Join Date: Mar 2006
Location: Cape Fear, NC, USA
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Balance of the sailplan ????
If sailing the boat is a small part of what you do with it then changing the sailplan won't matter much, but if the boats sailing ability is important to you then you will likely need to make other changes to maintain balance in the sailplan. Otherwise you might consider as was suggested in a previous post a sort of reef to temporarily raise the sail a bit as needed. You have not given any information of your vessel or rig and that makes commenting difficult.
Our schooner has gaff jaws on the booms and so they can be raised up as high as needed but many boats have goosenecks and of those some are on a slid and so can be adjusted up and down at least a bit. For us when we need the boom raised we take in the first reef and then use the throat and peak halyards to raise the whole sail assembly and so the boom as high as needed.
I think that the change in the vertical placement of the sails center of effort is not a great concern. More problematic is the change in the combined 'CE' of all sails. When headed down wind the reduction in sailarea in the aft most sail is not a big problem but when reaching (broad or close) the balance of the sail plan is changed in a way that may make the boat preform poorly. IF you have reef points then just tie in the first reef on the sail you are thinking about changing and try it. However, if the reef you have is much different from the change you are contemplating then maybe you should have a reef installed that duplicates the change you are contemplating and try it out. If it works for you then make all the other changes involved and 'life is good."