[Public-list] Center of Buoyancy

[Patricia O. Meinhold]

Robert Kirk wrote:

> Mike & Roger... Jack Horner, surveyor & former A30 owner gave a winter 
> seminar a few years ago where he passed out a set of linbes, stability 
> calculations, & polar plot  for the A30. I don't know where he got 
> them, but he's also a marine archetect  so I guess he made them 
> himself. (I can fax you a set of the handouts if you'd like. Anyway, 
> he shows the Lateral Center of Buoyancy 16.1 feet aft of the bow.
>
> For info, he also calculates:
>
> Max GZ          1.352 ft @ 60 degrees
> Prismatic Coeff 395/384
> SA/Disp         15.2/15.4
> Beam/length     .29
> Ballast/disp    .37/.38
> Comfort ratio   .32/.31
> Pounds/in immer 676
> Moment to trim 1deg 775lbs
> Righting Mom @1deg 405 lbs
> Wetted Sfc area 204 Sq ft
>
> Hope those numbers mean something to you.
>
> Bob Kirk
> Isobar #181
>
>
> At 03:22 PM 2/28/05 -0500, Meinhold, Michael J wrote:
>
>> Has anyone seen a real lines plan or any digital format of the hull 
>> form? J
>> or I could derive the CB and other properties from it.
>
>
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>
That's part of what we need -

if you move 100 lbs forward 10 feet, that's 1000 ft-lbs of moment by the 
bow,
1000 ft-lb /( 775 ft-lb/degree) = 1.3 degree trim by the bow.




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