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Old 09-01-2011, 11:54   #1
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What Boat Would Right Herself Fastest ?

What boat/hull style would right herself fastest after a knockdown?

Probably a deep keeled narrow beamed hull?
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Old 09-01-2011, 11:57   #2
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Hope I never find out...lol
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Old 09-01-2011, 12:09   #3
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I only know mine would be one of the slowest.
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Old 09-01-2011, 12:19   #4
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But on a serious note I guess it depends on many factors... how much sail up.. does the mast hold firm or snap... sea conditions.... its not a 'Cat'..
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Old 09-01-2011, 12:22   #5
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Quote:
What boat/hull style would right herself fastest after a knockdown?

Probably a deep keeled narrow beamed hull?
I think the Fastnet analysis also suggested that a flush deck boat has less righting ability than one with a cabin top. It helps to have buoyancy well below the water line (when inverted).
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Old 09-01-2011, 13:17   #6
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Stabilty curves from Desirable and Undesirable Characteristics of Offshore Yachts shows that a general hull form designed to the International Rule (rule that produces 12 meters) or the Universal Rule (which produced the New York 40 class) have no part of the curve in the negative part of the graph, IOW these boats have no stability upside down.

Marchaj compares the Contessa 32 against Grimalkin, an IOR 1/2 tonner that were both in the 79 Fastnet in his book Seaworthiness the Forgotten Factor. Note that the Contessa has positive stability up to 160 degrees over.

Stability curves for Contessa 32 and IOR 1/2 tonner:
Contessa 32 NE PLUS ULTRA

Left for Dead is a book by the guy who survived being on Grimalkin in the 79 Fastnet race.

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Old 09-01-2011, 14:55   #7
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Originally Posted by cfarrar View Post
I think the Fastnet analysis also suggested that a flush deck boat has less righting ability than one with a cabin top. It helps to have buoyancy well below the water line (when inverted).
That's very interesting and opposite of what I have always assumed.

Thanks
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