Quote:
Originally Posted by FishStretcher
As an idea:
3 layers of 10mm/0.394" garolite for a core under the I/O cutout. The middle layer thicker, like lettuce hanging out of a BLT. Maybe CSM in between to make the stack 1.375" That allows a gradual stiffness change away from the I/O cutout, but generally the bigger garolite pieces, the better. Then coosa everywhere else. Kind of a pain to construct, but It gets compressive stiffness and strength where you need it. And attemts to manage a stiffness transition.
If it wasn't so expensive, I would push the garolite out to the first step in the hull.
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I like it! My tooling will limit me though; I probably have to reverse what I think you are saying with the outer layers wider and taller than the middle layer and forward layers. the smallest layer would be in the middle of the sandwich. I tried to show it in this pdf.
Garolite Drive plug v2.pdf
I'm thinking the largest layer goes outside or aft - I don't want any of the edges lining up. This gets the garolite about half way to the first step from the centerline and the entire transom housing surface and bolts are backed by garolite.