[Public-list] Chainplate knees and mast pad

[Mike Lehman]

I agree with George. Moving the chain plates and mast forward could cause
excessive lee helm. I would not mess with the rig either.

Mike Lehman
><((((º>¸.·´¯`·...¸><((((º>



----- Original Message ----- 
From: "George Dinwiddie" <gdinwiddie at alberg30.org>
To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
Sent: Friday, July 30, 2004 12:14 AM
Subject: Re: [Public-list] Chainplate knees and mast pad


> 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
> -- 
>   ----------------------------------------------------------------------
>    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
>   ----------------------------------------------------------------------
>
>
>
> _______________________________________________
> Public-list mailing list
> Public-list at alberg30.org
> http://alberg30.org/mailman/listinfo/public-list
> 

 1091193558.0