I laminated the bulkheads this weekend. One with 1.5 oz CSM, then 2 layers of biax. The other with 2 layers of 1708 double bias (stitch)mat.
I did the latter all at once. Slow vinylester layup. 0.7% MEKP and 60F outside. I used peel ply, then covered with 2 mil polyethylene sheet. Then I flipped it and did the other side. That worked pretty well. The first one with the separate inner layer of 1.5 oz CSM isn't quote as pretty, and at 65F and 1.2% MEKP warped a little. Oh well.
If I did it one more time, I would use one inner layer of 1708DBM, an outer of biax (no mat). Pretty happy with the results. The 1708DBM panel is pretty light and very stiff, and I hope strong. The first with the separate mat is a little heavy.
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