Top end and cruising speed expectations??

[TnD]

Trying to find a realistic expectation of what kind of performance I'd get out of an Arneson drive. Here's a link to the thread that I posted in boatbuilding. Should have posted here in the first place probably instead of the general boat building section but here's the link to the thread in question that gives the basic outline of the boat I'm trying to designHaving your cake and eating it too.