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KrzysziekZ t1_j3p8hdn wrote

More wetted area or cross section must result in more drag. However, some if not more drag is wave-making drag (which is harder to model) and this is primarily dependent on length of the hull, which doesn't change with displacement.

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MeatierShowa t1_j3r37a4 wrote

The length of the hull doesn't change, but the waterline might, depending on hull shape. I think it's known in sailboats that if you load it down to increase the waterline you might get a little higher hull speed.

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