Conner, I never asked him about the boat with the big chines. On the boat with the sponsoons he said that he was trying to create more lateral stability and correct the heeling to port side which my boat does do a little as well. Here is one of his e mails addressing this.
"The attached SeaCraft 25' picture shows the boat before modifications. We have been tricking it out with outboard sponson additions (ama in Hawaiian) to improve stability and are presently installing engines and fuel layout which gives an extremely forward LCG to improve seakeeping via lower running trim and higher moment of inertia. With this LCG you don't get much bow rise to get on plane. We have some patent pending tricks to the running hull bottom to provide increased forebody lift and ventilation to increase efficiency via better trim and less wetted area to offset the drag that is the negative of a such a forward LCG. Bottom line is that with a LCG of 37% of waterline length, we get the same speed as one set up race boat style at 27% LCG. Design lightship is 5300# and max displacement 7500#. While we have played with other hulls that have as good a head sea ride it is an unbelievable hull that even at these full load displacements we haven't been able to stuff the boat running downsea.
We used the amas instead of large trim tabs to achieve transverse stability at rest as well as running. Also, the amas stopped the chine walking and port heeling we were getting with all the single engine 25's we've tested. The other advantage of our final layout of pushing the engines and fuel so far forward is the clear aft deck area for fishing, coolers and other payload. The engine box serves to give us a raised command bridge."
strick
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