RE: How Much Glass Cloth to Use for Various Size Fuselages
Multiple layers of fabric is typically stronger. You often need fibers going in varying direction to make a part that has enough torsional and bending stiffness/strength. Also putting the layers at varying orientations (0/90, +/-45) increases the toughness of the fuse. If you put all the layers on the same orientation then the thin laminate is prone to "zippering" along the weave.