Gramp's shop wrote:
Hah! Now all I need to do is figure out how to draw an arc with
an
18 foot radius :-) I have a couple of ideas and will post pix of
the process.
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"Just Wondering" wrote:

Two lengths of PVC pipe. Drill a hole in one end, attach a pencil
to the other at 18'. Draw the arc on the ground, spiking the
pivot
end in the ground and putting the wood at the pencil end.
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You've obviously never done this.

Lew
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I couple of "trammel points" on a piece of steel pipe, along with
two humans, may work. What is your solution?

Bill (who just happens to have 40 feet of Schedule 40 black pipe)

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Lew Hodgett wrote:

From a previous post.

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Find a copy of Fred Bingham's book, "Practical Yacht Joinery"
at the library.

A very easy graphical solution is shown.

I laid out all the deck cambers for my boat using it.

Lew