Location: Western Massachusetts Design for a Cardboard Boat Race Hi All! A sit-on kayak or surfboard style design made up of multiple laminations of cardboard with the center portion cut out of the upper layers to make a seating area for use with a kayak paddle. As creativity and style may also help determine the winner, any crazy (yet doable) ideas out there? 4'x8' sheets of double corregated cardboard are typically available at cardboard supply houses.
I know 4'x12' sheets of heavier construction double corregated are available, but must be ordered ahead of time, atleast around where I live.
I (and it's only my person feelings) think this looks like the best little single-sheet boat around. Guest625101138 Previous Member   If you want to go fast the best boat will be long and slender. I would look at a central cylinder about 8ft long and 1ft in diameter with cones of similar length to form the bow and stern. The overall underwater form would not be a lot different to a rowing scull and it should go reasonably well. Location: Western Massachusetts Thanks to all for your well-informed replies. How would you fashion the conical ends to keep them watertight and how would I gain access to the inside of the main tube to fasten the ends to it? I like the idea of the outriggers for stability but how far apart would they need to be to allow clearance for the paddle?
If the cardboard wants to crease then place gentle longitudinal creases at about 2" spacing rather than letting it crease uncontrollably. It really is better to make say a 4ft model out of light cardboard to understand the detail.
THis boat will be fully sealed internally so should not get wet inside until the outside gives up.
Just because it is cardboard does not mean it cannot be well made and perform as good as a paddled rowing scull.

Guest625101138 Previous Member   The seat will ned to be away from the cross-brace to allow full strokes. Guest625101138 Previous Member   The attached shows a cylinder and cone hull made from aluminium.
A tail and dorsal fin behind the paddler might complete the picture as riding a menacing looking shark. It would be handy to know if there are other people interested in taking the event seriously. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals.
Location: USA We recently had a cardboard boat race here - main difference was each boat needed at least two occupants. Location: Western Massachusetts The race sponsors only say that the race will be out to, around the buoy and back, no idea what distance.
Seems a good ploy would be to hide a high-performance hull under a bit of goofy-artsy decoration. All my designs use readily available tools and materials and standard size sheets of corrugated paper cardboard.
The Cardboard Boat Book is step-by-step instruction manual that teaches you how to build a small kayak style boat with recyclable resources using readily available tools and materials and standard size sheets of corrugated paper cardboard. Location: Beaufort, SC and H'ville, NC I have a standing team that convenes each Feb for the cardboard race in Key Largo Fl. The edges of the laminated cardboard could be sealed using white glue (exterior if possible) covered by a wide strip of suitable tape (what kind would be best?). I guess my original idea was bad in that it would have several long edges of the cardboard (although taped) below the waterline. So I would sit atop the central tube facing forward with my feet held above the water in rope stirrups?
It will be better to form the cylinder in its preferred direction of folding but with the cones you will have to work a little across the corrugations. Rick, could you do a quick sketch to demonstrate the relationship of the parts with the tabs?

If you can find a plant or importer near you, you might get a donation of a few large panels. The boats simply fold up from cardboard obtaining their strength from the geometry of the component parts.
I thought of using the kayak paddle as it on hand and I thought it would be simpler than trying to fabricate oarlocks that would be sturdy enough to last. One of my main concerns would be how to fasten it together; staples wouldn't be much good unless I had access to the back side to clench them. I wish I would have heard about it much sooner, the limited time frame will definitely affect what I do. They are 8-feet long, weigh about 25-pounds, and can accommodate a 250-pound person without risking structural damage. But in order to win the overall prize I need to get creative with the above waterline shape and graphics.
Each boat is constructed with 21 pieces of cardboard that are used to make 7 component parts. So this series of bulkheads make up a frame that has folded gluing tabs to bond to the skin. Tomorrow I will look for cardboard and contact ROCK 102 and the local Miller Distributor for decals or stickers.
The 7 parts are assembled together with ?environmentally-friendly? contact cement and paper drywall tape.
Once assembled the boats are sealed with an ?environmentally-friendly? water-based waterproof coating.

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