Trimaran motorboat / stabilized monohull

Bigger is better 43K at half power!

 

Hi all ! NEWS

I wetted the bottom of my new boat !!!!

12m long by 3.7m large / 450 kg with the motor.

50 hp Suz 4 stock give me 24 knots light load at woot, 20 knots cruising with 0.5l per nautical mile (light load).

Cruising at 17 knots with 6 boys and all the things for camping a week-end. (for 0.7l per nautical mile)

Very nice ride up wind, very very nice down wind !

 

Congratulations Eric!
Both boat and crew look lovely!!

 

Nice work Eric. Interesting subject, and real live prototypes

I've made several other links to your subject thread here from some other forums, and within this forum.

 

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Great job, Eric! Congratulations!

 

Nice project, nice crew, congratulations Eric!

Don´t understand why the heart-lung-machine (seen in the second picture) is necessary?

 

Beautiful boat, Eric!

 

Eric: Very cool. It's really neat to see something neat and different, especially when it works well. Your fuel and speed numbers are impressive, and sound about right for a boat like this- especially considering that the "typical" production model weekend/camping cruiser for six will weigh three times what yours does and take four times the power (and fuel).

 

The thing I find most impressive about Eric's effort is the speed with which he's pulled it altogether - it's only a few months ago that he made a model of the boat... not like the rest of us who like to talk about our 'plans' forever and a day...

This is in no way meant as a criticism, but Eric's consumption figures give rise to an interesting question. There can be no doubt that a multihull like this brings with it some significant compromises - in terms of space, ease of movement, load carrying capability etc. For Eric's purposes, they pose no real impediment. But I can't help but wonder whether all those compromises are worth it for more general use....
Is the achievement of 0.7 litres per nautical mile worth the compromise when 1 litre per nautical mile is so easy to achieve from a more conventional monohull?

 

Rib duly noted, Will I wish I had the time to get another boat together... really, Eric, I too am impressed by how quickly you made this happen. My new one's about the same size and has been languishing on the drawing board for months as "higher priority" stuff gets heaped on top faster than it can disappear.

From a purely economic standpoint? Probably not. But then, no pleasure craft makes sense from a purely economic standpoint. Eric's boat should be able to keep its speed up in rougher conditions than a planing hull of comparable displacement, and it'll certainly attract a lot more attention. It's a recreational vessel- that's enough to justify it, IMHO, even if it's not for everyone.

 

Ooops... sorry Matt... that wasn't aimed at you... not directly anyway

Have to agree with your analysis too...as I said, I wasn't taking a shot at Eric's vessel, as I think it is definitely fit for purpose.
But we are seeing (I think) the beginnings of a market-driven push towards more efficient craft - a good thing I think most would agree. But there's no free lunch in yacht design as you know, so I was simply musing out loud about the relative values of the trade-off's involved here....

 

Thank's all, very nice of you !

My new project is a bit bigger : 15m but should stay very light (around 500kg)

I made a pic with the actual and the futur Samurai to see the difference of usable space.


Some pics with a nice girl for you guys !

 

Did you get an as-built weight on the current one Eric?
And would love to see an interior layout...

 

Interior

My weight is not precise but between 350 and 400kg for the nude boat without motor.
Sorry no recent pic of interior


The kayak fits in the noze of the boat by the hole you can see

 

Kurt Hughes power proa

Heres a neat project by Kurt Hughes: http://www.multihulldesigns.com/designs_other/sp_powerproa23.htm