Replaced most of outer keel in A77, Blue Goose. It was necessary to plane off 10 to 12 mm to get to solid mahogany.
I used resorcinol from Aerodux that CP Adhesives stocks, the glue is also available from Spectrum Adhesives http://www.spectrumadhesives.com/contact.htm Structural joints that I glued 20 years ago using resorcinol are still holding together with no sign of failure. I will be using epoxy for most of the planking.
The next step is beveling and fairing the new keel material for the planking that will run in a continuous monolithic mold like piece from keel box to keel box (without a seam along the center). This replacement planking should work well because it will also be fastened in with the sand keels and keelson.
Thanks I was hoping someone might pipe up with a thought or two on the planking. I believe your concern is valid once the V becomes more pronounced toward the bow but it seems flat enough between the keel boxes. On Blue Goose most of the rot damage was along the center seam and especially along the lowest length of bilge, not providing a joint along as much of the center line as possible should help avoid future rot in this area. Anyway if it doesn’t fair out well after the first couple of layers I can just saw a seam along the center line prior to the adding the final two cold molded layers.
Trevor Thompson said:
Tim
You have taken on a mamoth task. Keep up the good work – it will be worth it!
My only comment on what you are doing is to question the idea of the lack of a joint in the hull laminations on the centre line. My impression of the shape of the bottom is that it will need a joint to provide the “V” otherwise you may have problems fairing the new work into the existing “planking”. Just a thought!
Good job….
A87