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82 Nautique 1
Senior Member Joined: January-06-2007 Location: Rock Island, IL Status: Offline Points: 265 |
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Mark from US Composits suggested this "DBM 1708 Knytex Biaxial" with the Epoxy Resin to get a 1/4" thick floor with no plywood.
I am using 2 through hull fittings. 1 @ the battery box drain connected via a rubber hoes to the other at the 3/4" bulkhead where the vent tubes, cable/electric,Battery cable conduits run under the floor. I plan on glassing both sides of the bulkhead and around the conduits to prevent bilge water from getting into the foam under the forward flooring area. Dennis |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Is that carpet on the sides? You'll want to get rid of that lip now that you have the floor structure in place. You'll also want to clean up the glass under the carpet so you can roll some glass up the edges. Otherwise, looks great!
Some might I went across the street with this, but it won't have to be done again! Those are standard bulkhead fittings I 5200'ed in place. I also precut the holes to get the CPES and glass on. PVC likes exoxy if it's scuffed up where you want to glue it. The vent tubing is called 'reinforced flexible tubing'...very original! It's about halfway between wet exhaust and dryer hose. |
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82 Nautique 1
Senior Member Joined: January-06-2007 Location: Rock Island, IL Status: Offline Points: 265 |
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Here is the link to the through hull fittings I ordered
http://www.go2marine.com/product.do?no=51786F |
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82 Nautique 1
Senior Member Joined: January-06-2007 Location: Rock Island, IL Status: Offline Points: 265 |
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Yes the carpet is still on the sides. I plan on pulling off the carpet, cutting off the edge, grind and clean about 3-4 " up the sides. I read that I should extend each lift of glass up the side 1 -2 " on each lift.
Does this sound right ?? |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Yes on the 1-2" overlap per layer. Im not so certain that cutting the lip all the way off is necessary... the foam will find its way under it no problem. Id be more inclined to taper it down (from full thickness where it meets the wall to knife edge sharp) and use it as a guide for the proper floor height. If possible, I want to hard-pipe all of my under-floor hoses... my vents and conduit will be all PVC. If I can do the same with the batt box drain, I will. I figure that any connection under the floor is a potential failure point. |
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82 Nautique 1
Senior Member Joined: January-06-2007 Location: Rock Island, IL Status: Offline Points: 265 |
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Are you saying just grind or sand down the 2" to 0" and just lay the new glass over the 2" lip up the side ?
I was going to use the flexible hose, however opted to use all PVC for the vents and cable run. Menards probably hates me. I purchased about $60.00 of varouse 3" fittings... configured what I needed to run around the battery box and connect to the hard pipe extending below the front area. I used rubber couplings to connect the PVC to the existing pipes. Returned $35.00 for credit and now glad I went PVC. Not much room to run (2) 3" Pipes, (1) 4" pipe around the battery box !!!! |
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Greg every time I see those underfloor pictures of yours. I know that if I ever need to do my stringers I will get you a air ticket to Aus.
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Yes, I do believe you understand me correctly. Are your vent pipes 3" PVC? 3" Schedule 40 PVC is actually 3.5" OD, so 2.5" (2.875" OD) is actually closer to the 3" you'd want to match the dryer hose used on the intake vents (assuming its the same as my boats). Probably too late now and no big deal either way- just FYI! I think I went 4" on the conduit tube in my Tique and that worked out beautifully... much larger than the tiny one from the factory. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Thanks Lewy, Oz is high on our list of places to visit!
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Greg,
Have you taken a look at where the PVC runs through the bulkhead to the engine compartment lately? One of my concerns has always been how well the epoxy will bond to the PVC and the reason I've always liked how Roger did his with the fiberglass tubing. |
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Morfoot
Grand Poobah Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5313 |
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Pete,I'm guessing it's holding up pretty well as long as he roughed up the plastic real good where the bond is. I've repaired quite a few plastic parts here at work for guys from other shops who know nothing about composites. Success rate is 100% so far.
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"Morfoot; He can ski. He can wakeboard.He can cook chicken.He can create his own self-named beverage, & can also apparently fly. A man of many talents."72 Mustang "Kermit",88 SN Miss Scarlett, 99 SN "Sherman"
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Pete, I like Roger's FG tubes as well- but thats a lot of trouble to go through! Other than the seal at both ends, PVC is pretty ideal, I think. If using PVC, would you prefer 5200 over epoxy at the bulkhead? |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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I haven't looked that close recently but will when it warms up. I did rough up both sides with 60 grit and made a fillet on both sides with mil fiber, cabosil, and talc. I bet it's still taped together.
I did use 5200 for the bulkhead fittings. |
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abolton
Groupie Joined: September-07-2005 Location: United States Status: Offline Points: 81 |
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I have a question on the whole ventilation thing, my deck scoop has the horn mounted inside of it. How functional is that, and the deck scoop only works at speed anyway. A lot of work go's into all the PVC venting from a Deck Scoop that is not a big performer anyway.
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ABE
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Tim, That's a tough question!! I'd actually go with both. The 5200 will stick to just about anything so I'd go with it inside the bulkhead hole and a small bead on both sides. Then, go over it with the glass/epoxy like Greg and others have done. I know Roger sure went to the extreme with fabbing up his own glass tubing but glass tube and fittings are available. However, I'd say that over PVC it would cost more. |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Pete, I was scolded on my '90 when I 5200'd the bulkhead and glassed over it... I was told that 5200 would stick to glass, but not the other way around. True or false? 5200 seems the simplest and most straightforward to me... the vent tubes are a pain to glass around from all sides- especially when theyre close together on the bulkhead. |
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abolton
Groupie Joined: September-07-2005 Location: United States Status: Offline Points: 81 |
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There must be a better way to vent, this is a lot of work are there any other options?
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ABE
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Id be interested in hearing if there are any... but I doubt it. Cut a hole in the motorbox and youre going to have increased engine noise in the cockpit- plus airflow isnt as good there as its behind the windshield. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Tim,
Yes, the epoxy may not stick to the 5200 and the reason I mentioned keeping the bead small. The 5200 is more of a "back-up" seal. I agree that the tubes are a pain to glass around - any curved surface isn't easy! Stick with the 5200 and it's cool. |
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uk1979
Platinum Member Joined: June-13-2007 Location: United Kingdom Status: Offline Points: 1412 |
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May be worth a look, pipe and bends as its guttering could be less cost.
fiberglass down pipe and bends Thanks for the mention Pete. |
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Lets have a go
56 Starflite 77 SN 78 SN 80 BFN |
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abolton
Groupie Joined: September-07-2005 Location: United States Status: Offline Points: 81 |
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I would be supprized if that litte deck scoop with a dbl. horn mounted in it could capture as much air as it would take to fill all the PVC pipe being routed for venting. Not only that, but every bend and elbow is restrictive to flow. It doesn't seem to me that is effective enough to warrent all the work and cost. I would put in a couple of 3" electric blowers or fans pull the air from below deck and be done with all of it.
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ABE
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21135 |
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Remember that the engine is pulling air in as well- youre not totally reliant on the scoop to capture the air. Regardless, the air has to come from somewhere- if youre not running piping up to the front vents, where do you suggest it come from? Roger, using gutter is a cool idea! My only issue is that the datasheet says they use "polyester or vinylester resin"... I guess the vinyl would be OK, but no way Im using poly on the boat. |
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abolton
Groupie Joined: September-07-2005 Location: United States Status: Offline Points: 81 |
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I am thinking of terminating the pipe at floor hieght below deck in front of the dash but not ducting up to the scoop. It gets in the way of some usable space options, somehow I would like to clean it up a bit. All that pipe is just weird.
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ABE
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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You might want to check out the USCG regulations - I am sure there are mimimum opening sizes required at deck level. It's best to stay with CC's design - they did it for a reason! |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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82 Nautique 1
Senior Member Joined: January-06-2007 Location: Rock Island, IL Status: Offline Points: 265 |
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If you go to all the work to do the piping under the floor area, why not finish it like factory and eliminate any what if's.
I would not want to compromise the airflow into the engin area and create a safety issue. I personally know a family from Iowa that had a boat explode in Florida last year. It was determined the cause being gas vapors in the engine compartment. Why risk safety for a little storage. |
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abolton
Groupie Joined: September-07-2005 Location: United States Status: Offline Points: 81 |
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I would think USGC regulations would cover fume evacuation or proper venting for under deck fuel tanks and larger boats, but its a good point. I want good air induction to the engine for sure.
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ABE
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WakeSlayer
Grand Poobah Joined: March-15-2006 Location: United States Status: Offline Points: 2138 |
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Safety first. Vent it properly.
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Mike N
1968 Mustang |
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79TiqueRebuild
Senior Member Joined: January-21-2009 Location: Kansas City, Mo Status: Offline Points: 238 |
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I found 2 1/2 pvc fits perfect to the duct hose. The pipe I found was from a golf course they use it for irrigation sprinkler pipe. The elbows had to come from a irrigation supply company.
After working with a little epoxy and seeing how easy it is to flex out of the mixing container, I'm concerned about the bond to the pvc though. Guess next batch I mix I will try to do a little test. I like Rogers idea also of fiberglass duct the best but way beyond my level. Monty |
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skfitz
Senior Member Joined: October-15-2009 Location: Herculaneum Status: Offline Points: 138 |
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So if you go foam-free, and if you leave drain gaps at the bottom of the bulkheads and stringers, does it really matter whether the PVC/bulkhead joints are watertight? |
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