Adding and extra 1/8" plate to my boats bottom

A general, non-powerplant specific, discussion on airboat technology, ie., hulls, rigging, polymer, etc..
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F0zzy2
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Adding and extra 1/8" plate to my boats bottom

Post by F0zzy2 » Thu Nov 19, 2015 9:09 pm

So I'm replacing the Poly on my 04 silver dollar this winter. I just got all the old bolt holes welded up and all the dents out of the bottom that I could. I was thinking of welding a 6'X6' piece of 1/8" aluminum plate to the exciting 3/16 bottom in hopes to help stop rock damage. pretty much all the damage occurs at the back where transom meets the bottom and forward of that about 4'. I think it will give me a nice flat surface to put the new poly on and give me added rock protecting but i'm wondering if its worth adding the weight. What do you guys think?
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jeepinocala1111
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Re: Adding and extra 1/8" plate to my boats bottom

Post by jeepinocala1111 » Thu Nov 19, 2015 10:03 pm

Never built an aluminum hull but my metals experience background gives me a first thought of why add to metal that is either to thin, worn out, fatigued, or incorrectly supported. Replace the bad material if bent it is fatigued, or stretched out. It's your boat if it were mine I'd do it right and thats not adding a sheet or bandaid. Is it a sled style?

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trailerdon
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Re: Adding and extra 1/8" plate to my boats bottom

Post by trailerdon » Thu Nov 19, 2015 10:27 pm

Stainless Steel sheet on bottom. AKA Rock boat

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GCRedfisher
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Re: Adding and extra 1/8" plate to my boats bottom

Post by GCRedfisher » Fri Nov 20, 2015 4:50 am

jeepinocala1111 wrote:Never built an aluminum hull but my metals experience background gives me a first thought of why add to metal that is either to thin, worn out, fatigued, or incorrectly supported. Replace the bad material if bent it is fatigued, or stretched out. It's your boat if it were mine I'd do it right and thats not adding a sheet or bandaid. Is it a sled style?
That would be one wicked bad azz boat with that motor and reduction if it was a "Sled Style"
I do believe it's the 18x8 Silver Dollar in his sig. Pretty much a big ole duck boat . I do know a guy who did the stainless on the bottom with 3/8 poly, his is holding up great on rocks and oyster bars .
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Re: Adding and extra 1/8" plate to my boats bottom

Post by barhopper » Fri Nov 20, 2015 6:34 am

I know a couple guys running stainless instead of poly. Looks alright but they report it's not very slippery. I personally don't see the advantage. The stainless seems thin and I don't believe it will stop hull denting due to rocks and such. I just had my hull straightened this summer. What a difference! The guy that did it has some type of jig/press that rides on the t bars. Boat rides 100% better. Added a few more t bars also. If you add a piece of aluminum to the bottom I think it will adversely affect the ride, especially on water. When you run rough country you have to expect damage. I wear out polymer about every four years.

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Re: Adding and extra 1/8" plate to my boats bottom

Post by One Eyed Gator » Fri Nov 20, 2015 8:12 am

Add some short t bars in between the existing t bars.

I bought a light weight hull used and added and added strings in between, then added 2 jacks at the back. I fish the gulf and it works good for me.

These last few minus tides were tough on my boat. be needing poly again soon.

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Re: Adding and extra 1/8" plate to my boats bottom

Post by Afflicted » Fri Nov 20, 2015 9:02 am

I'd add t bars and see what happened

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F0zzy2
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Re: Adding and extra 1/8" plate to my boats bottom

Post by F0zzy2 » Fri Nov 20, 2015 11:49 am

It's is a 18' silver dollar big heavy barge. For a 11 year old bottom it is not in that bad of shape, it was just time for new poly. The transom was the worst but I pushed the dents out with a porta power no problem. I was just thinking a little thicker material back there might help out. I don't really have any more room for more T bar's unless i grind out the welds between the existing 7 T bar's. I think I might just leave well enough alone, install the new poly and call her good for another 10 years.
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Re: Adding and extra 1/8" plate to my boats bottom

Post by RJC5778 » Fri Nov 20, 2015 2:01 pm

could always got with a thicker poly......

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Re: Adding and extra 1/8" plate to my boats bottom

Post by One Eyed Gator » Fri Nov 20, 2015 3:20 pm

Yes I had 7 stringers and added 6 more in between the original 7 hat go 1/2 way up to the bow. Then made a jack to push on each one or pull as need.

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Re: Adding and extra 1/8" plate to my boats bottom

Post by F0zzy2 » Fri Nov 20, 2015 4:26 pm

I'll double check how much space I have between my T bar, I like your idea one Eye. I think I will add another jack plate near the rear of the boat i already have two, one mid way and another just forward of the fuel tank.
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Re: Adding and extra 1/8" plate to my boats bottom

Post by barhopper » Fri Nov 20, 2015 4:43 pm

I also have 13 t bars now. We added 2 on each out side. Already had them between the others. Hey Gator if you like - tides you'll like it next week. I'll be over there Monday, Tuesday, Wednesday, and possibly Friday. Cooler weather and extra low tides = what I like. Hopefully the fish will cooperate.

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Re: Adding and extra 1/8" plate to my boats bottom

Post by akblackdawg » Sat Nov 21, 2015 7:37 pm

Something you might ask about and consider doing that I've seen mentioned before. Take some steelflex after you straighten the bottom as best you can, and fill in and level the bottom with the steelflex, otherwise, when you add the new poly, it will still just form the same shape as the bottom with the low spots you could not straighten still uneven showing through. with the steelflex, you can shape and sand it till its as flat and smooth as new. Bud
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Re: Adding and extra 1/8" plate to my boats bottom

Post by F0zzy2 » Sun Nov 22, 2015 12:17 pm

Thanks Bud I was planning on that, any idea where I can find that in AK?
18X8 Silverdollar- 632 BBC- CH-4 2.67 ratio - 4 84" S Series Blade

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Re: Adding and extra 1/8" plate to my boats bottom

Post by akblackdawg » Sun Nov 22, 2015 7:57 pm

F0zzy2 wrote:Thanks Bud I was planning on that, any idea where I can find that in AK?
i think you will have to order it, and shipping may be a problem. Bud
:alaska: If you ain't living on the edge, you're taking up to much space.

15x8 Alumatech hull, with enclosed cab, aluminum cage, LS 3, 6.2 aluminum block ffi, 2.7 Balistic Box, sensinich superwide 3 blade. Built for year around riding in Alaska

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Re: Adding and extra 1/8" plate to my boats bottom

Post by Gary S » Mon Nov 23, 2015 6:38 am

http://www.fascoepoxies.com/

You can get it here and they ship.

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Re: Adding and extra 1/8" plate to my boats bottom

Post by One Eyed Gator » Mon Nov 23, 2015 9:10 am

Barhopper pm SENT

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F0zzy2
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Re: Adding and extra 1/8" plate to my boats bottom

Post by F0zzy2 » Mon Nov 23, 2015 3:21 pm

Thanks Gary, I called fasco this morning unfortunately they don't take credit cards. They were a great help and recommended me to use FASCO 26 EPOXY FAIRING COMPOUND to fill any voids and then use the flex steel over that to seal everything up. They also refereed me to one of there suppliers that takes a credit card and ships out of state http://fiberglasssupplydepot.com/ they was also very helpful for anyone else that might need this product shipped to them.
18X8 Silverdollar- 632 BBC- CH-4 2.67 ratio - 4 84" S Series Blade

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