try Dave Gerr, for power required. He makes some dumb comments regarding theory
but his formulae are "close enough" to be more than useful for specific power
needed for specific speeds for "displacement" type boats. Double check with
your propeller vendor, and LISTEN to them, for they have some views that don't
necessarily map one to one with DG's thoughts.

btw, Bob Perry publicalycalled me "an asshole" (his words, several times) for
pointing out that a sine function does not EXPLODE at zero degrees (in fact it
does nothing at all at zero degrees), which of course means that tens of
millions of people across the country are -- by Bob's definition -- "assholes"
for knowing from sine functions.

Welcome back Jax.

We are looking forward your enlightening explanation of how to calculate
hull power requirements.

Mark Browne