SWATH concept design - Feedback wanted

ps. how about i just draw it then build it like I draw it. Sounds better to me.

As I get down to a shape that can handle what I want it to be able to do. My strategy is to take the displacement below the water line, figure out how buoyant I need it to be (In terms of density), then see how much material I can use to make up for that buoyancy; and where my shape needs re-scaling.

Personally I'm a visual mathematician so for me it makes sense for me to think in terms of shapes.

 

The hard part is knowing where to put that material, in order to come up with a boat that doesn't break apart.

 

For the bit up top may I suggest the styling of the 1960 Holiday House X, later dubbed "Geographic" (more than one was built).

http://thecentralshaft.blogspot.com/2014/04/a-travel-trailer-prototype-circa-1960.html

I've thought it would look nice as the heart of a wave piercing cat myself.

 

Now that is hot.

 

That's the easy part

 

You're confusing authority and experts. Authorities generally have power, experts generally have knowledge. Good authorities, when making decisions and issuing orders, rely on experts knowledge and experience to guide them.

Aside from that, I'm wondering how much of what you need to know you actually know. As Adhoc says, it seems you're just making pretty pictures with no consideration for the strength of materials or their configurations, the weight of various components of the boat or any consideration of the mathematics of displacement.

Do you understand this question can't be answered with just the information you supplied? You've cut the displacement by 66% because of cost, with seemingly no regard to how much displacement is actually needed.

A person has to be reasonable. Casting and building a pneumatic turbine? It's fine to know and understand how they are made, but building one yourself is not reasonable if you ever want to actually get on the water.

 

"Because your own strength is unequal to the task, do not assume that it is beyond the powers of man; but if anything is within the powers and province of man, believe that it is within your own compass also."

"Begin--to begin is half the work, let half still remain; again begin this, and thou wilt have finished."
- Marcus Aurelius

My method will be just to keep trying.

 

update



K i think I have a shape that I can start to dissect

 

I love the disciplined methodical approach.

 

..

 

Looks like it might float. sorta

 

This floats http://www.boatdesign.net/gallery/showphoto.php/photo/1383

 

A few years back Long Ranger, a 99' LOA tri, was up for sale and sure made me wish I had invented bubble wrap (or whatever).

 

Swath like catamarans really work better the bigger they are. The smaller it is the wider by ratio it must be. Think of a Swath like a big table, you want it big enough so that no corner will ever experience greater than than say 15% of weight of anything is not part of its regular cg. A sail or windmill could drastically effect this. Also, from a build point of view the weight of every component becomes verycritical, far more than mono hull. Also consider the strength of the materials involved. I may be wrong but every Swath I have seen is made from steel for a reason.

 

Btw, after several centuries of trial and error, the best ocean going ship design, that can be built for less cost and materials, less maintenance, and will actually survive a storm is..... wait for this.... a monohull...