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The Alon parts manual calls for a standard AN bolt for the wing attach fittings, and I think all the other models of the plane use the same bolt. By definition, a standard AN bolt is not a close tolerance bolt - so the fit of the bolt in the wing attach fittings is not critical (within certain limits, of course). The wings are held tightly in place by the torque on the bolt. The torque on the bolt develops friction between the "plates" of the wing attach fittings. The friction between the plates is what keeps the wings from moving. If the holes in the wing attach fittings are worn, or if the bolts are worn, then at some point in the life of the plane, those bolts were not torqued properly. If they were torqued properly, the joint would have no relative motion in it (because of the friction between the plates), and the parts would not have been able to move causing the wear. If you hear a clunk when you lift your wing, and IF that clunk is coming from the wing attach fittings, then in all probability it is because the bolt is not properly torqued. The design and theory behind bolted joints is thoroughly discussed in mechanical engineering text books if anyone wants to look it up. And of course.... all of this is just my opinion, so take it for what it's worth. I would consult with an aeronautical engineer before I did anything to change the design of the wing attach joint. In my opinion, if worn parts are found, then they need to be replaced with factory original parts, not rigged with sleeves or wrapped with shims. Good Flying, Wayne DelRossi Alon N5618F GYH Greenville SC __________________________________________________ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] ___________________________________________________________ T O P I C A http://www.topica.com/t/17 Newsletters, Tips and Discussions on Your Favorite Topics
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