Does anyone make a tunnel hull that runs the lenght of the b

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Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 30 Sep 2016, 15:44

http://i2.photobucket.com/albums/y20/ga ... C799CF.jpg


Does any brand make a boat where the tunnel runs the entire length of the boat, making it more of a catamaran?

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LDUBS
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Does anyone make a tunnel hull that runs the lenght of the b

Post by LDUBS » 30 Sep 2016, 17:40

I think there are probably a lot of larger power cats around. For smaller boats, I recall seeing one brand on craigslist called Livingston that has what I think you are talking about, although it is a fiberglass boat. Maybe google images for Livingston. To me, seems like a lot of interior space taken up by the "tunnel".
Have Rod - Will Fish

Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 30 Sep 2016, 18:08

LDUBS wrote:I think there are probably a lot of larger power cats around. For smaller boats, I recall seeing one brand on craigslist called Livingston that has what I think you are talking about, although it is a fiberglass boat. Maybe google images for Livingston. To me, seems like a lot of interior space taken up by the "tunnel".

Thanks, I know the Livingston brand, I'm thinking a tunnel that maybe runs the length but is only a few inches deep. I figure a lightweight tin boat wouldn't need that much "lift" to keep the tunnel free of the surface water and gain a few extra MPH.

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stinkfoot
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Does anyone make a tunnel hull that runs the lenght of the b

Post by stinkfoot » 30 Sep 2016, 20:32

I have a couple of Livingstons and I like them so much for both stability and rough water I searched around for an aluminum version. I found something in NZ, I think it was http://www.alloycats.co.nz/kingfisher-m ... mini-cats.Tried my 40/30 Merc jet on my 14ft Livingston and didn't like the handling much. It is not designed for a jet. FYI the raised tunnel down the middle of a Livingston is great for standing on to flyfish. Two 200lb+ guys can stand and flycast comfortably in my 10 footer. My 14 footer can carry 1000lbs....http://www.33rdstrikegroup.com/index.html These guys also look very similar. What is your application and reason for a full length tunnel?

Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 01 Oct 2016, 15:24

stinkfoot wrote:I have a couple of Livingstons and I like them so much for both stability and rough water I searched around for an aluminum version. I found something in NZ, I think it was http://www.alloycats.co.nz/kingfisher-m ... mini-cats.Tried my 40/30 Merc jet on my 14ft Livingston and didn't like the handling much. It is not designed for a jet. FYI the raised tunnel down the middle of a Livingston is great for standing on to flyfish. Two 200lb+ guys can stand and flycast comfortably in my 10 footer. My 14 footer can carry 1000lbs....http://www.33rdstrikegroup.com/index.html These guys also look very similar. What is your application and reason for a full length tunnel?

Looking for a tinny so I can use it on a local river, I'd rather get a ding in alum. then fiberglass.

The link for those alloycats is great as is the 33 strike group. I only wish they supplied some performance numbers, always nice to see what a boat can do under conditions.

As far as me looking for a full tunnel, my thinking is as long as it's a planning hull less boat in the water means greater speed and or economy.

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Johnny
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Johnny » 03 Oct 2016, 08:57

Crazy, you need to take a road trip over to Cape May
and join the US Coast Guard !!!
then, you would have unlimited access to all kinds of crazy boats (for free)
with the highest horsepower you can imagine.
Going 60+mph in a 40ft GoFast with a 50cal on the bow is the cat's meow !!!
Plus, go out in some the roughest surf conditions known to man. That's a real hoot.
http://www.tinboats.net/how-to-build-a-transom/
http://www.tinboats.net/varnish-vs-polyurethane/
All about Primers = http://www.tinboats.net/primer-and-paint-basics/
Paint, Thinners and Applications = http://www.paintingforpainters.com/

1959 Crestliner Commodore 14'
1959 Lone Star Malibu 14'
1958 Johnson 35 RDE-19 Sea Horse
1958 Johnson 35 RDS-20 Super Sea Horse


sonny.barile
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Does anyone make a tunnel hull that runs the lenght of the b

Post by sonny.barile » 05 Oct 2016, 18:46

Probably not a good idea to run it all the way back in small boat. It will get you more lift when your running but it will make you sink deeper when not planing or at rest as compared to a same sized full bottom boat.

This means the boat needs taller sides to maintain enough freeboard. Now you are adding weight and more above the waterline wind resistance. This may be why they don't make full tunnels or Cats in pocket sizes.


However, Im just surmising......I could be wrong. It has been known to happen a lot. Just ask my wife :LOL2:

Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 05 Oct 2016, 18:53

RiverBottomOutdoors wrote:Probably not since it's a bad idea.
Read the post from stinkfoot post #4 in this thread, click on the links and tell me again how it's such a bad idea.

What's the difference if it's built from fiberglass or Alum.?

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stinkfoot
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Does anyone make a tunnel hull that runs the lenght of the b

Post by stinkfoot » 05 Oct 2016, 19:26

Are you planning on running a jet? My feeling with my 40hp jet was that it was sucking dirty water caused by the wake from both hulls mingling right where the intake was. I tried a jackplate but it was still sluggish. Went back to a 35hp prop.

Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 05 Oct 2016, 20:55

stinkfoot wrote:Are you planning on running a jet? My feeling with my 40hp jet was that it was sucking dirty water caused by the wake from both hulls mingling right where the intake was. I tried a jackplate but it was still sluggish. Went back to a 35hp prop.
No I'd be using a prop for sure.


Crazyboat
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Does anyone make a tunnel hull that runs the lenght of the b

Post by Crazyboat » 06 Oct 2016, 19:59

RiverBottomOutdoors wrote:Loss of displacement.. Increase in drag. Cavatation from trapped air. Bad idea.
So the two builders shared in the link are crazy as well as Livingston brand fiberglass boats? Maybe you should rethink, but thanks for the opinion.

sonny.barile
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Does anyone make a tunnel hull that runs the lenght of the b

Post by sonny.barile » 06 Oct 2016, 20:01

Crazyboat wrote:
stinkfoot wrote:Are you planning on running a jet? My feeling with my 40hp jet was that it was sucking dirty water caused by the wake from both hulls mingling right where the intake was. I tried a jackplate but it was still sluggish. Went back to a 35hp prop.
No I'd be using a prop for sure.

Crazy....your not going to use that tunnel in the Hacky are ya?

BTW I just realized I didn't reply to your PM. Sorry Im getting forgetful in my old age.

Im down by the development. I wonder if I already know you.........

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RiverBottomOutdoors
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Does anyone make a tunnel hull that runs the lenght of the b

Post by RiverBottomOutdoors » 07 Oct 2016, 09:06

Crazyboat wrote:
RiverBottomOutdoors wrote:Loss of displacement.. Increase in drag. Cavatation from trapped air. Bad idea.
So the two builders shared in the link are crazy as well as Livingston brand fiberglass boats? Maybe you should rethink, but thanks for the opinion.

Maybe you should google hydrodynamics and learn the difference between planing hulls and displacement hulls. Thinking is a side affect of not knowing....so nothing to rethink on my end. Good luck with turning your jon boat into a catamaran.

Here's a good site for beginners:
https://www.boat-ed.com/pennsylvania/st ... 101039011/

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