Fred - Happy Holidays!
With your in-depth calculation methods how would you recommend to calc our Tollycraft's "hull speed". Also, what do you feel our boat's hull speed actually is (before it begins pushing water to climb up onto plane)?
Boat Stats: Loaded weight 21K lbs +/-, OAL 34', moving LWL 32', OAH from WL 12' 6", Deck Beam 12' 6", Bottom beam 10' 6", 2' 9" draft, dead rise 11 degrees, short keel with 9" max depth 5' from stern, full length hard chine...
With our Tolly's (off plane) moving LWL 32' I mathematically calc "hull speed" at 7.58 knots. Having run different speed-to-fuel use tests I've found that while using twin gassres both running an economical fuel-use speed is 6.5 to 7 knots... 2 +/- nmpg With only one screw running most economical speed is 5 to 5.5 knots... 2.75 +/- nmpg. On full plane at 16 to 17 knots 1 +/- nmpg.
Your marine knowledge always interests me. I look forward to learn what you feel our Tolly's hull speed is, and how you calc it.