At 07:15 PM 6/8/2004, you wrote: >Mark, I noticed on your web page that you laminated the spar caps with the >pieces one on top of the other as viewed with the spar standing vertically. >The plans don't really say, but a spruce list I have from Rand seems to >indicate that the pieces were intended to go side by side, as in the glue >joint going vertical with the spar in the normal orientation.
The ultimate reference book on the subject is ANC-18, Design of Wooden Aircraft. It states that the direction of lamination makes no difference in the spar strength. It is only a matter of convenience and availability. Regions of the spar which have highly loaded bolted connections must have reinforcement in the form of cross banded high density plywood to help prevent splitting. Bolts should not go through a glue line. Don Reid - donreid "at" erols.com Bumpass, Va Visit my web sites at: AeroFoil, a 2-D Airfoil Design And Analysis Computer Program: http://www.eaa231.org/AeroFoil/index.htm KR2XL construction: http://users.erols.com/donreid/kr_page.htm Aviation Surplus: http://users.erols.com/donreid/Airparts.htm EAA Chapter 231: http://eaa231.org Ultralights: http://usua250.org VA EAA State Fly-in: http://vaeaa.org
