Cutout Keel
Comment
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Comment by Steve Knight on March 22, 2010 at 11:13pm
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Arguments for tandem keels from web site posted by Terri yesterday copied here for your convenience.
Advantages of a Tandem Keel
- reduced draft
- even though the draft is reduced you achieve the same range of stability as a deep keel (the center of gravity is kept low by putting weight from center of keel into bulb). Also slightly heavier than a standard keel
- same pointing ability as a deep keel. Each wing has a higher aspect ratio and are working more efficiently when compared to a single lower aspect ratio keel.
- better damping of pitch and roll
- smarter tacking
- better directional stability and resistance to broaching
- tank testing and actual use indicate improved performance and general “behavior” over shoal keel. Performance comparable to a deeper draft keel
- larger attachment plate reduces loads on hull during groundings
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Most interesting, Terri. I'll buy some of the theory, but not all of the execution as evidenced in the photo. Thanks for chasing that down.
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Comment by Terri on March 21, 2010 at 3:23pm
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Just found it... Bavaria's tandem keel... makes sense now that I've read about it.. http://www.ilikeit.net/HoopersYachts/index.cfm?IM=FrameSet&Page...
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yep, on the pimpin out of the keels. Getting mine painted in a tye dye motif with sequins & pearl swirls :-)
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Comment by ___/)ances With Sails on March 21, 2010 at 12:07pm
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yall pimpin out yer keels now so they look cool on th hard?
louvered keel? billet keel? imaginin an ineffecient eddy effect on th aft half from th fwd half.
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Someone on another sailing site said it may be a Bravaria
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Not a clue. Too much shrinkwrap, nobody around. Also saw a rudder with diamond shaped cutouts. Should have taken a pic of that too. Maybe to let some water thru so not too much drag? Clueless on why on a keel..would think you'd want that resistance. Don't know enough about.
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Very strange. Any info on what model boat?
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