If you can vaccume bag this or press it after you have worked in the resin the laminate will be thinner. Unis are best used as reinforcing caps (one direction) on tophat stiffeners where the stress is either tensile or compression. I thought it may help you get the unidirectional in your beams with limited mould necessary. As far as epoxy versus vinyl ester, I am more familiar with epoxy (high temperature prepreg).
Originally Posted by spank You shouldn't need Chopped matt if you're using epoxy for the resin The epoxy resin or other type of resin has nothing to do with the biax. Originally Posted by nero The reason it is less expensive is EPON is the manufacture of it's resin.
Mat Forget mat with epoxy; if it's not specially treated specifically for epoxy it won't wet out.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Location: The Netherlands For bonding (ply)wood to polyester, grind down the gelcoat of the polyester, and glue with epoxy glue. Before you glue the wood to the polyester, coat it several times with epoxy resin, then paint with 2K PU paint.
Tremblay 228 » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Search this Thread Advanced Search Similar Threads Thread Thread Starter Forum Replies Last Post fiberglass boat building?
Teleflex SeaStar steering » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Search this Thread Advanced Search Similar Threads Thread Thread Starter Forum Replies Last Post Fiberglass Cloth or Fiberglass Mat? Location: white bear lake, Mn i dont know how to add another pic but i can make a new thread and post more if you guys dont get where the motor mounts on. Location: Eustis, FL It would appear your transom needs a new core, but you need to perform a simple test.
Location: Eustis, FL I was trying to be nice Fanie, these are his first posts. If the transom shows signs of puckers, bulges or softness when lifting the motor, don't bother with the holes, you need a new transom core.
If still not sure, then drill one hole about an inch above the transom drain and check to see if the core is punky, wet and soft.
It's possible you could find a dry spot above the drain hole from drilling just a single hole, but it would be fairly rare.

You're going to start this fiberglassing thing and you're going to get full of glass, you're going to itch, start scratching, sweat, swear and carry the stuff into the house in your clothes.
It's something in fiberglass that when it comes into contact with men they get addicted to the bloody stuff.
Location: Eustis, FL There are a few different approaches you can take to repairing a transom.
Your boat is too old to have a full liner, so a pour in transom, which will eventually get suggested, will not work, without a fair amount of additional structural 'glass work (building a complete inner skin, that is well tabbed into the hull shell, with sufficient thickness to participate in a sandwich laminate). This leaves you with core replacement of plywood (what's already there) or other material (foam, honeycomb, etc.). My usual recommendation is plywood and quite simply because it's easy to find, easy to work with, easy to understand and less costly then other methods. Boat Mods must keep it light » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Search this Thread Advanced Search Similar Threads Thread Thread Starter Forum Replies Last Post Mixing aluminum and fiberglass on a bass boat?
Location: Lakeland Fl USA Stodgy old dude that I am, I never understood why a pontoon boat needs to go fast. Value in the mind of the customer is how much it costs him to cruise to where he wants to go.
I have always thought that there was a market for a better, more efficient pontoon boat, and if you can produce your hull for somewhere near the price of the aluminum tube ones, you should be able to sell it.
Location: Ontario Not sure about Florida, but there's definitely a market for a faster pontoon boat up in Ontario cottage country.
Location: fl Thanks Matt Our boat will handle 1-3' pretty well,one of our good customers just took his boat from Sarasota to key west,he ran the coast to naples and refueled and shoot across fl bay,it was a 32X 10 tritoon with a 225 merc,he said he cruised at 32 mph,said he was out to the light house every day diving ,he's planning another trip to key west with a trip from key west to fort jefferson in tortougas! If you are laying up several layer, lay uni in a +45, -45 degree angle or 0, 90 angle.Fibers dont have strength when it is pulled in a 90 degree direction of the fibers. The properties are further enhanced because at the top of the hat, it is farthest away from the neutral axis. Remember to interspace biax with a thin layer of chopped strand mat to promote adhesion between layers and prevent voids. Others prefer woven fabrics but lay up a thin strip of mat on the edges to prevent the edges from curling up. I used exterior grade 9mm plywood resin coated on the bottom and glasses with polyester resin and choped strand mat on the top with a 4in overlay onto the sides the under supports are pine decking that was laying around the shop. You'll know punky when your finger hits it and it doesn't feel good, considering the core is supposed to be rock hard.

Some, you cut the outside skin, others the inside skin, but all include exposing the core, so you can hack the rotted mess out of there. The original plywood core lasted 30 years, so you'll get at least another 30 out of it, which isn't bad. Loosely woven fabrics drape well on compound surfaces but you will have problem on flat surfaces as it tends to pucker up.
It's not hard to pull an engine, just disconnect the cables, wires and stuff then using a engine hoist (preferred) or a come-a-long attached to a handy tree branch, snatch it right off the transom. If you have had some leaking into the core from anywhere, motor mount holes, leaking cap, shot bedding, etc., the moisture will eventually drain to the bottom of the transom and this is where the core will remain soaked, rotting and spoiling your weekend plans.
I have not yet checked if the transom gives at all once i move the motor because we just got a ton of snow. If you use better materials and technique then the manufacture (which is pretty easy to do with modern resins) then it'll last longer.
It is pleasing to learn that you are building these boats with a design concept different from the woefully inefficient round aluminum tubes. I just recently bought a boat but i did not relize that the back of the boat is cracked on the left side where the motor mounts right next to the transom. If the inside of the hole is wet, soft and gooey, then it's very likely your transom is shot and its core needs to be replaced. It's definitely more expensive but is it really since you'll need less of it and you're already using epoxy? But the boat i bought for fishing, its a bass boat so it sits really close to the water so i belive that part is pretty much underwater. I like it alot and i got a really good deal on the boat all i need is to fix the 120 horse i got on her to get her going for opener this spring.
I just need to know if thats bad?, if its a hard fix?, if youd have a ball park range on how much it would get fixed by somone, if my motor is going to fall off if i gun it across the lake, and also if i could do it myself if its bad, well if you guys think its bad or not?

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