Powered by Gossamer Forum v. Skip to Content. Subscribe to most recent posts across all forums Subscribe to most recent threads across all forums Subscribe to most recent posts in this thread. Sep 22, , PM. Dave Williams. Well, I needed a Summer project, and thought I'd blow some money and attempt a foam layout for no particular reason. It started out with some scaled plans, buying the "way expensive" 2" foam from Home Depot, and cutting out the bottom pieces. Next was cutting out the plywood base.
I Thompson water sealed both sides. I then epoxied the plywood to the foam, also used 3 inch drywall screws to keep it from sliding while drying. Next was epoxying the first "waterline" top piece of foam to the bottom, then fiber glassing over the entire bottom.
After glassing the bottom, I finished epoxying the remaining top pieces in place, then filleted the inside edge with flour epoxy. I added aluminum bar stock under the top piece for support i had it on hand or would have used wood Then started shaping.
I shaped the entire boat with a 4 inch grinder with a 60 grit sanding disk, and it took not time at all, but a little messy. I then added some rounded corners in the cockpit for aesthetic purposes, and coated the entire outside with epoxy. The forward rounded corners will be shaped down to flow with the boat. I need to add some tie downs forward and aft for the anchors somehow, and then I'll paint the entire boat.
I know it won't be very tough, but I'm not planning on glassing the top of the boat for weight savings. I need to get it done so it can be tested before the water gets cold. Anyhow, the boat is 8 feet long, 4 feet wide due to the foam sheets and the cockpit is 6 feet long and 30 inches wide. My buddy and I calculated it will take about pounds to sink it down the the first top piece. More pics to come of finished boat. Andy Grant. No, but it kind of works out, as a few buddies weigh , add their gear and it should work for them, I'll just need some ballast when I'm in it.
Dave E. Sep 23, , AM. Have always thought about doing something like that for a layout. Can't wait to see the finished boat on the water. Troy Fields. Great job Dave. Can't wait to see the finished photos and hear reports of the first season. Eric Patterson. Dave Very clever. I'm impressed with the simplicity. You mentioned you were not going to glass the boat. I take it this type of foam will not absorb water? You might consider using a 2 oz cloth just to give it some durability without adding much weight.
Thanks for sharing your build. I think everyone wants to see the finished product. Chris DeRonde. The boat looks great, I would glass it with a light weight fiberglass.
Just be careful you need epoxy resin so it does not eat up the foam. Chris D. Thanks Guys I may add the 2oz cloth at a later date, since it wouldn't be a big deal even after a season, just some sanding, but for now I'm going to try just the epoxy layer without glass, then multiple coats of paint. I'm sure without the glass, I'll have plenty of dings and dents. I'll be interested to see what the final weight is, for now I can pick it up and carry it around with no real problems, the size is just awkward.
Erik, as for the foam, it is what is used for insulating foundations, and states on the foam it is water resistant to what level, I don't know , but with epoxy and paint, I'm hoping it'll be ok, we'll see. I'm painting the base coat tonight, so more pics to come!!
Extruded polystyrene is fairly water resistant as long as you don't let it sit in water for months on end. Without a very heavy layer of glass, say 10oz, you will get lots of dings and those sharp corners will be rounded over on day one.
My foamer marsh boat has 6oz and is really torn up. My one concern about the wings out past the body box is that without cloth enforcement on both sides of that joint it will pull apart with little effort. Since EXP is not a structural foam you need to build structural support into the design. You have cloth on just one side of that wing and once loaded to where the wing us holding the weight of the hunters it will fold up at the corner. Your cover piece will be split in two the first time a hunter sets his gun down roughly or tries to sit up using it as a brace.
If the hunter puts any weight on that cover while climbing in it will snap in two. That piece will need to be glassed with heavy cloth on both sides to last more than a few minutes of use. When building my foamer I experimented with a couple of different weights of cloth and decided I could risk the project to 6oz knowing that it would not last for long unless I handled the boat very carefully.
It requires wisdom to understand wisdom: the music is nothing if the audience is deaf. Last edited by: Ray : Sep 23, , AM. Thanks for the input Ray, very good info. Again this is my first attempt at foam, so very experimental on my part. I am trying to get a better understanding of your concern with the wings and how they are supported. I glassed the entire bottom over the box and out across the bottom of the wings, then filleted the joint with flour epoxy.
Water pressure will be trying to push the wings up, and therefore it would have to tear the fiberglass for the force to even see the joint where the layers were put together. Maybe I'm missing something, but like I said, that is why I want to get it done soon and try it before the water gets cold, lol.
I do undertsand the fragility of the top piece, but it is supported underneath, and again, I may have to go back and glass the top, but that will be fairly easy, just some sanding.
Just a note Sep 23, , PM. In Reply To I am trying to get a better understanding of your concern with the wings and how they are supported. Jake S.
I had thought of doing that but was conserned about strenth. I was thinking about doing the burlaping to it just like foam decoys. I don't know if that would work or not.
Phil Nowack. Fiberglass clothe is cheap Birds brought to you courtesy of Nikon, Benelli, Kodi, and Otter. Rick Henderson. Looks good Dave, id get it wet soon. If it floats like you want, wax it and pull a thin fiberglass mold off it and make some parts!!!
With all the new materials out now you can make it as light as you want. Or should i say as light as you can afford. Some of the divinacell closed cell coring is very expensive if you ask me. Well worth it if you want a light part that has the strenghth it needs to take the abuse we give our boats. Ive had good results with half inch divinacell coring. Oct 5, , PM. Well, I took the boat out last Friday while my Dad was in town. Recalculated that I needed about lbs to sink the boat down to the wings.
I had lbs in the boat with me on these pics. It didn't paddle well I don't care much about that , but floated like a dream!
Very stable. I move all around and even rocked it a bunch with no worries. Then to show the strength of the "questioned" top, i stood on it. Not that I would recommend it to anyone over my size of lbs. Somehow the guys missed a pic of me laying down, but is was comfortable and just fine. I then took it back home and slopped on some more paint, cut out the headrest so the board would lay down a little, and then painted the board.
I like the tiger stripes, but I think the overall color is a little too light for my liking, so I may start over with a darker base. For the pattern, I mimicked the wood grain in the leftover piece of plywood I had used for the headrest.
If it starts to turn as well quickclevercat. Just similar to dance, as well as gave me the paper behind of Distant Facet comics she had purchased for25 as well as planw was in glorious condition. Aluminum has scarcely all of a attributes of a undiluted vessel structure element .
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