25853Re: [bolger] another Birdsmouth spar thread.....
- Jan 3, 2003Hi Paul
A hollow Doug Fir stick will certainly be lighter than a solid one, but as
for being stronger, or lighter than spruce....
lists the mechanical properties.
Much depends on your chosen scantlings - Jim Michalak has an article on
hollow masts which gives the math. (lookout for URLwrap)
Your process should work just fine as described. The mast for our Micro was
built from DF as you describe. In addition to squaring the outside with
triangular fillets as you describe, I made a tapered inner reinforcement for
the foot, and another for the partners. Very easy to do. I started writing a
description of the process, but it really wants a diagram or two. If it is
of any interest let me know.
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