Euler
Hello,
I'd need to see the numbers on the sections' stiffness, but a keel-stepped mast is typically around 40% stiffer than a deck-stepped one of the same moments, so if you are correct that the two are close to the same stiffness, then the new one will be much more buckle-prone than the old. Have you run the numbers on the ideal moments of inertia for this boat? Again, I don't have access to the data here, but if things are the way they sound, deck-stepping the new mast could be disastrous.
Fair leads,
Brion Toss
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