| Re: long keels
Posted by Jock on 10/25/2009, 7:49:07, in reply to "Re: long keels"
Dave--Thanks for the suggestion, especially the Swallow & Amazon group. They have helpful links. As to why? --Centerboards are useful, even indispensable on shoal waters like the Chesapeake Bay where the interesting creeks and rivers average 3' deep. In racing one can pivot around a centerboard in tacking and raise it on downwind legs. But--I am a cruiser, not a racer. The centerboard box takes up all the middle of a small boat, radically reducing cargo/ sleeping area. The box is the weakest part of the hull subject to levered sheering forces in grounding (a metal centerboard will bend which is serious trouble) and impossible to maintain or paint the interior without dismantling it, so they are prone to rot and to leaks. Chappelle in History of American Sailing Ships, says centerboards were a 19th century invention first tried by the British Admiralty but "all these vessels gave trouble, becoming leaky around the case . . ." Centerboards nontheless become standard in American yacht design because racing took over as a design goal. Chapelle says the artifices of racing like measurement rules and triangular courses--no pilotboat or fisherman sailed to windward a third of the time on purpose--has skewed sailing vessel design, to the point that some are so unstable as to have "dangerous characteristics." He calls "an unhealthy type of yacht" the "shoal centerboarder." A long keel will track so you can balance the sails and even leave the helm to attend to something. Centerboards tend to create weather helm and what's worse, if the weight or sail plan shifts, lee helm which is dangerous; deadly if you fall overboard and the boat sails away from you. A long keel is slower to be sure, more difficult to bring through the wind, but far more stable. As a cruising sailor I would rather enjoy the trip and dependably get where I am going, than sit on the titling rail getting wet for the cheap thrill of speed. Well. You did ask. I won't bore you with the story of my youthful encounter with a centerboard which soured me on them forever.
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