House boat cat hull plans

Hi there
am looking for houseboat cat hull bilding plans of approx. 18/20 mt. length
This attached one could be suitable
Do you know who is the designer?
If anybody has any infos kindly let me know
Thanks
Adriano

 

What makes you like that rendering ? It isn't a particularly good depiction.

 

optimal displacement, not because of hydrodynamics , the flaoting house most of time will be moored.
Anything better to suggest?
Thanks
Adriano

 

a catamaran is not a good platform for a house boat when compared to a barge shape. Not as good load carrying but more important, the CoG of the 'house" needs to be calculated carefully or the catamaran will trim either bow up/down or have an angle of loll. CofG is likely to be higher as well, less space for tankage down low etc

Better to show an example of a houseboat you like rather than a below WL view

Richard Woods

 

Thanks Richard
Yes you may be right. Actually it should become a party boat rather than a house boat!
It could be something like the attached picture with open top deck

 

The original rendering does look a bit barge-like. I'll call it a bargamaran.

 

Whatever name is fine with me.
As mentioned, it doesnt need to perform on speed, indeed that design shows some good storage space under deck.

 

If speed is not an ambition, ditch the cat idea, and go with Richard's barge. In any case, 18-20 metres still gives a fair speed potential in a barge.

 

you mean simply (or close to) as quared off floating box?
I know cat woud be more expensive to build but with reasonable starage under deck have some advantage when moving on the water,
am also thinking transverse stability when approx 30 or more people lean all together on one side?!
By the way it will be build in composite construction.

 

No, the bow needs some shape, sufficient rake, or you will have a very wet conveyance, and you also want the bottom to rise up to the waterline aft, to avoid excessive drag. A catamaran does not have greater ultimate stability, to a barge of the same rectangular plan. I don't think 30 people on a typical 60 foot barge would have much impact at all.

 

well.. i missed to mention that the beam might habe to be 8/9 mt. this would change the picture relating to cost/stability etc.

 

8-9 m is plenty for that length. And the barge will draw less water than the cat, if that is ever needed.

 

I am British so when you said "houseboat" I thought you meant what N Americans call a "float home" ie something static, which is how we would define it. But you mean something that can move on calm lakes and slow flowing rivers? And yet you are from Italy? so where do you plan to use/moor your boat???

RW

 

Pay close attention to RW and the rest of good advise re stern drag, etc. We see a few on here now and then trying to make modifications houseboats on cat hulls with insufficient displacement. The typical advise is to barge them.

You are starting out ahead if you heed wisdom.

 

It looks to me like the cat hull portion will always be fully submerged. I can't see how they offer much besides increasing draft.