Dave has read my question as I intended it. I'm not intending to bend the spar, just to laminate 3 pieces of 19mm timber to make a 54mm piece as it's easier to get hold of 19mm timber.
Cheers, Tony On 26 May 2012 00:05, Dave Acklam <dave.a.kr...@gmail.com> wrote: > 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 > _______________________________________ > 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
