidental jibe, when compared to other boats. Also, we learned that we couldn't roll up the jib with the furler while heading downwind, we had to bring her about to loosen the pressure on the sail.