Continuing the exercise, I opened the slot up with a 6mm router bit, cut a couple of V cuts into the back of the sailtrack section to lighten it, and bevelled the sides of the sailtrack section with a plane. Then I glued the rest of the staves together, forming a rough birdsmouth section.
Once this had set up I planed off the sharp edges, then planed it into a sixteen sided figure.
Then finally I planed it further to a 32 sided figure, and sanded it reasonably smooth. I think the results speak for themselves. If nothing else, it's rather pretty.
And now for the moment of truth. 489g for 30cm. That's 1.6kg per metre, or right on 10kg for a 6.1m length. I reckon that's reasonably light.
Nice! It may end up even lighter if you taper the staves, i.e. the mast, as it goes up
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