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Old 04-18-2010, 12:49 PM
davis davis is offline
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Default Home made pontoon boat



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just curious on you all's in put on what materials u would make a pontoon boat from, im just talking about a 1 - 2 person boat, i was thinking mabe 10 inch pvc as pontoons, or really sumthing thats already prefabed but i'll take any input
Old 04-18-2010, 01:26 PM
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If you can get those plastic 55 gal barrels and seal them closed, they make good pontoons.
Old 04-18-2010, 01:50 PM
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yeah i know, but im not trying to uses barrels for em i want to be able to make the front of the pontoons hydrodynamic by rounding them off in the front or sumthing i know i can come up with sumthin with the pvc idea but barrela i cant cut them round and fill the hole as easy, if i were building a dock id use the barrels, and also like i said i wanna make a small boat. barrels would be a lil big.
Old 04-18-2010, 04:06 PM
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Something like this? http://aquacycleusa.com/original.asp

If my calculations are correct (4.75" radius of the inside diameter squared x 3.1416 Pi x 12" = 850.59 cubic inches. 850"/231" = 3.68 gallons. 3.68 gallons x 8.5 lbs/gallon = 31.3 pounds of support per foot of 10" pipe, minus the weight of the material.)

Using 30 pounds per cubic foot as a close approximation you'll need about 7' of 10" pipe for 200 pounds of carrying capacity with the pontoon completely submerged. More if you want a margin of safety and/or additional load capacity. It is not going to be a small craft. The larger the diameter of the pontoon the better.

Just my opinion.
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Last edited by Jerry D Young; 04-21-2010 at 01:51 AM.. Reason: Screwed up really bad.
Old 04-18-2010, 06:14 PM
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It is only the front of the pontoon that has to be hydrodynamic the rest is there for flotation...make a pointed, vee shaped front to be welded to the barrels and you're set to go...

Check down a few threads (10 or 12) from this one, on houseboats, and check out some of the info there as to makes and models...gives you ideas as to what can and can't be done...

A houseboat has the same space limitations as a RV does--rent either for a week and live in it to experience it first hand...
Old 04-18-2010, 06:47 PM
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yes mr. young u have it nailed and seekher thanx for the input but i dont want that big of a boat or i would make drum pontoons but even if i wanted a boat that big i wouldnt use drums just because it would take a lot of fabrication to make it look ''good'' i dont want a bubba rig i want **** done right
Old 04-18-2010, 06:49 PM
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and mr. young this looks like a very good plan but a lil more fabrication than i want but the size is about what im looking for
Old 04-18-2010, 09:25 PM
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Davis try this maybe it will work for you!
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Old 04-19-2010, 01:19 AM
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I have to appolgize to everyone on the board. I woke up at eleven tonight realizing I'd transposed some numbers in the calculations for how muc 10" pipe would support.

I corrected the post.

I'm really sorry if I led anyone astray.
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Old 04-19-2010, 04:12 AM
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Real bubba workmanship on this 75' x 20'


All a pontoon is a few unpainted oil drums that have been welded together and a prow/bow added...
Old 04-19-2010, 07:52 AM
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Anything less than this is uncivilized:

http://www.glen-l.com/designs/house/huckfinn.html

Its a well thought out set of plans.

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Old 04-19-2010, 08:03 AM
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ha yes ive seen that pic of the lawnchair boat but u guys are getting a lil carried away im looking more along the size mr. young posted in his link
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Old 04-20-2010, 04:21 PM
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i was kinda hoping for more input and ideas though here guys, i realy need some brainstorming here, wut do u guys think of 10-12inch pvc as a start for the pontoons, after they are cut and shaped in the front to be hydrodynamic i guess fiberglass culd be used to cover the front, or i guess i could start with foam blocks and carve them to shape then build a wooden frame around that and fiberglass over everything, i just need help here guys
Old 04-21-2010, 12:46 AM
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Here you go Davis:

Calculating Displacement

"Question - My Dad and I are going to build a sail boat using PVC
pipes for flotation. Is there an easy way to caculate how many 8 foot
long, eight inch diameter pipes we will need to support our weight and
keep the boat floating?
-----------------
The weight that the pipes will support is the weight of the water they can
displace minus the weight of the pipes themselves. To calculate this, you
need to know the volume of the pipes, the weight of the pipes, and the
density (weight/volume) of water.

Fresh water has a density of 1 kg/liter. Salt water has a higher density.
The volume of the pipes can be calculated from their diameter and length by
the formula

V = L pi r^2, where
L is the length of the pipe, 8 ft = 96 in.,
pi = 3.14159,
r is the radius of the pipe, 4 in.

So the volume of a pipe is

V = (96 in)(3.14)(4 in)^2
= (96 in)(3.14)(16 in^2)
= 4823 in^3

Now you need to convert cubic inches to liters. 1 cubic inch = 0.01639
liters, so

V = (4823 in^3)(0.01639 L/in^3)
= 79 L.

So, in fresh water, an 8-ft length of 8-in diameter PVC pipe can float 79
kg minus its own weight.

Richard E. Barrans Jr., Ph.D."

http://www.newton.dep.anl.gov/askasc...9/eng99093.htm

Hope this helps.
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Old 04-22-2010, 09:02 AM
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well trekker keep pics posted i wanna see it as its built
Old 04-22-2010, 08:52 PM
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Default Re: home made pontoon boat

i was reading and an idea popped inside my tiny brain , what about filling the pvc pipes with polyurethane foam , that would be waterproof , plus if the seal ends broken the pontoon will not sink fast cause of the tiny bubbles trapped inside the foam , about 156 years ago my father designed a steel made pontoon for as scuba platform for a job , it consisted of several oil drums secured with Steel clamps that are like a zip tie but made of inox steel the kinds that is used to secure equipment to telphone posts , cause welding the drums was dangerous , they can explode if heated with a torch or when welding (yeah even those that are empty) and welding damged the oil drums making them shatter at the welding points
Old 04-22-2010, 08:55 PM
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Default Re: home made pontoon boat

well yes sir u got an idea in fact i was thinkin the same thing but still fiber glassing em, but the drum idea will work but i want it hydro dynamic if i were building a platform or dock then yes drums would be the route
Old 04-22-2010, 10:02 PM
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Default Re: home made pontoon boat

Quote:
Originally Posted by SeekHer View Post
Real bubba workmanship on this 75' x 20'


All a pontoon is a few unpainted oil drums that have been welded together and a prow/bow added...
Bingo!

We made one while I was in high school out of eight 55 gallon drums. We did not have a welder at my house so we made the floor framing out of 4x4's coated with roofing tar, built a plywood cabin on the frame and made a roof top deck. The motor was an old 15 hp Johnson we found at the dump. the steering was from a VW bug, the stereo was a donated "Craig Power Play" AM/FM/Cassette.

Kid Rock had nothing on us, we did it first, that little floating party palace was a babe magnet... "all summer long!". It did not go very fast, but we where not in a hurry and the police never bothered us. Good times.

I wish I had a picture of the boat but this all took place in the mid seventies, we did not have digital cameras and all my old photos burnt up in a house fire. I came home from college at the end of my freshman year and my floating shaggin wagon was gone!

End of story.
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Old 04-22-2010, 10:13 PM
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Default Re: home made pontoon boat

well a foating shaggin wagon wuld be kick A, but im thinkin of a 1-2 person max boat, like almost as small as those lil fiching tubes/pontoons
Old 04-23-2010, 12:13 AM
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Default Re: home made pontoon boat

Quote:
Originally Posted by davis View Post
well trekker keep pics posted i wanna see it as its built
Howdy Davis,

That was a "quote" from the site where I got the information for you.
Not my project. Just trying to help you out.
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