Originally published May 1997
At the 21 January meeting, Russ said that Lexan® or Plexiglas® easily breaks when screws work on it when fitting it. Not so if you use good fitting procedure: Countersink the hole, use a Tinnerman washer, and a larger hole than the screw. It is often easier to countersink first, then drill the center hole. The screw never works directly on the glass. (Be sure to also avoid scratches at all costs--scratches create stress concentrations that lead to cracks.)
Contents of The Leading Edge and these web pages are the viewpoints of the authors. No claim is made and no liability is assumed, expressed or implied as to the technical accuracy or safety of the material presented. The viewpoints expressed are not necessarily those of Chapter 1000 or the Experimental Aircraft Association.
Revised -- 20 December 1997