Originally Posted by codprawn
There is this design
But not much else. Cats aren't as good in seriously rough seas as a monohull which is why you don't see many RIB versions. It tends to spoil what they were designed for.
The whole point of a RIB is to add extra stability to a monohull - a cat doesn't need this so unless you want a built in fender I don't really see the point.
You could of course look at a Thundercat and scale it up massively!!!
There are some advantages Cod, I owned a 20 ft Nautica cat for about 5 years, I did enjoy that boat. It was powered by a 150 hp Yamaha and moved along pretty good. It was extremely and I mean extremely stable at rest or underway. Generally the advantages I see are this: build it with a decent span (wing) between the hulls and less power is needed due to added lift, a much larger amount of deck space due to width (disadvantage would be needing to deflate tubes to trailer on roads) and a shallow draft capability. The ramp feature that Nautica has introduced is really an excellent idea, the ramp itself is raised and lowered with hydraulic rams, it is excellent for recovering divers, swimming or getting larger heavier items on board the boat, such as a four wheeler. One other advantage is that this boat would be designed to my wants/needs and or uses. I also think it would ride very, very well. The scale of this boat would just about guarantee excellent sea handling characteristics on all but the roughest days.
Anyway, as I mentioned earlier it is all conjecture at this point. A lot of things would need to happen to get this going, one of them being selling War Machine and I am not too keen on that...