Foam vs. No foam
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: Common Questions
Forum Discription: Visit here first for common questions regarding your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=23522
Printed Date: October-31-2024 at 9:22pm
Topic: Foam vs. No foam
Posted By: Jwbolton
Subject: Foam vs. No foam
Date Posted: September-15-2011 at 2:16pm
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I was wondering what are the disadvantages of taking the foam out of the hull. And do you put anything in the cavities in place of the foam? ------------- '72 Mustang |
Replies:
Posted By: Hollywood
Date Posted: September-15-2011 at 2:49pm
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There have been a handful of discussions on this already. Have you tried using the search function? ------------- |
Posted By: Jwbolton
Date Posted: September-15-2011 at 7:45pm
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Searched some more and found what i was looking for. ------------- '72 Mustang |
Posted By: Hollywood
Date Posted: September-15-2011 at 7:54pm
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Cool. A domain restricted Google search can sometimes be handy.
Foam won right? ------------- |
Posted By: KRoundy
Date Posted: September-15-2011 at 9:17pm
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What weight foam are you going to use? 2 lbs? 4 lbs? ------------- Previous: 1993 Electric Blue/Charcoal Ski Nautique Current: 2016 Ski Nautique 200 Open Bow |
Posted By: Jwbolton
Date Posted: September-16-2011 at 12:29pm
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I definately like the idea of refoaming from the stand point of it came that way from the factory. And I also like the idea of pool noodles. Have not made a decision yet on what i'm going to use. ------------- '72 Mustang |
Posted By: charger496
Date Posted: September-16-2011 at 12:56pm
| +1 for pool noodles! They don't hold water, they each will float a 200lb person while he drinks his beer in comfort, and in the hull of a boat, they last a REALLY long time with no signs of breakdown. Mine have been fine under the floor of my boat for almost SIX whole months! And counting! |
Posted By: TRBenj
Date Posted: September-16-2011 at 1:05pm
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I think its a given that if you choose not to refoam, then the structural rigidity that the foam provides (hull-foam-floor sandwich) should be replaced with something else. Most choose to glass in horizontal ribs. ------------- |
Posted By: JoeinNY
Date Posted: September-16-2011 at 1:10pm
I would say it is a given in a 82+ SN, it is my choice but debateable in 70s hulls of all type.. but you get into the first gen fiberglass hulls where some where not foamed to begin with and well.. given would be a strong word. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
TRBenj wrote:Posted By: DrCC
Date Posted: September-16-2011 at 1:21pm
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I just think it would be funny to see the look on a prospective buyers face when you guys tell them:
"Oh yea, the hull is chuck full of pool noodles." |
Posted By: TRBenj
Date Posted: September-16-2011 at 1:45pm
Fair enough... at least the 1st gen (60's) hulls have been proven to be fine without the foam (and no additional support). Not sure we can say the same about the 70's hulls, as foam was standard by then. I guess I would strip the boat in question down to the bare hull and see how much it flexes under load before deciding that supports were unnecessary. ------------- |
Posted By: 8122pbrainard
Date Posted: September-16-2011 at 1:54pm
I agree and have a tendency to say the 70's hulls can take it without exra support. Regarding the pool noodles, I'll use one of Tims favorite terms: they are just too "fugly"!! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: BuffaloBFN
Date Posted: September-16-2011 at 3:04pm
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It's not 'fugly'? ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: 8122pbrainard
Date Posted: September-16-2011 at 3:07pm
You are correct! I wish I had some typing skills!! I did edit the post!!  ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Jwbolton
Date Posted: September-16-2011 at 3:26pm
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If i end up using pool noodles, I will be putting in some ribs just for a little extra support for the floor. ------------- '72 Mustang |
Posted By: KRoundy
Date Posted: September-16-2011 at 8:51pm
Hahahah....  ------------- Previous: 1993 Electric Blue/Charcoal Ski Nautique Current: 2016 Ski Nautique 200 Open Bow |
Posted By: charger496
Date Posted: September-17-2011 at 1:23am
| As much time and money as I have in this boat, selling it will NEEEEVER be an option! |
Posted By: Nevergrew
Date Posted: September-17-2011 at 8:25pm
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From what I've read here since owning a SN, I reckon the foam causes more issues than what it's worth. I totally understand why it's there - positive flotation, structural integrity, sound absorption etc etc, but you only need a light nick in the floor skin and the thing starts filling up with water, with no where to escape.
I don't think there's ever been a 70's 80's or 90's hull manufactured in Oz that had foam under the floor - Lewy may correct me on that one though. Most hulls have 3 bungs on the transom, a centre for the bilge and two outers to drain the underfloors, if any water was to enter. Some wake boarding guys with older boats have rebuilt the floors to hold ballast water using a gel coating inside. I reckon if I ever need to redo the floors on mine I'd go no foam. That's my 2 cents anyway 
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Posted By: peter1234
Date Posted: September-19-2011 at 11:08am
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i used pool noodles . i see particles once in a while so i assume either they break down in time or mice get in during the winter . ------------- former skylark owner now a formula but I cant let this place go |
Posted By: 8122pbrainard
Date Posted: September-19-2011 at 11:49am
Dried coyote urine in old nylons works wonders. Available at Ace. Some also use drier anti static sheets too. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: GottaSki
Date Posted: September-19-2011 at 12:48pm
Clinch the sale, imo ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: peter1234
Date Posted: September-19-2011 at 4:30pm
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thanks pete yes i use drier sheets now in all the cars and the boat seems to work well . i have had a hard time getting the coyotes to go on my wifes nylons they seem to want to do something else to her leg.... yes she has nice legs ------------- former skylark owner now a formula but I cant let this place go |
Posted By: MIskier
Date Posted: September-20-2011 at 1:11am
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There are some definite trade offs to be considered when re foaming a boat.
1) It does serve as to add some structural integrity to the boat, but these boats are overbuilt for the types of hull loads that they encounter. 2) Does help quiet the boat down while underway. 3) Most importantly is the added buoyancy that it gives the hull. When originally designed these boats had to be able to pass a level flotation test. Without the foam in the hull if there is a catastrophic breach of the hull your boat will not be able to survive fully swamped. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: BuffaloBFN
Date Posted: September-20-2011 at 1:36am
Lemme just say 
Is there a year range or cut-off point for the second part of # 1? ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: BuffaloBFN
Date Posted: September-20-2011 at 1:37am
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FWIW-That topic has been beaten long past when the horse looked like a horse around here. ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: MIskier
Date Posted: September-20-2011 at 1:53am
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Not really the boats have been built lighter over the years, but never to the point that hull loads would become an issue unless you enjoy regularly parking your boat on rock piles. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: BuffaloBFN
Date Posted: September-20-2011 at 2:01am
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You're talking CC's or boats in general? ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: MIskier
Date Posted: September-20-2011 at 2:04am
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Correct Crafts, there are plenty of production boats out there that have had little structural calcs done on them. MC and CC though are way over built if you ever look at a lam schedule for one of them. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: BuffaloBFN
Date Posted: September-20-2011 at 2:12am
I'd luv to see the lam schedule for an 88 BFN. How does one get that info? And don't say 'Ancient Chinese secret'.  ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: MIskier
Date Posted: September-20-2011 at 2:15am
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That is not something that you will be able to get a hold of, but if you pull out a thru-hull fitting you can see your hull thickness. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: 8122pbrainard
Date Posted: September-20-2011 at 9:43am
What's the big problem with getting the layup? Maybe with a MC since they don't want people to know just how thin their hulls are???!!
Greg, all that's needed is to call Dave. BTW, pulling a thru-hull to see the lay up isn't the greatest idea. Decent boat builders will build up the area with a couple more layers of glass. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Riley
Date Posted: September-20-2011 at 11:00am
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Pete, the MC salesman at the Boston show showed me a cut out from the bottom of a hull and it was about 3/4" or maybe even an inch thick. Course, as you note, maybe they build them up around their through hulls and that's not a good representation of how thick their hulls are, although that's the claim he was making. ------------- |
Posted By: TRBenj
Date Posted: September-20-2011 at 11:32am
Ha, it sounds like that salesman was... a salesman.
Ive dissected a few CC's and the hull thickness can approach 1/2" or more in a few places- namely the keel, or around certain through hull hardware. Most areas of the hull are much thinner- between 1/8" and 1/4", generally speaking. ------------- |
Posted By: GottaSki
Date Posted: September-20-2011 at 11:52am
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Some guys prefer heavy hotties with lots of floatation, what can you do? But they do tend to retain water. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: MIskier
Date Posted: September-20-2011 at 12:15pm
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On a 20+ year old boat?! I highly doubt that got saved during the move.
Haha very funny you're all so original with your MC bashing. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: Hollywood
Date Posted: September-20-2011 at 12:24pm
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Nobody bashed MC. ------------- |
Posted By: Riley
Date Posted: September-20-2011 at 12:25pm
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Bashing is part of competition. The salesman I refer to was actualy a sales rep from Mastercraft and our conversation started out with him telling me how Malibu and Nautique were poor quality boats compared to a Mastercraft, he was bashing. When I told him I owned a fairly new Malibu, he backed off, but I told him he wasn't hurting my feelings and I wanted him to show me why he thought his boats were better. He went on for a half hour. I was impressed with the thick plug he showed me and I asked him if maybe due to all that weight from the thickness of the hull was the reason why the Pro Stars are so slow out of the hole and at top end. He actually told me they were designed to be slow as ski boats don't need to be fast. Tim, I think that was the Sunday after the Saturday that you guys were eating Cheezits in his boats.
Anyone ever try putting a match to a pool noodle? |
Posted By: MIskier
Date Posted: September-20-2011 at 12:34pm
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BTW, pulling a thru-hull to see the lay up isn't the greatest idea. Decent boat builders will build up the area with a couple more layers of glass. [/QUOTE]
Yes that is correct, but it does give a fair idea of what the hull thickness is on a given boat. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: JoeinNY
Date Posted: September-20-2011 at 12:40pm
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Agreed, thicken your skin that was just good old fashioned salesman bashing!
The layup in the non foamed areas of my 83 was thicker than in the originally foamed areas This likely had more to do with the proximity to keel, larger span between stringers, relative flatness of the area in question, etc. than the simple fact that the area wasn’t foamed but nonetheless the bilge where I cut through for the paddle wheel was 3x thicker than the area forward between the stringers that I cut through due to carelessness. I dont disagree that the layup on a skiboat is in general considerably more substancial than is required by the loading seen on the hull during normal use.. however I tend to not discount the abnoral situations very quickly. I am not sure that I wouldnt possibly see a rock, log, or worse at some point (hopefully not at speed but it can't be ruled out). Even a broken or poorly designed trailer or hoist bunk can provide significantly larger point loading than a boat sees in normal use. My position remains that you dont need no rottin, stinkin foam.. but if you simply remove it and dont give any thought to replaceing the benefits it supplies you may (although likely not on most of these boats) someday regret it.. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: MIskier
Date Posted: September-20-2011 at 12:41pm
MC dealers and reps do seem to like to do that, and it is off putting to me as well. All of the dealers do it and it varies from sales person to sales person. It has gotten worse as they have added more models and attracted well healed wally's who don't know one brand from the other. Believe me it makes my skin crawl when I read a post about one of these brands and why they are better than another, and the comment is made by a guy whom you know has the dealer do everything to the boat. ------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: MIskier
Date Posted: September-20-2011 at 12:57pm
3X thicker at the keel  Every boat that I have dealt with as far as the lamination is concerned has never varied that much in such a short span. Generally it has varied by several layers, never multiples of the hull thickness.------------- 2006 MasterCraft PS 190 1986 CC Ski Nautique 2001 |
Posted By: mountaineerminer
Date Posted: September-30-2011 at 2:58am
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I will hate myself for getting involved in this...
The epic battle between foam and no foam; How does one test hull rigidity as an affect of foam content? Seat of the pants? Can you feel the hull flex at 25 knots or do you just feel the waves beat the hell out of you? I am going on the assumption that the foam does make a difference to ride quality; why wouldent it. Properly installed foam should dampen the impact of the water felt by passengers. Also, in theory it seems filling the void between stringers would increase stiffness. And third, it will help a boat full of water float better. I also dont like the negative of expanding foam, water retention.... Well, I havent settled anything; but I did ramble on about my opinion on foam, and everyone knows what opinons are like. Mike |
Posted By: 8122pbrainard
Date Posted: September-30-2011 at 9:39am
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Mike,
Don't worry about hating yourself for commenting as this subject has come up many times with many opinions and yes "seat of the pants" engineering!! I feel the era (year) of the boat hull makes a big difference. Early glass hulls were thicker and certainly did not need the foam. Then, as years past, hulls were made thinner and the added rigidity of the foam was "engineered" into the hull strength. One thing to keep in mind is old wet foam does not provide any support and to this day, I've never seen a hull fail do to the lack of the added strength of foam. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: peter1234
Date Posted: September-30-2011 at 11:10am
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as far as floatation goes I wonder if air bladders under the floor with easy access pressure monitoring would ease the sinking feeling of having no foam ------------- former skylark owner now a formula but I cant let this place go |
Posted By: TRBenj
Date Posted: September-30-2011 at 11:47am
I gotta disagree with you here, Pete. Soaked or not, foam does lend structural rigidity between the hull and floor. You and I both know that there are many boats running around with rotten stringers, yet somehow they still hold together. Im not sure that would be the case if the only thing holding the boat together were rotten stringers (no foam to keep everything moving together). I dont know about you, but I dont know of any boats that have had their foam removed, then sealed back up with rotten stringers. That seems like a recipe for disaster. A foamless boat (whether the stringers are old or new) is not likely to fail, as the stringers are not likely to be rotten in the first place... so thats not what Im referring to. Like you, Im a no-foam guy because I hate holding water in the structure. I like the fact that foamless structures can drain and breathe- so they should be much less prone to rot. What Im saying above is that if rotten stringers are a foregone conclusion, Id much rather have foam down there holding everything together rather than rotten stringers alone. ------------- |
Posted By: mdvalant
Date Posted: September-30-2011 at 2:02pm
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Our Hydrodyne has rotten stringers and no foam. I think the top shell is the only thing holding it together. But it does look nice! ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=5009 - '90 Ski (sold) http://www.correctcraftfan.com/diaries/details.asp?ID=5479 - '00 Sport Mississippi River - Bellevue, IA |
Posted By: 8122pbrainard
Date Posted: September-30-2011 at 10:09pm
Tim, There are times that you are as ADD as I am!! Please note that in my post, I never mentioned stringer issues. It was simply hull thickness and foam adding to the rigidity of the hull!!------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: GottaSki
Date Posted: October-01-2011 at 12:38pm
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When I took my supreme apart, they are not foam filled.
There is a big glob high in the bow, some rigid foam strips just tacked to the inner gunnels, and two strips, like 4x4s under the floor, tacked with glass to the hull. The boat met level flotation standards that way. I have no need for a boat to remain operable after chainsawing a chunk out like a whaleboat or ranger. Its basically rigid pool noodles with glass straps. I added some pool noodles under the floor after removing some foam from the bow for more storage. Now a 70s-80s nautique has glass about twice as thick everywhere. Before foam I believe they are multiple times more rigid than other boats that still perform after 30-40 years . So how rigid is enough? The concept that a nautique is not rigid enough without foam filling is just absurd to me. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Luchog
Date Posted: October-01-2011 at 5:42pm
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What keeps the boat in shape is the floor/stringer/hull combo, I dont know why foam is being thrown in the structural discussion.
if you had to build a boat Would you cheap on the floors? Would you cheap on the stringers? would you cheap on the hull? would you foam or not foam? This is the only debatable issue, because i'ts not fundamental to boat building structure. And hulls are ticker on the keel because that's where all the unattached resin ends while laminating!!! Hulls dont need to be rigid, just on certain points, too rigid cracks, some flex points are even good for the structure. And I suggest checking on the newer CCs before talking on other brands lamination, as they have gotten thinner lately. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: BuffaloBFN
Date Posted: October-02-2011 at 12:01pm
I gotta go with Tim on this one. I could stand on a chunk of wet foam out of my boat and it didn't give. Also Coast Guard regs? ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: Luchog
Date Posted: October-02-2011 at 12:35pm
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Greg, my point is from a structural standpoint, the foams add little or nothing, you could fill it with concrete, but it's still unneeded.
How many boats are running no foam and no catastrophic failure occurrs? As Miskier stated these boats are way overdone on structure, specially the old ones, the stringer we are used too see are unthinkable on most other boats. Yes, there's the CG regs and the sound dampening, but that's a whole different matter. probably a composite hull without any foam would sound very shallow on the chop. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: Gary S
Date Posted: October-02-2011 at 12:47pm
Here's my Dads now primary Florida boat,a '69 Herters.No foam, just bench seats in the shape of an upside down U that also provide flotation. Since you walk right on the bottom,you can see it flex, so much so that it was scarry at first.No cracks in the gel after all these years
 ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: harddock
Date Posted: October-03-2011 at 10:25am
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Anyone ever think of using 2 litre soda bottles? They would last forever, provide flotation, and not hold water if capped. They offer no structural support but noodles can't be much better.
As for the bashing. If it comes from a salesman, it might as well come out of a politition. The crap the reps feed you about how good your product is versus how bad the other guys stuff is usually about 99% bull. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=4487" rel="nofollow - 1998 Ski Nautique |
Posted By: KRoundy
Date Posted: October-07-2011 at 12:27pm
Gary, I LOVE that old Merc. Nice shot!  ------------- Previous: 1993 Electric Blue/Charcoal Ski Nautique Current: 2016 Ski Nautique 200 Open Bow |
Posted By: Luchog
Date Posted: October-07-2011 at 12:56pm
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I have an 80hp Mercury with the blue stripe on my dad's 1978 16' boat. Awesome motor. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: bbishop1974
Date Posted: October-07-2011 at 10:13pm
| last night i went down to check on my boat,nice moon lit night,having a frosty adult beverage when i notice something in the water by my neighbors dock.i thought she might have put in her sunfish sailboat.as iam leaving i walk over and notice its the cover to her 18ft stingray in the water.so much for USCG flotation,cover was still on the boat and the boat was at the bottom of the lake.i believe foams only purpose would be as a sound deadner. |
Posted By: Gary S
Date Posted: October-07-2011 at 11:55pm
 Unfortunately Kevin that old '64 is history.Last winter it started to have starting issues.You have to pull the powerhead to remove the starter.Dad being in his mid 80's just can't work on them anymore or use the pullstart if need be so he took it in and was advised that it was not worth it.That and the fact it was in Florida saltwater now,the wiring was going too.Before I could get it back he had got rid of it.So this spring he found a low hour '03 Mercury 25 up here and he's going to ship it down.------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: BuffaloBFN
Date Posted: October-10-2011 at 1:35pm
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http://www.foxnews.com/us/2011/10/09/7-treading-water-for-20-hours-rescued-off-florida-keys/ - had drifted 4 miles from the boat that capsized and sank
It's a recent story so we'll see if they show or mention the boat. Just saying... Edit-22' Wellcraft Ctr Con ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: john b
Date Posted: November-08-2011 at 3:06am
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I restored a Glastron Skiflite a few years back (I still don't know why) . The hull was in nice shape, but the floor and stringers were mud. The PO had screwed a sheet of treated 3/4" plywood to the rotten floor with drywall screws that were a little too long. When I removed all the material from this quality repair I found that he had stuffed pool noodles under the floor through some holes he made before he screwed the plywood on top of the rotten floor. The pool noodles were saturated and almost as heavy as concrete. They broke apart under their own weight when handling them. I left a big piece of one out all summer to see what would happen. It only lost a little weight. ------------- 1970 Mustang "Theseus' paradox" If everyone else is doing it, you're too late! |
Posted By: charger496
Date Posted: November-08-2011 at 1:22pm
| I'm sure pool noodle technology has come a long way recently, what with the advent of....hell, they better be better now. They's in ma boat! |
Posted By: GottaSki
Date Posted: November-08-2011 at 1:45pm
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I don't think one can conclude anything other then if you keep your boat chronically soaked, bad sh|t happens. ponderous.
My noodles are doing just fine since '97. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: kapla
Date Posted: November-08-2011 at 2:15pm
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My boat capsized once and then when they turn it over it kept afloat with the water to the gunnel level..using a HD water pump that the local CG had aboard they were able to dump all the water and finally towed the boat to the marina....foam I guess saved it from going to the bottom...7 years later due to this accident I had to redo my floors. Should had know the wood thing, I probalbly I would have claimed the insurance the floor repair!! LOL
------------- <a href="">1992 ski nautique |
Posted By: charger496
Date Posted: November-08-2011 at 6:09pm
| Damn, Kapla! With all the prop repairs, capsizing your boat, and having to wipe sunscreen off your seats from all the pretty ladies, it's amazing you have any time to ski! |
Posted By: Hollywood
Date Posted: November-08-2011 at 6:18pm
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Not to mention cruising in the Vette, BBQs and a handful of Holidays. Busy man! ------------- |
Posted By: skutsch
Date Posted: November-09-2011 at 9:10pm
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Seb - I wanna hear the story on how the boat capsized!!! ------------- Our http://www.correctcraftfan.com/diaries/details.asp?ID=4669" rel="nofollow - 98 Sport Nautique My Dad's 63 Ski N |
Posted By: Swatkinz
Date Posted: November-09-2011 at 11:31pm
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Agree with the above posters, Seb. You are hell on a boat. What's the story with the capsizing? ------------- Steve 2011 Sport/Air 200 Excalibur 343 2017 Boatmate Tandem Axle Trailer Former CC owner (77, 80, 95, 88, all SNs) Former Malibu owner (07, 09) |
Posted By: eric lavine
Date Posted: November-24-2011 at 2:07pm
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one would think a 46 foot cougar that does 100 mph hitting 8 ft waves, with 10,000 lbs of engines in the ass end would snap in half, the hull averaged 3/16 across the structure, thin enough to see light thru it. 46 feet long, 8 ft beam, looking out the bow you could see the flex under way, not a drop of foam. normal single stringer design with secondaries...were talking 8 straight hours of brute punishment, to this day i have not seen a boat snap in half.
I look at these cast iron bath tubs (CC's) 19 foot long, built like a tank, if its lucky hitting someones wake is the biggest wave it will ever see in its life. just comparing apples to apples, I really could see the foam effecting more of the structure in a negative way, glass is designed to flex as proven many times when you put a boat in the water.... in the grand scheme if that 46' footer was foamed i believe it would snap in half because you are eliminamiting the flex, alot of you guy's are engineers, and should possibly see this? imagine if you had a rigid air plane wing, you look out that window and see it bobbin up and down, it bobs for a reason, so it doesnt snap off the side of the plane kinda the same theory in a car possibly, you hit a wall in a 68 duece and a qauter your gonna die because of ridgity, now you take a tin can kia with crush zones the car will absorb the sudden stop. so maybe its a double edged sword, flex is definitely considered in a boats design ------------- "the things you own will start to own you" |
Posted By: SNobsessed
Date Posted: November-24-2011 at 3:01pm
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Eric - I agree 100%. If you have a beam design that changes modulus suddenly, that is where the stress concentrates & it will crack there. Hence tapered wall thicknesses & large fillet radii in molded parts. Welds are a good example of a doomed design because they stop suddenly.
Very few structures have infinite life (at max cyclic load). For some reason these factors are not published in the sales brochures. So either avoid epic loading conditions, or don't have the expectation that it will never fail. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: eric lavine
Date Posted: November-24-2011 at 4:38pm
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your right snob, i just got a plow back from last year which I welded all the gussets where they should be, the plow shouldve been taken out of service 3 years ago, after every gusset there is a crack,
exactly snob your spot on, you re-distribute the weight exactly as you would on a trailer, you must understand hydro theory, when in the water you are redistributing weight and it is equal in the water, its hydraulic theory ------------- "the things you own will start to own you" |