Pietenpol-List: BOX SPAR CONSTRUCTION

matronics · Post by **matronics** » Wed Sep 15, 1999 7:16 am

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> >>________________________________________________________________________________

matronics · Post by **matronics** » Wed Sep 15, 1999 10:07 am

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 ________________________________________________________________________________

matronics · Post by **matronics** » Wed Sep 15, 1999 12:54 pm

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

matronics · Post by **matronics** » Wed Sep 15, 1999 4:09 pm

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!________________________________________________________________________________

Brodhead Pietenpol Association