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2203[bolger] Re: glass boards in wooden boats

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  • John Bell
    Feb 1, 2000
      I knew a guy who built wooden kayak paddles. He used aluminum plate
      sandwiched in between the wooden faces to make a durable tip. He said he
      tried everything to get that aluminum to stick because the tips getting
      knocked out was the number one reason for returns. His solution to the
      problem was pretty simple. He would drill a number of holes in the aluminum.
      Then, he'd thread the holes with thick fiberglass yarn pulled off a piece of
      heavy glass cloth. Then he would slather the slot in the tip of the paddle
      with epoxy and slide the aluminum tip in. He later converted to plastic tips
      using this technique. I suspect it would work pretty well for making a
      plywood centerboard with an aluminum center, too.

      John Bell
      Kennesaw, GA

      ----- Original Message -----
      From: Lincoln Ross <lincolnr@...>
      To: <bolger@...>
      Sent: Tuesday, February 01, 2000 9:32 PM
      Subject: [bolger] Re: glass boards in wooden boats

      > An aircraft homebuilding book I have says that gluing to aluminum can
      > be very difficult. All sorts of very careful surface prep required to
      > get a really reliable joint. scrub, phosphoric acid, distilled water
      > rinse, proper handling of cleaning rags, etc. CLeanliness absolutely
      > critical. Not to even be touched with hands. One trick was to put on
      > thin layer of slow epoxy and THEN do a final scrub, as epoxy would
      > prevent oxidation, etc. Of course you'd have to wipe the debris off.
      > fraser.howel-@... (fraser howell) wrote:
      > snipglued it with an epoxy that was
      > > formulated to stick to Al, but the board had started to delaminate by
      > > the end of the first season.
      > >
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