AVS - angle of vanishing stability - SailNet Community
 
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post #1 of 8 Old 06-19-2007 Thread Starter
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AVS - angle of vanishing stability

Hi.

The UK M.C.A Code for category 0 [blue water] requires that the range of positive stability extend to 123 degrees.

We would be interested to learn from blue water cruising folk what is considered an actual / acceptable AVS in practice, given that liveaboards tend to have a heavier displacement than the original design crieteria [which can reduce the range]

Many thanks!
M&M
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post #2 of 8 Old 06-19-2007
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Your question is perhaps misplaced. You should probably be asking a naval architect. I suspect that the only response that a blue water sailor would have upon achieving a 123 degree roll would be a heart-felt desire not to do it again. This is not exactly something you test during sea trials.(g)

“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.
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post #3 of 8 Old 06-19-2007
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The angle of Vanishing Stability is the angle sailaway bends forward to see his penis!!!
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post #4 of 8 Old 06-19-2007
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LOL.....I can't believe there is no comeback....
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post #5 of 8 Old 06-19-2007
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Are you going sailing or drowning ???

Difference between 123 and 110 and 135 is moot... get a ROUND hull - not flat and wide - and make sure that the total weight of everything that coulld possible come loose during a heavy storm is less than the weight of your keel.

That way, if you get knocked down, and all your particulars land on the headliner, the keel will still be enough to right you. Otherwise, doesn't matter what number the boat has, you're going to have issues...
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post #6 of 8 Old 06-20-2007
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I met a yacht captain who discovered the extremely high avs on a halberg rassy in the bay of biscay, and it saved her life when she was thrown back up on the boat by her tether after having been rolled under while at the helm. More is good!
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post #7 of 8 Old 06-20-2007
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Hey AFOC,
I'll have you know that I am hung like Einstein, with the brains of a horse. So there!!!

“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.
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post #8 of 8 Old 06-20-2007
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Angle of vanishing stability:
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