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RogueIT wrote:
In my quest to better understand keels and what the differances are can someone post boats that are fitted with the following keels? Full Keel Westsail 32 Tayana 37 Whitby 42 Valiant 40 Bristol 35 example http://www.tgw.net/sailing/qca/jpegs...gdrawing_L.JPG http://www.macnaughtongroup.com/sovere2.gif Modified or cutaway "full keel" Nordica 30 Morgan Out Island series example (this one is a bit more cut away than others) http://www.libertysails.com/assets/images/sail_plan.JPG Fin Keel Almost every production (ie "brand name") boat Cal, Ranger, Columbia, Catalina, Pearson, Morgan, C&C, Hunter, etc etc http://www.catalina22.org/nsa/racing...s/image002.jpg This boat has the rudder taken off http://www.mudhead.org/images/Classifieds/side.jpg comparison http://www.tc.gc.ca/marinesafety/TP/.../Fig-1-1-2.gif http://www.marinewatch.info/keels.jpg http://www.marinewaypoints.com/learn...mages/keel.jpg Here is a boat specifically designed to gain some of the benefits of both fin & full keels http://www.macnaughtongroup.com/Anacortes%2032.htm Shoal Keel Could be anything, fin or full... just means that it doesn't stick as far down below the surface of the water. Bulb Keel Just like a fin keel, only with a big lump of heavy stuff at the bottom to improve stability. http://www.mallorca-bootcharter.de/media/v60/keel.jpg http://www.segelsport-hille.de/1/TRAILER%20J80%202.jpg Wing Keel One of those multi-purpose variations: the wing keel is just like a fin keel, only shoal draft with a wing like an airplanes at the bottom. This adds weight low down and also makes the keel more efficient with regard to lift/drag ratios (ie less leeway, higher speed). http://www.yachtsnet.co.uk/archives/...-wing-keel.jpg http://www.ospreysguide.com/ducky/im...rside-keel.jpg http://www.vacantisw.com/images/Articles/frontview.jpg Swing Keel Heavy ballast, pivoted with some means of pulling it up so as to sail in shallow water. http://www.northshore.co.uk/index.php?p=swing/swing http://www.romah.freeserve.co.uk/0im...el_profile.gif http://www.nanco.se/case_studies/bilder/idesign4.gif Drop Keel Similar to swing keel, only it slides up and down instead of pivoting. and something with a centerboard and a daggerboard. A centerboard is the same as a swing keel, except less intended to be ballast and used on smaller boats; also they usually pull completely inside the hull when 'up' whereas swing keels often don't. Daggerboards are just like drop keels only without the ballast (drop keels are sometimes called dagger keels); also daggerboards are used in much smaller boats like Sunfish & Lasers. Now here's a combination you don't see often ![]() http://www.mitchellyachts.co.uk/page3.htm One thing to bear in mind, this discussion of "the keel" and it's external form should not be confused with "the keel" as a structural member; keel & keelson are often used interchangeably in the structural context. Hope this helps, seems possible that I should have stuck with just some pics and not put in any words ![]() Fresh Breezes- Doug King |
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