ORIGINAL: Gray Beard
My youngest student and I are building the 4*60 kit right now and one of the things I noticed was the shear webs are built in and part of the spars, front and rear. The built in shear webs are cut out of Hortizontal grained balsa and each is A seperate one piece part running the length of the spars. I didn't say anything to him about shear webs at all, the build is hard enough on his young mind and it can wait until his next build.
No problem, this will be as good as having the grain vertical. If you check the regulations for shear webs on full scale aircraft, you will find that they recommend the grain to be at 45 degrees to the span, actually a ply with one having the grain 90 degrees to the other but both grains being 45 degrees to the span. The shear forces are always at a 45 degree angle and shifts 90 degrees depending on the direction of the load (upright or inverted).