CARDBOARD BOAT BUILDING 101 by United Way of Elkhat County What floats you Cadboad boat... United Way Kick Off August 28, 2015
CONSTRUCTION RULES The ENTIRE boat must be built of cadboad, duct tape, and one-pat polyuethane. Only exceptions ae the paddles & decoations Use Cadboad boxes, blocks, capet tubes NO pe-teated cadboad allowed No Sona-Tubes, waxed o teated cadboad NO wood, plastic o fibeglass NO caulking compounds o two-pat/mixed adhesives NO wapping in duct tape, plastic o fibeglass Duct tape may be used to einfoce seams
CONSTRUCTION RULES Watepoof the boat with Vanish, Paint o Polyuethane (one-pat, paint-like substance) Decoations ae encouaged -as long as they don t effect stuctual stength o buoyancy The cew compatment CANNOT be enclosed so as to intefee with escape Evey cewmembe must wea a pesonal floatation devise (PDF) and pope footwea
CONSTRUCTION Pemissible Mateials Cougated Cadboad m Appliance o gocey stoes Cadboad blocks m Funitue stoes MATERIALS Mateials NOT Allowed Wood, Styofoam Plastic sheathing Fibeglass Cadboad Tubes m Capet/linoleum stoes Fastening mateial m Duct o masking tape m Liquid nails adhesive Latex Paint, Vanish Sona-Tubes, coated cadboad Silicon, Wax, Ta Caulking compounds Metal Staples, clamps, scews Judges decide on the intepetation of the ules
CONSTRUCTION MATERIALS EXAMPLES Capet Tube (about 4 ½ dia.) CadboadBlock (2-3 thick) Cadboad Box -cut open
CARDBOARD BOAT DESIGN Conside its size -building & tanspoting m Big enough to hold cew, small enough to cay m Wide is bette, but still be able to paddle - No sufboad style designs ae allowed -Rafts ae allowed m Conside total weight of all mateials when wet m EVERYTHING must be emoved fom the pond Boat decoations and cew costumes ae encouaged -use you imagination you will be awaded fo you ceativity!
CARDBOARD BOAT PHYSICS How much will you sink? - Displacement wate boat displaced wate displaced volume of wate (V) V = L x W x H Weight of Wate = Wate Diplaced (ft 3 ) = Weight-of-boat-&people-lbs 62.4 pountds/cubic-foot 62.4lbs/ft 3- H2O Depth (ft) boat sinks EXAMPLE: Box boat, 3ft x 6ft, 1 ft tall (high) Boat volume= 3 x 6 x 1 = 18 ft 3 Boat displacement= 18 ft 3 x 62.4 lbs/ft 3 = 1123.2 lbs Which equates to 93.6 lbs pe inch of boat height
MORE CARDBOARD BOAT PHYSICS Wide is Bette - Cente of Bouyancy
EVEN MORE CARDBOARD BOAT PHYSICS Movement Though the Wate
CARDBOARD BOAT DESIGN SUGGESTIONS Set the Design Goal: Fun, Speed and Appeaance Sketch out you design m build a scale model fom manila pape: - estimate mateials o plan how to use what you have - plan out what constuction techniques will be used 1 x1 x3 box: will float 187 lbs. m if it ll hold you, it s big enough to float Flat bottom, sit-to-paddle & canoe styles -ae the best/easiest Ruddes help keep you staight but make tuning difficult and adds complexity to you design.
MORE CARDBOARD BOAT DESIGN SUGGESTIONS Long boats go fast -but ae hade to tun Shot boats (<8 ) -ae difficult to keep staight Best Length: 8-12 feet Best Height: 18 inches m allows oom to sit/kneel & still paddle ove the edge Best Width: m 18-30 (max) fo 1 peson m 48 wide fo 2 people side by side Kneeling is a powe position but sitting is moe comfotable
CONSTRUCTION TIPS & TECHNIQUES I Cove all edges of cadboad -acts like siphon Cadboad Tubes make geat fames m Cut fo joining & bending m Fasten tubes togethe Cadboad Hull m 1-2 layes, fasten & cove the seams m With 2 layes, ovelap the seams & polyuethane in between m Decoate, paint & vanish Reinfoce the aea whee you sit, kneel o stand
CONSTRUCTION TIPS & TECHNIQUES II Capente s glue and liquid nails wok well hot-melt glues will melt in the heat and sun Duct tape only non-painted sufaces (tubes o fame that will be coveed) m Duct tape shinks when painted m Duct tape should be coveed with masking tape if you need to paint it m Clea tape melts when painted m Masking tape woks well on glued edges & seams m Kaft pape with spay adhesive may also be used
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CONSTRUCTION TIPS & TECHNIQUES VII
GO BUILD YOUR BOAT WE LL SEE YOU ON THE CORPORATE POND AUGUST 28, 2015 Boats aive August 27th at United Way by NOON. If you have questions, contact: United Way of Elkhat County Jess Kosche 601 CR 17 PO Box 3048 Elkhat, IN 46516 574-295-1650 www.unitedwayec.og