He's talking about making it with the .75" side facing up and down vs front to back....
At least that's how I read it.... Most designs that use a solid laminated spar do so with the intent of bending it at the stubs, in order to have full-span dihedral vs gull-wings like the kr2.... which kind of requires horizontal laminations in order to make the bends possible On May 25, 2012 3:01 AM, "Pat and Robin Russo" <patru...@myfairpoint.net> wrote: > > Your question confuses me regarding horiz. and vert. The grain must run with > the length of the spar. If you are to laminate a spar with 3/4" material, > you must (should) start with 3/4" thick x 7.25 (depth of spar)x length of > spar. Ergo, if you spar is 2.25 thk x 7.25 deep you will laminate 3 pieces > that are 3/4" thick x 7.25"wide. DO NOT laminate a stack of 3/4" x 2.25" > stock (about 10 pieces) to make the spar. While 10 laminations could/would > work, it is wasteful, too much labor, too much glue, more prone to > delaminate and will not hold bolts as well. > They are several planes built with laminated spar. I recently did a > Cassutt with a laminated spar. Built it slightly over sized and dressed it > down to exactness on the planer. > Pat > in Vermont > > -----Original Message----- > From: Tony King > Sent: Thursday, May 24, 2012 11:05 PM > To: KRnet > Subject: KR> Laminating spars > > I'm about to start laminating the timber to form my centre section > spars from pieces that are 19mm (3/4") thick. Is the orientation of > the laminations significant? I'm not sure why but all the laminated > timber beams I've seen have the lamination layer horizontal. I can do > this but in this case I'd waste less wood if the laminations were > vertical. Does it matter? > > Cheers, > > Tony King > > _______________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > _______________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
