What's a good method to home build carbon fiber masts? Also, for a
freestanding and rotating mast, what's a good design for the
bearings/embedment. My specific interest is in a freestanding
rotating rig with a wishbone sprit boom with about a 25 foot tall
(7.5 meter) mast on a boat with a max righting moment of 10,000 ft-
lb (1380 kg-m). The hull depth for embedment is about 2.5 ft (0.75
m). I figured this application would have some similarity to a uni-
rigged Elementarry.

Is there a free, written description of the Harryproa strip plank
carbon tow method I have seen reference to?

For those with experience, do you think the following idea has
merit? Use a structural aluminum pipe (T6061 4-in schedule 40) for
the lower section (say 2 meters long), overlay a thin plywood or
strip plank wood core overlapping the pipe (say 1 meter overlap) and
hand lay-up the carbon fiber/epoxy composite with a combination of
biaxial and uniaxial cloth. I have thought through the details of
this process, especially how to get the wood/carbon/epoxy to hook up
real good with the aluminum stub, but I won't try to explain it
here. The aluminum stub would then insert in a high density
polyethylene (HDPE) pipe solidly attached to the hull framing. The
HDPE would therefore be the bearing material. I wonder if this
embedment gives too much friction for rotation.