As weíve been discussing weight Iíd appreciate an opinion on end-grain balsa and fiberglass sandwich panel. I want to use that material, branded DecoLite, as Ĺ-inch thick fin stock. An 8x4x1/2 sheet of DecoLite is $250. Itís half the weight of plywood and just as strong. Most important, the shear modulus of the balsa core material is 23,000 PSI regardless of shear direction. Shear modulus of 1/8-inch cell Nomex paper honeycomb is directional and as low as 5,000 PSI in the width direction.
I think the balsa panel is a better choice than paper honeycomb panel. Itís ďstifferĒ and less likely to flutter. Any opinions?
Material comparison and a picture are below.