F200/F175 or smaller?

[Bushwacker]

Dave,

I didn't realize the Tracker models had a hook in 'em! Probably makes sense as they were newer boats and rigged with heavier motors. Is it just the innermost panels or do the other panels also have a hook also?

Didn't we find some rocker in the aft 3-4' of the innermost panels on that Potter 20 CC project boat you picked up? I think that rocker would provide more speed potential than a boat with a hook because you could get more hull out of the water at high speed, although it would be more sensitive to motor weight and CG location.

I was doing some prop testing in flat water on my stern-heavy rig last week and noticed that, at about 25-28 mph, I could trim out to about 50% trim with no porpoising. As I increased speed at the same trim setting however, it would start to porpoise once I got up to about 35 mph! The '69 Boating Magazine test data (attached) on the 20 Seafari shows an increase in running angle above 35 mph, and I suspect that may be a result of some rocker built into the Moesly/Potter hull. That should provide some extra speed in a normally balanced hull, but if is a hull is already stern heavy, I could see how that rocker could make it less stable at high speed! (Carl said the CG on the I/O models is further forward than on the OB models, and it's definitely further forward than it is on mine with the bracket and heavy motor!)