[Rhodes22-list] Centerboard engineering question

[John Shulick]

Hi,

  The older centerboards are a lead/fiberglas resin mix as far as I know.
The trunk itself is a concrete core in a fiberglas shell. If water
penetrates either they will swell, the centerboard from Fiberglas
deterioration and the trunk from concrete expansion. Your approach to repair
the centerboard should work but when finished you should consider sealing
the board with Interlux e2000 barrier coat or some equivalent epoxy sealant.
The repair of the centerboard trunk is more extensive and for that I will
refer you to a file made by one R. Philaja a former list member and Lou (the
miracle worker) Rosenberg a still current member whose article explains it
far better than I can.

http://old.nabble.com/file/p31634376/r22boardtrunk.pdf r22boardtrunk.pdf 

Good luck hope you're sailing soon

John S




atmcneil wrote:
> 
> I have a 1981 Rhodes and I've had continuing trouble with the centerboard
> trunk. So I have it all apart in the side yard but I couldn't get the
> centerboard back into the truck. The trunk walls are bulging inward
> slightly and the centerboard has a bulge about 2/3 down from the top.
> 
> I tried grinding the bulging centerboard down a little, but I open up a
> hole in the board. A grey/silver power came out of the whole. I'm not sure
> what it is but I'm treating it as if it's powdered lead.
> 
> Does anyone know how the old centerboards were constructed? 
> 
> I'm thinking I will dig expand the hole to level out the bulge and then
> cover it with Marine-tex.
> 
> Any suggestions are appreciated.
> 

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