I've built a couple outrigger canoes while I was living in the Philippines.

Not exactly what you had in mind..

The logs that these canoes are made out of can only be obtained by illegal
loggers since the government controls all logging.. So if your a boat
builder, you just mention that you want a dugout of a certain size and
shape. In a couple days it arrives at your gate.

Their outrigger canoes "Banca" have the dugout only as the lower portion of
the hull. The log is shapped with ax and knife, inside and out. They put
some nice shape in the bow and stern so it will slip through the water
easily.

The builder has to raise the freeboard with some ply and framing.. However
this process is started by fitting a stem and a stern post. A rabbit is cut
into the upper edge of the dugout and 1/4" ply is fitted, then a cap on top
of the ply and then the frames.. A few supports for floor boards, an engine
bed for a 10 to 15 hp air cooled engine.. Shaft log for 3/4" ss shaft and
hand made prop.

Oh, can't forget the outriggers.. There are numerous types of bambo. The
cross pieces are a kind of rattan and are solid and bent to shape using a
hot fire.. The outrigger floats are the large hollow bambo and if you can't
get them large enough, you get several and bundle them together.. All this
stuff is secured with nylon fish line for lashings.

A properly built Banca can do about 30 mph with a 10 hp Wisconson. The ones
with a 4 cylinder Toyota can out run the harbor patrol.

Steve
s/v Good Intentions