Brodhead Pietenpol Association

Original Posted By: Earl Myers
Subject: Pietenpol-List: BOX SPAR CONSTRUCTION>For those of you who have experience with built-up spars, I have a few>questions.>> 1) What are the H & W dims of the caps?> 2) Does grain orientation matter on the plywood faces?> 3) Does grain orientation matter on the caps?> 4) Did you truss or bridge the interior?> 5) Do you internally reinforce the attach points?> 6) Assuming a finished spar of 1"width, are ribs attached in the > same manner as a solid spar?>>>Mike Cushway> Mfg. Engineering> >>________________________________________________________________________________

Original Posted By: larryc
For those of you who have experience with built-up spars, I have a fewquestions. 1) What are the H & W dims of the caps? 2) Does grain orientation matter on the plywood faces? 3) Does grain orientation matter on the caps? 4) Did you truss or bridge the interior? 5) Do you internally reinforce the attach points? 6) Assuming a finished spar of 1"width, are ribs attached in the Mike Cushway Mfg. Engineering ________________________________________________________________________________

Original Posted By: Cushway, Mike
Mike; Yes to all, details to followEarl Myers-----Original Message-----

Original Posted By: Dougl52955(at)aol.com
Mike, I made box spars for my Woodstock. This is how it went.then the spar width)from flat I like box spars, but I would build a six foot piece and test it to failure, and then test a piece of spruce. Then you know!________________________________________________________________________________