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Wing tip failure

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williamtsullivan(at)att.n
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Posted: Tue Sep 01, 2009 1:16 pm Post subject: Wing tip failure

Mike- I remember that discussion from last year, and the small braces seem to be the culprit.  My old Firestar is one of the early ones, and prior to my getting it it had been flipped over in a northeaster when a tie down rope broke.  There was also a little rash on it, covered with tape.  The tip braces in question were not broken on mine, and the builder had wired a small block of foam where the braces crossed.  No chafing, either.  The other wing set that I had was dated about 1989.  Even after my accident, no breakage there, but I seem to remember some rub marks.

   I don't think it is a design problem.  A little care when assembling, and not over crushing the tube ends would seem to eliminate the problem.  

   The little foam block was about 3/4" square, and about 1/2" thick.  It was held in place with twisted wire.

  

            �            �           �         Bill Sullivan

            �            �           �         Windsor Locks, Ct

            �            �           �         FS 447

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