Cat bulkhead design

They all have similar weights. You still have lack of space. Two outboards will take close to half the interior space of your vehicle. It makes no sense, regardless of engine brand.

 

Why I'm thinking about 3.5t van ? .
1 Up to 7 person (on the paper) 2+2 in reality .
2 No road fees . EU is a sick place when it comes to road transport.
3 Low boat storage costs, easy transfer to even a remote location.
4 Minor van modifications, flatbed cargo van easy for other tasks.
5 Van assistance during launching/landing/fueling.

 

What do you talking about ? Flatbed area is over 13' long and 8' wide . Longer elements are legaly transportable .

 

Weight is similar but they are different animals everything depend of tusk . E.g. short Toh 60 .

 

Park it up for a bit and ask yourself if Montero Engineering is the best idea for a young family?

 

Yes. I'm trying to rationalize throwing money into a hole in the water - I'm doing it for my family...

 

Not really. They are the same animal in different coat colors.

 

I wasted an entire evening researching trailer transport. It's pointless. The fees, the hassle, and the weight of the trailers are frustrating.

I'd rather get on a truck than buy a trailer.

 

Missed out on a pair of 135 hp Optimax XLs. Cheap and around 300 hours. I kind of regret it because there were XL right and counter.
Good for faster cruising .

 

If you load those two engines in your van, for which you need a crane, there will be no space left for the boat or your family. Two engines plus a mobile crane will take all the space. You keep on wasting time in a project that is unfeasible. Get back to the real world and its limitations. At the start of the thread you stated you are poor and lazy. That is a bad combination. If you are poor, then adjust the expectations to your budget. A pair of 135HP outboards will use about 102 lt/hr wide open and maybe 70 lt/hr at cruise speed. At E$1.50/lt or so, can you afford E$100 and hour? It is not a budget for someone who claims to be poor.

 

I just feel that one liter fourstrokes are weak power source for this cat . Maybe I will build basic boat structure then I will do some research. Have pair of 30hp Toh2T at the beginning.
Or I will build two 60kg/180hp Frankenoutboards for moving litlle bit faster.

 

This is a ridiculous claim. You will build a motor that weighs less than 1/3 of a Yamaha of that power. You can't even figure out how to calculate basic things. I can't see you doing more than making claims and never getting in the water. However, I may be wrong and you have a source of unobtanium and antigravity alien technology.

 

While contemplating this folding catamaran, I realized that it was even feasible to build a larger, 16-meter amphibious catamaran with gasoline land propulsion and outboard engines. Previously, I had only considered diesel engines.

Route: Europe-North Pole and back.
LOA: 15-16m
Weight estimated empty: 3T
Gasoline: ? Depends on winds, sails, and kites.
The construction technology is the same as the Mediterranean catamaran.
The only alien technology is the use of parts not intended for ocean use.

 

Now it makes sense. Since the North Pole is in the Artic Ocean the most logical conclusion is to design and build a boat with parts that are not intended for the ocean. I recommend to build it from mummified camels. The structure should be styrofoam for light weight.

 

The reason I built my first boat was simple: they seemed boring and heavy. I try to stick to that pattern.