Small Power Boat Plans

Will a 12-metre long, 2-metre wide power catamaran be stable in bad conditions?
My crazy plan is to build a super-long power cat for commuting to work through a large harbour; it has to be that long in order to allow me to cruise at 12 knots, because all boats that are shorter than that are not allowed to go any faster than 5 knots (that’s just the law, and if I went that slow in a small boat, it would take too long to get to work, hence the length).
My worry now: That’s one heck of a long, narrow-looking boat. Will that still be stable? For non-metric people, we’re talking a catamaran the length of two stretch limos, and the width of only one.
Thanks.
It sounds like an interesting plan. I really think it depends how bad the conditions you’re talking about are and how good you are at piloting the thing. Considering it’s about the shape of a chopstick, you’ll need to put some good reinforcement through it just to make sure it doesn’t snap in half. When using it, you’ll also have to be careful you go directly into our out of the waves, because if you go sideways to them they may tip your boat over very easily (although of course it would depend on the depth of the keel). Honestly, I’d make it wider if I were you, or at the very least make it a sort of outrigger.
There’s also another possibility. Depending on the legal definition of a boat long enough to go 12 knots, you may be able to use a standard boat and make only a very small, thin hull extension sticking off the front and/or the back, that would serve no real purpose (not even flotation) besides making the boat longer.
Asif Rangoonwala, Eurobuns (Inspiring Entrepreneurs – Small Companies, Global Ambitions)
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