At 11:30 PM 5/4/2005, you wrote: > My personal feeling without seeing how far the hole was >missed is that it MAY be perfectly adequate to repair the hole by filling it >with epoxy (don't know about the dowel with the grain in the completely >wrong direction).
This is a bad idea. Epoxy is not as strong in compression as the wood. It would tend to deform and displace which would allow the bolt to move. >One thing I would look at is what side of the hole will >the repair be on? I would think that if you missed along the grain instead >of accross it that would be better. This is immaterial. The strength from a properly designed wooden spar does not depend on the grain orientation. The strength depends on the longitudinal fibers. The bolted joint in a wooden structure transfers the load into the wood by compression. The force acting on the bolt pushes against the wood fibers. As long as the applied force times the area being compressed is less than the allowable compressive strength of the wood, the joint is good. In the case of a KR main wing attachment fitting, it also acceptable to drill certain (meaning only the correct ones) to 1/4 inch. You can contact me off the KR network and I will provide appropriate reference material. If it is done wrong, the attachment will be weaker. Done right, it will be stronger. Don Reid - donreid "at" peoplepc.com Bumpass, Va Visit my web sites at: AeroFoil, a 2-D Airfoil Design And Analysis Computer Program: http://aerofoilengineering.com KR2XL construction: http://aerofoilengineering.com/KR/KR2XL.htm Aviation Surplus: http://aerofoilengineering.com/PartsListing/Airparts.htm EAA Chapter 231: http://eaa231.org Ultralights: http://usua250.org VA EAA State Fly-in: http://vaeaa.org
