3 basic grain types for sheet balsa

In selecting balsa sheets for need, it is important to consider the way the grain runs through the sheet as well as the weight of the sheet as we discussed above. The grain direction actually controls the rigidity or flexibility of a balsa sheet more than the density does. The following chart illustrates the 3 basic grain types for sheet balsa and lists the most appropriate uses for each.
A-Grain
A-Grain sheet balsa has long fibers that show up as long grain lines. It is very flexible across the sheet and bends around curves easily. Also warps easily. Sometimes called “tangent cut”. This cut should be used for sheet covering rounded edges, planking, forming tubes, strong flexible spars.
B-Grain
B-Grain sheet balsa has some of the qualities of both type A and type C. Grain lines are pxbkctbsd shorter than type A, and it feels stiffer across the sheet. It is a general purpose sheet and can be used for many jobs. Sometimes called “random cut”.
Use for flat fuselage sides, trailing edges, wing ribs, formers, planking gradual curves, wing leading edge sheeting in model aircraft.
C-Grain
C-Grain sheet balsa has a beautiful mottled appearance. It is very stiff across the sheet and splits easily. But when used properly, it helps to build the lightest strongest models. Most warp resistant type. Sometimes called “quarter grain”.
Use for sheeting balsa and foam wings and tails, flat fuselage sides, wing ribs, formers, trailing edges in model aircraft.
Article resource: http://www.balsafactory.com/ .