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triple pontoon boats
i need a desighn for a cardboard kayak?
Having built a few cardboard kayaks for fun and competition years ago, I seem to remember that the rules differ from race to race. Usually they will allow nothing but cardboard so no wood stiffeners can be used. If the race is a straight line even with no turns, then you want sort of a torpedo shaped boat with a pointed bow with the boat widening out to 24-26" and then tapering back to a point This is a basic Swedeform design where the widest part of the boat is directly behind the paddler(I'm assuming you are the sole occupant). The length is up to you. I wouldn't make it much longer that 12-14' unless you have a lot of cardboard at your disposal.
My boats were open on the deck side I'd build small decks at the ends to help hold the boat together. I used a flat hull, but supported the flat hull with cardboard bracing internally. If you are near warehouses or big box stores and catch them on a day when shipments come in, they will usually give you their extra cardboard and slip sheets etc.Figuring out your seat will be critical and making a cardboard seat that will support your weight will take several layers and staggering those layers will spread the load over a wider area. You want to avoid having a stress riser where the seat quits and the hull is on it's own again for support as the boat could tear there first. also reinforce the area where your feet will be.
If you can find a grocery store that has those big cardboard bins that hold watermelons and pumpkins, most of that cardboard is triple thickness and un-stapling it will get you a 14' long piece to start with. You might need 2 or three of these bins by the time you make sides and reinforcement. I wouldn't make the sides much higher that 12 inches or you won't be able to reach over the sides and take your strokes. I've also seen some cardboard "honeycomb" walls made for stiffening loads while traveling in the trucks, but you might have to really hunt for those. Water proofing those would be tough as well.
As far as waterproofing the boat, there's the biggie. Most of the rules books prohibit using 2 part epoxies to coat he hull and insides. I used the yellow contact cement(it's waterproof) for the gluing and reinforcing the joints and edges and some say that good ol' airplane dope is the best for the hull. It's a lot more money than the contact cement and the contact cement won't let you paint pretty colors and logos and such Some use acrylic paint and some use oil based, but the bottom line is if you have to run through a few heats to get to the finals, longevity is going to be key. You may want to build 2 or 3 of them if that's the case. If the race is a "one and done", then maybe that's not as big a deal. I would test out the boat before the race and make sure it's going to hold up and make sure it's stable enough so you can finish upright!! I never had any luck using urethane varnish, even though that should've been the bomb.
A friend of min in Texas made a boat using a different technique. He ground up his cardboard and took the dust and made a slurry of it and the glue. When it all set up, he carved a very stiff boat out of it. It weathered the water nicely, but it weighed a lot more than mine. We never went head to head in competition though. He made his hull shape from plywood and then laid Visqueen over the wood and plopped the slurry down and shaped it out as best he could. the carving and grinding started after the mix had dried. I think he painted it also, but don't remember for sure.
When I lived in Arkansas, they held the unofficial World Championship cardboard boat races on Greers Ferry Lake back in 1998 or thereabouts. I finished second to a guy that had a $5000 carbon fiber bike frame mounted on a couple of cardboard pontoons and the chain drove a propeller system(the rules didn't specify that the boat had to be paddled). A ton of work went into this contraption, but I whined that his boat wasn't 100% cardboard(could you blame me?), but they let him race anyway. On a course with 2 90 degree turns on it and a distance of maybe 100 yds. total, he beat me despite a rather "ambiguous" finish line. I thought I'd crossed the line first, but se la vie. The spectators thought I won also. His propeller system hung up on one of the underwater cables that marked the course and he pretty much came to a dead stop while I blew by him. The judges said he'd crossed the finish line and that was that.
Good luck with your creation. After all, it's more about having fun that who wins I guess.
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| | 285fpb Pro Inflatable Pontoon Fishing Boat Package $899 The unique U-hull configuration of this one man fishing boat provides the maximum fishing space with the least amount of hull weight. It can be used two ways - in it's lightest configuration, without a wooden floor using the inflatable Pro Angler Seat and rowing with the included oars or fully rigged, with wooden floorboard for standing and casting, pedestal swivel seat for 360° fishing while sitting, motor mount for small gas or electric engines. Weighing only 38 lbs, with the Pro Angler Seat this is a super lightweight, super portable fishing craft. Even when equipped with floorboard, motor mount, and swivel seat this boat weighs only a total of 72 lbs. The NEW Hunter Green 285fpb is a stealthy inflatable boat that's perfect for fishing or hunting. It goes anywhere, sets up in just 5 minutes and can fit in the trunk of a car. |
| | 375fc Deluxe Inflatable Pontoon Fishing Boat Package $1449 Now available in a Dark Hunter Green to blend in with the waters and surroundings where fish hide most! The 375fc Fold Cat™ inflatable one or two man pontoon fishing boat with patented folding frame design is a lightweight, portable, fuel efficient, large platform fishing boat for two that packs easily into a car and does not require a trailer! Featuring the versatile universal Scotty™ Mount System with 2-4 Scotty™ Rod Holders and the ability to attach an incredible assortment of Scotty™ accessories. (U.S. Patent 7,240,634) |
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| | Classic 375fc Pro Angler Guide Inflatable Pontoon Fishing Boat Package $1499 SAVE UP TO $300 OFF! Lightweight, portable and a breeze to set-up, the Classic 375fc is the ultimate inflatable fishing boat! Easily carried by two persons and requiring absolutely no trailer the Classic 375fc sets up in just 5 minutes! |
| | 375fc Pro Angler Guide Inflatable Pontoon Fishing Boat Package $1799 Now available in a Dark Hunter Green to blend in with the waters and surroundings where fish hide most! The 375fc Fold Cat™ inflatable one or two man pontoon fishing boat with patented folding frame design is a lightweight, portable, fuel efficient, large platform fishing boat for two that packs easily into a car and does not require a trailer! Featuring the versatile universal Scotty™ Mount System with 2-4 Scotty™ Rod Holders and the ability to attach an incredible assortment of Scotty™ accessories. (U.S. Patent 7,240,634) |
| | Classic 285fpb Pro Inflatable Pontoon Fishing Boat Package $899 The Classic Grey Frameless Pontoon Boat is BACK! For a Limited Time Only get the 285fpbc - 2015 Model in cool grey with two Scotty® rod holders! An economical and portable one person inflatable fishing boat rated for a 3hp engine (45 lbs. max weight) or 55 lb. thrust electric motor and has a Total Max Load Capacity of 450 lbs. It fits easily in any car trunk and sets up in just 5 minutes! |
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| | Drain Valve for Transom Boats $12 Replacement drain valve for your 12.6sr or 14sr Sport Runabout. |
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| | AB285 $39 Oar Set for Frameless Fishing Boats |
| | AL Seat Cushion $9 Foam padded cushion for aluminum bench seat for transom boats. |
| | Davit Kit $459 Designed and patented by Weaver Industries, the RBD 100 is the world standard for inflatable boats. Davit kit includes all hardware to mount davits on the swim platform of your boat. Glue for Sea Eagle boats included. Call if you are using this kit on other boats. |
| | Floorboard Bag $49 This bag is made of 440 denier Nylon and features a pouch for stringers and other parts. Keeps your floorboards neat and compact. Fits floorboards for all Sport Runabout Boats and the SE8 and SE9 Motormount Boats. |
| | 124smb Start Up Inflatable Boat Package $499 The largest of Sea Eagle's motormount boats, this roomy and durable inflatable fishing platform is just a fraction of the cost of other fishing boats. The 124smb is even portable enough to pack in a car trunk. |
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| | Swivel Seat $68 This comfortable Swivel Seat can be used on many of our Sea Eagle boats. For use on Motormount boats, Sport boats, and the FoldCats the seat can be mounted on a 54 qt. cooler which will fit snugly into any of these boats. (Please note, hardware and bench are not included.) This seat can also be attached to our Seat Spider. This seat CANNOT be attached to a single bench seat (WS25, WS2505 or SPW). |
| | Whitevalve $7 Current valve for Sport Kayaks and Motormount Boats. (if your boat is 1998 or earlier, please contact us to verify this is the correct valve) |
| | Vyna Bond Glue $19 For larger repairs on our boats we suggest a 12 oz. can of Vyna Bond PVC Glue. |
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DescriptionConstructed of Aircraft grade triple anodized aluminum for years of maintenance free service. Hook is made of glass reinforced nylon and is unbreakable. Pole extends from 4' to 7' with special locking cam action. |
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DescriptionThe Sea Eagle A41 Large Bellows Pump is a high capacity foot pump made of durable ABS plastic that packs down for easy travel. Comes with triple styled nozzle for use on deluxe one-way valves |
 | Invincible Marine Bi-Color Bow Navigation Light with Small Chrome Zamak Housing |
DescriptionThe Invincible Marine BR51202 Bi-Color Bow Navigation Light will keep your boat visible and safe. With a Proprietary optical design, these bi-color lights have red and green lenses, and are housed in a die-cast triple chrome plated Zamak unit... |
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