I was thinking if the planks were dry and shrunk then further drying wont
cause any splitting
The only pressure will be when the planks absorb water, now the planks are
under pressure anyway when wet, this is what seals the seams. I assume when
the boat was built, the inner plank edges were touching, the outer edges
were angled away so you can put in caulking.
I know a lot of you dont like the idea of planks pressuring each other but
is not this what happens anyway when they soak up water sealing the hull in
a conventional design?
People think something has to give if the edges are joined but are many
just making assumptions about this with no real experience.
"William R. Watt" wrote in message
...
Phil Bolger once started builing a hull that way but gave it up when he
found out how much the adhesive was costing, and finished it the old
fashioned way. You might want to cost out the project before getting
started.
There are more flexible adhesives than epoxy. You might look into some of
them. I've heard of polyurethane being used on lapped strake (cliker)
hulls.
Seams above the waterline tend to dry out and open up while seams below
the waterline swell up tight. If glued seams can't open as the wood dries
the wood may split. TF Jones encoutered this after 10 years on a lapped
strake canoe built light with thin strakes. That canoe was kept inside out
of the sun when not in use.
"Scott Downey" ) writes:
http://www.azom.com/details.asp?ArticleID=1116
Glued Carvel
Plank edges may be shaped and glued with a thickened epoxy mix or
alternatively the seams of dry fitted planks may be routed later to a
constant width and fitted with wooden splines which are glued into
place.
This latter method is the usual treatment when a traditionally built
carvel
craft is reconstructed using epoxy adhesives as part of a full
restoration
program. Sometimes a thickened epoxy mix is introduced into the seams as
an
alternative to wooden splines and this seems to be just as effective in
fastening the plank edges together. The planking is also glued to the
spine
and framework, which on new boats is built of laminated hardwood, glued
and
coated with epoxy.
--
--------------------------------------------------------------------------
----
William R Watt National Capital FreeNet Ottawa's free community
network
homepage: www.ncf.ca/~ag384/top.htm
warning: non-freenet email must have "notspam" in subject or it's returned