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post #3 of Old 02-22-2012
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Originally Posted by sidewinder585 View Post
I just picked up an old coronado 30' for a parts boat. There is some kind of trim tab on the trailing edge of the fin keel. It is moved by a lever in the cockpit from port to starboard depending on which tack you are on. I will probably never sail this boat so i have 2 questions. First, i am assuming that the fin gives you extra "lift" to windward? How much does it actually help? Second, does anybody know of a coronado owners group so i can see if anybody wants anh of the mechanism? I can imagine it would be hard for someone restoring one to find these parts and i wouldnt want to scrap them. Thanks -John
Back in the late 60's, early 70's, there was a lot of work done on trim tabs. They fell into disfavour because they added a lot more complexity and uncertainty than benefits. If you were "America's Cup" expert they could give a slight advantage but otherwise they were simply more trouble than they were worth. The IOR essentially outlawed them.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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