Cat/Outrigger Cross Beam or Aka Size

Discussion in 'Multihulls' started by BobBill, Jul 1, 2013.

  1. BobBill
    Joined: Oct 2009
    Posts: 866
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    Location: Minnesotan wakes up daily, in SE MN, a good start,

    BobBill Senior Member

    I have noted the beams or akas of the Hobie boats seem to be adapted mast extrusions.

    I have also noted that NACRA 5.2 cats use 4-inch OD x 3.7/8 (.875 thick) ID tubes, strapped in place.

    My question: Using T6061 tube, what diameter would be most appropriate, 4" or 3" or something in between with similar thickness, at 8 foot beam and 20' LOA?
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