[Public-list] Chainplate knees and mast pad

[George Dinwiddie]

Thickening the hull, even on the inside, is not going to add much 
strength or rigidity.

If you have gaps between the knees and the hull, filling that gap will 
help a lot, whether you do so above the existing knees or glass in new ones.

I would *not* move the chainplates and mast plate forward.  Carl Alberg 
designed the boat for a 7/8ths rig, but Whitby decided to build a 
masthead rig.  Carl adjusted things as best he could, under the 
circumstances.  Unless you are a good naval architect, or hire a good 
naval architect, and recalculate the entire design, I wouldn't mess with 
it.  The boat works quite well as is, and changing the geometry is more 
likely to cause problems than to fix them.

  - George

Peter Amos wrote:
> I didnt explain myself very clearly.The extra layers of mat would be
> on the inside of the hull,also the plywood and chainplates. Only the
> bolt heads and washers would appear on the outside of the hull. I
> have no criticism of the engineering design of the original knees but
> the quality of their construction leaves a lot to be desired.All of
> them on Tait Tait have gaps between the top of the knee and the deck
> and a poor finish to to the glasswork.George makes a good point about
> the bulkhead,I overlooked that ,but I could reinforce the hull either
> side of it and strengthen the tabbing.The other options suggested are
> also worth considering.I may remove the old knees and make new
> sturdier ones set so that the chainplates are moved forward an
> inch.This would let me move the mast plate forward an inch so that
> ithe mast sits more squarely on the beam.Any opinions on that idea? 
> Peter Amos Tait Tait #478 
-- 
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   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.
                                             'The Middle' by Ogden Nash
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