Help me design the AmphiCat

[Amphicat]

Thank you everyone!
I'll reply to all your messages tomorrow!

 

[Amphicat]

The easiest, and (almost) free option is some sheets of A3 paper, a ruler, a couple of soft (at least 2B) pencils, an eraser and a standard set of French curves (you probably had a set at school?).
Try it. I think you will have fun drawing it out manually.

Mathias, please bear in mind that if you buy a set of plans for a boat, not only are you buying the plans (which will be comprehensive), you are also utilising the knowledge and experience of the designer, along with a guarantee that if you build the boat as per the drawings it will do the job that it was designed to do.

There is no shame in buying a set of plans - the cost might be 1% of the cost of building the boat.
You will learn a lot from having a set of plans to work with - and if you really want to change something, modify it because your idea is better, then you can do it (although it might be a good idea to run it past the folk on here first).

I did some drawing by hand now. I'll upload some pictures in a little bit! (Probably late tomorrow evening)

About buying plans, there's some problems with that.
The cost is VERY significant for me, also I won't be building it as the plans. Every measurement will be so different, and the weight distribution will be different, because I will have different equipment.
Also I want wheels on my boat -there's no plans out there that fits the bill.

I need to know more basics, so I can make better modifications to a design. I checked out a lot of study plans, and my design idea is in some ways very close to the Skoota, but in other ways really not ;(

Again, thanks for the reply man! I'm taking it in! Been looking at more boat plans too!

 

[Amphicat]

A detailed SOR, an elevation and a plant of the boat, even by hand, will be enough to start.

I'm not sure what kind of requirements is meant by SOR.
And elevation of the boat above the water line or?
I want 2,1 meter headroom in most of the boat (really tall.. I know..)
I'll upload pictures tomorrow

 

[Amphicat]

Do not design a boat. You will end up disappointed.

Buy a suitable design and then do the layup (on changeables) with paper and pencil and eraser.

Naaah.
Or...
I'll learn from other designs (of course) and follow the principles of them, but I'll design the cabin myself.

 

[Amphicat]

Did you look at the work of the Berndt Kohler?
POWERcats https://ikarus342000.com/POWERcats.htm

That's cool!
I'll use that floor plan of the 7,5 meter as inspiration. Also, really like these boats a lot!

 

[Amphicat]

Here is a very neat and simple application of beaching wheels to a small coastal cruiser by @Tiny Turnip
Around Jura by half https://www.flickr.com/photos/tinyturnip/albums/72157719822032375/with/51422335952/

However they do not have the luxury of a waterborne caravan; rather, they pitch a tent ashore when they arrive at their destination (and wheel the boat up the beach).

Oh I love that application of wheels!
But I think I have a better idea Also, cool idea to tent! I would love traveling like that sometime!
But that's for another boat, some other time

Also, it is a full electrical motor-driven boat No sails attached

 

[TANSL]

SOR: Statement of Requirements. Type of boat, construction system, hull materials, what the boat will be used for, conditions in which it will navigate (design category), number of people on board, type of propulsion, desired speed, range, regulations to be met, deck equipment, equipment navigation, machinery in general, number of cabins, lounges, toilets, description of the accommodation, furniture, electrical equipment, generators / batteries, piping system, fire and comfort insulation, air conditioning..... everything that is necessary for the designer to create exactly the boat you are thinking of.

 

[Amphicat]

SOR: Statement of Requirements. Type of boat, construction system, hull materials, what the boat will be used for, conditions in which it will navigate (design category), number of people on board, type of propulsion, desired speed, range, regulations to be met, deck equipment, equipment navigation, machinery in general, number of cabins, lounges, toilets, description of the accommodation, furniture, electrical equipment, generators / batteries, piping system, fire and comfort insulation, air conditioning..... everything that is necessary for the designer to create exactly the boat you are thinking of.

Catamaran boat -Houseboat. Small as possible while still comfortable.
Fiberglass epoxy-composite layer. Hand layup and vacuum infused epoxy. could be nice with a very thin wood layer (4mm) as a floor. I need to find some cheap wood, so I can't be too picky. But density of wood won't be more than 500kg/m3.
Sealed waterproof of course.

Design category B if possible with small changes to my design idea (pictures coming), but not a must. C will do.

2 people on board, but could be nice to have room for 4, just to eat dinner on the boat.

* Not sure of the type of propulsion I want. Gotta decide on that!

Desired max speed is 15 km/h, but I'm fine with 10 too

range is totally dependent on the money I have for batteries... But at least 40 km is good to begin with.

Regulations:
Not more than 2,5m wide. That's a must. 2,53 with fenders MAX.
No sails. No nonsense.
Lightweight.
Easy and fast to build.

Deck equipment is all in the google docs document.

1 big cabin, 2.1m tall. With 1 small room with a toilet.
Power generation is solar-panels on the roof and a wind turbine.
Batteries in the hulls.

* Not sure if I'm gonna need any piping system at all.
If I have room for a shower, I'll need also need a way bigger water tank than I originally wanted. But maybe yeah...

Insulating qualities of the boat is one thing I'm worried about.
Air condition will be a small vent and a wall/ceiling fan. Nothing fancy.
I don't know if I can get cheap foam, so that's a problem for me. Is it needed?
I'm not too scared of fire, but I have a fire blanket and an fire extinguisher-spray. I will coat the inside with some fire retardant too.

One thing I'm really worried about is noise.
How can I dampen the sound of the sea, the waves and the boat without making it heavy?

Anyway. Pictures tomorrow!
I'll think about propulsion and if I need a shower onboard.