Ok, Event Horizon and Octopus, where do I start?
Probably you should have a look at www.earthrace.net
I am using the same concept
as they are but I have designed a boat that is suitable for living aboard
, is fast and can be shipped in a 40 ft shipping
Some years ago an Australian company "Incat" and "Austral" started producing fast displacement
ferries which "work" on the basis of "the 16-1 rule", which is, if you design a hull which is 16 ft long and 1 ft wide you will not produce a bow wave so you can go a lot faster in displacement
mode. (general boating
theory is 5 hp /ton for displacement speed whereas a planning hull requires a minimum power of 50 hp /ton) these designs are now in regular use worldwide including the US Navy
They are all Catamarans.
However, it is difficult to build "the fast ferry
concept" in anything under 50 ft, because of buoyancy considerations.
I came across what I call ,the "triflection" concept
which was aimed at the large ship market .
I set about modifing the theory around what i wanted in a live aboard cruiser.
The original "triflection theory" came from an American mathematician who worked on the America's cup race
I built 5 prototypes testing the theory, all were approx 15 ft long.
I found that the angle of entry is critical, flat sides necessary (reduction of friction) and the flat bottom ideal for shallow draft
In initial testing with a 10 hp outboard
(15 ft prototype) there was no bow wave produced at all, even at speed.
However initially there was a massive stern wave as suggested by Event Horizon, BUT as told by the original theory at about 10 knots the boat lifts up and the stern wave flattens right out and the boat takes off. The boat is NOT planning the bow is in the water at all times.
Exactly why the boat lifts up I am not completely sure, but is does happen.
Update on Beau's boat
We are living on board a 39ft Trimaran
which has far more liveable room at much less cost to build than a similiar catamaran.
The outriggers fold in, so we can use a monohull
It will fit inside a 40 ft shipping
container for long distance travelling.
The boat was built by a professional boat building company who build larger vessels and came in much heavier than estimated by the Naval Architect, and the two 30 hp outboards only give me a top speed of 10 knots with a cruise
speed of 7 knots. When I get some money
I will replace the 30hp motors with two 90 hp for a top speed of 20 knots.