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Re: [bolger] birds mouth boom for bolger bobcat

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  • Derek Waters
    Hi Bob Jim Michalak has a good essay on hollow spars, including calculations for comparing round and rectangular spars. (Feb 00). John O Neill wrote a two part
    Message 1 of 2 , Feb 3, 2002
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      Hi Bob

      Jim Michalak has a good essay on hollow spars, including calculations for
      comparing round and rectangular spars. (Feb'00).
      John O'Neill wrote a two part article on birdsmouth spars for Boatbuilder
      magazine. The Jul/Aug '01 issue has the calculations for elliptical section
      spars.
      Gregg Carlson has a neat program (available at www.carlsondesign.com) for
      calculating strip sizes for round birdsmouths.

      Although a birdsmouth enthusiast, I'm curious as to why you would build the
      boom this way.

      Cheers
      Derek
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