T&T: Blister repai

[Terry Etapa]

Larry,

I'm not doing any blister repairs, I've just got a question on the scarf
ratio.

You say:



> Then get a grinder and grind
> away the surface of each blister with 36 grit paper until you are down to
> intact
> fiberglass. Be carefull, don't grind through the hull.


When I specify scarf structural repairs to CFRP, I use a 30:1 taper ratio.
Is there a reccomended ratio for blister repairs?

You say:


> Cut a number of discs out of 10 oz. fiberglass cloth in varying
> sizes ranging from the diameter of the largest blisters, decreasing in
> size by
> half inch increments. Now for the real work.


Are you saying leave a 1/2" overlap per ply?

Just a few questions from a wooden boat owner.

Terry Etapa