"Te Canaille" wrote in message
newsUqoc.144857$f_5.80076@lakeread01...
Riverman :

Thanks for the response and advice. There was some wishful thinking here
for an easy solution and I think you're probably right and
reckon I won't fuss with this.

The thing about shortening the thwarts brings up an interesting point. A
few years back Mohawk Canoes came out with an adjustable
thwart, mainly for whitewater canoes. The paddler could twist it to
shorten or lengthen. I called Daryll and spoke to him about this
and he maintained that shortening the thwart decreased rocker. The canoe
in question already has a flat keel-line. What I would like
to do is add a slight amount of rocker to stop the oil canning and
increase maneuverability and an arched bottom to increase
secondary stability. I wondering about the memory of Royalite. If I strap
( or add a shortened thwart ) the hull amidships to arch
the bottom for several months would it just bouce back to flat or retain
some arch ? My guess is that it would retain some arch for
a while but eventually flatten out. This will be the third canoe I've lost
to oil canning and it'd be great to figure out a
solution.


Its true that shortening the thwarts decreases rocker. If you want to do
both, I did see someone who cut slivers out of the side of the boat,
basically removed a triangle, to create rocker.

He cut two pieces from each side, the base of the triangle on the rail, the
point right down at the chine (even curling just a tiny bit around the
bottom, like a few mm.) The pieces were each about 1/3 the hull length from
the ends, maybe a hint closer to the center. The base of each triangle
removed about 1 inche of rail, but the resulting 'suture' raised the ends
up several inches (you can do the math).

It would be interesting: remove two slivers from each side to OVERcreate
rocker, then shorten the thwarts to round the bottom, and remove some
rocker. You'd have a pretty unique boat when you were done. Personally, I
think I'd work on the hole-in-the-sand method..

--riverman