Skinny water boat

I am looking for some suggestions on a skinny water design. There are some serious logistics issues with all suggestions as I am 30 miles north of the arctic circle. First here is my situation. I currently run an 18 ft alumaweld intruder with a 90 hp Yamaha 4 stroke. I have to travel across the sound with some serious swells but I try to avoid more then 5-8 ft. Up river the sloughs I want to run in drop to a few inches in places so this is my plan. Build a very light boat that will flip upside down on my intruder and act as a top but I can flip off, attach a light honda motor (20hp 104lbs) and run the sloughs. I am hoping too keep it under 250 with the motor in case I run aground. But I also need it sturdy enough to carry a moose, maybe 600 pounds of meat. I am thinking very little dead rise with a prop tunnel. Wood and fiber glass is my building material although marine plywood is almost impossible to get. Will this top compromise my current boats seaworthiness? Any help would be appreciated.

 

CGindt,
love a story where you get to bring home 600lbs of moose meat, that's a pretty exclusive club you're in. My suggestion would be something like this .. http://jwboatdesigns.co.nz/plans/trover/index.htm

I'm thinking of one because I like the back story on it & it should pull up between the hulls of a cruising cat ok & the welled motor helps too.
All the best from Jeff.

 

A flat-bottomed Jon Boat or Garvey is what you want, that is a big heavy motor and it will increase draft/reduce payload. Sides should be a minimum of 15" tall.

 

http://www.google.de/imgres?imgurl=...F8YVNXGD8PnygPatICgCw&ved=0CEIQ9QEwAw&dur=157

Tunnel hull design, but it is not skinny.

 

Thanks everyone but my biggest question concerns putting that extra weight high on my intruder. Could that compromise my sea worthiness of my intruder if I hit 5-8 foot waves. Thanks for any help

 

From my experience you need a selfdraining cockpit or at least decked forepeak, stern and sides.

 

If the small boat is only 150 pounds it's less than an additional man in the intruder, no problem at all.......and if the little boat is upside down on the thwarts it's lower than that man standing up.....

 

I would suggest Bateau's XF20

http://www.bateau.com/studyplans/XF20_study.htm?prod=XF20

with the caveat that you design in a self-bailing cockpit (I would make the exposed interior very small).

This would give you a one-boat solution for your problem.

With that being said, if you do go with a two-boat solution, I think you could easily go up to 500lbs on the boat for unsticking from occasional groundings. I've unstuck boats close to 1000lbs when in a half-inch of water.

Also, if you do go with a tunnel hull, be sure to use a heavily-cupped prop to get best results from the turbulent water in the tunnel. Vent the tunnel if you need extra speed.

 

A reduced version of the bateau plans look great

 

How about an inflatable boat with a jet drive outboard?

http://www.saturninflatableboats.com/heavy-duty-inflatable-boats.asp

CGindt, we might have a mutual friend there in Kotzebue, so I sent you an e-mail. E-mail back if it is so.

I thought this old thread might interest you so I searched and found it...

http://www.boatdesign.net/forums/boat-building/22-plywood-landing-craft-35507.html

 

Yeah, I don't recognize anything in the pictures, so I don't think I know your friend. The reason I don't use an inflatable is durability and shipping to get it here would be an arm and a leg. I think I can scrap a build together for much less, especially if I use disassembled pallets for my frame. I already have the fiberglass epoxy through amazon prime. I am scrapping together some plywood (toughest part). Ironically all that soda in your friends boat sells for about $25 a case at the local store. I have seen in some villages where it sells for $5 a can.

 

By the way that jet drive is not going to be nearly as efficient as a prop and gas is $14 a gal in some villages.

 

$14 a gallon! I thought we had it bad. Our time will come I'm sure.

 

Almost finished skinny water boat

Well after 8 months of work, here is the almost finished project.

 

Tunnel

Here is a look at the tunnel