The spar cap grain should be at an angle of 45 degrees or more with the wider surface ( the top/bottom surface), not because of strength considerations but to minimize swelling and shrinkage due to change in moisture content. Edge grained lumber has less change in dimension due to moisture than does flat grained lumber.
Gene Lukan elu...@telusplanet.net ----- Original Message ----- From: "Gavin Donohoe" <gavinandlou...@bigpond.com> To: "KR builders and pilots" <kr...@mylist.net> Sent: Monday, September 29, 2003 12:31 AM Subject: KR>Spars > Is it really that important which way the grain in the spars run ?? Do the grain lines run vertical or horizontal when looking from the end if the spar material. > > Gav > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.521 / Virus Database: 319 - Release Date: 23/09/2003 > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html
