26833Re: motorsailer under 20'
- Mar 5, 2003
> strip planked rather than carvel. - PHVThere are lots of variations on wood construction, and they blend
> I'm not sure I know the difference ?!?!?
into each other but "carvel" generally means planks that are wider
than they are thick with caulking between planks. "Strip" means
planks that are about square in section, and glued and/or nailed
I think a big difference is that carvel inherently allows for the
planks to swell as they absorb water; the caulking takes the stress.
Strip assumes the planks won't change shape. Bolger describes
planking being forced off the frames by the stress from swelling. As
such, strip is a more modern construction made possible by waterproof
glues and improved by things like epoxy that help keep the wood dry.
The downside of strip construction is that the whole hull has to be
surface finished, i.e. planed and sanded. (True also of carvel, but
there are fewer seams and they are not dripping glue.) As I
understand it, strip construction got its start in Maine where
fishermen/lobstermen used it to build their own boats. The strips
were cheaper than yacht-quality planking lumber, and the required
skill level was less.
Bolger's Resolution is carvel with cedar ceiling on the inside of the
frames, and he has often written that it is the most pleasant
construction to live with. Not an easy boat to build, however.
Somewhere Bolger wrote somewhere that there is a timber that twists
90 degress between each end and the middle, and that he was glad the
he wasn't responsible for telling Story (the builder) how to do it.
I am not much of a boat BUILDER at all, but I do think that amateurs
are too fixated on the apparent easiness of ply construction when
they don't have any experience with other types. If fitting a single
strip is easier than fitting a huge panel, as I suppose it is, then
strip construction should be easier than ply construction. If the
boat you want uses an other-than-ply-panel construction, then the
best path to the boat you want may be to expand your skill set,
rather than searching for a design in a supposedly easier
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