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Jon and V Boat Conversions & Modifications
Anyone create FRP Board and Polystyrene sandwich for decking.
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<blockquote data-quote="fwman1" data-source="post: 493194" data-attributes="member: 31515"><p>I am sandwiching pink formular 150 insulation board between two sheets of FRP.</p><p></p><p>Tonight I weighed my 1' x 2' test board. The weight is 1.3 pounds per square foot. The weight is pretty good. Coosa board is 1 pound per square foot. 1/2" marine plywood is 1.6 pounds per square foot. The hoped for, but unknown attribute was the strength of the laminated board. I used Raka 900 medium resin combined with Raka 608 medium hardner. It was cured 36 hours. </p><p></p><p>I was able to support the last two inches of the test board on each end and stand on one foot in the center,(I weigh 175 lbs). There appeared to be only a very slight deflection. This was very encouraging, as a sheet that is 40" X 46" with a center support should be plenty strong enough for daily use. I am pretty certain that 1/2" plywood in these dimensions would have deflected much further and possible have broken.</p><p></p><p>[ATTACH=full]113006[/ATTACH]</p><p>[ATTACH=full]113007[/ATTACH]</p><p></p><p>At this point, the only real complication I can envision will be the actual mechanical process of performing the lamination of the main components. From my RC airplane experience I know that unless you can support the entire structure evenly, it is difficult to keep the components in 100% contact and aligned. This means that it will be a challenge to find a flat surface, a flat top plate and enough weights to ensure the even binding that is critical to the strength of the final product. I think that vacuum bagging is the right solution, but I'll have to research how to set this up and execute it for this crazy shape.</p><p></p><p>I'll do a little head scratching on the next step, but so far it looks like this home crafted composite board has promise.</p><p></p><p>FRP board at Home Depot was $41 per sheet 4X8 sheet.</p><p>Pink formular 150 insulation board was $20 per 4X8 sheet.</p><p>Raka Epoxy (1.5 Gallon kit) was $140 shipped. I used 6 ounces on the 1' X 2' test panel with some left over.</p></blockquote><p></p>
[QUOTE="fwman1, post: 493194, member: 31515"] I am sandwiching pink formular 150 insulation board between two sheets of FRP. Tonight I weighed my 1' x 2' test board. The weight is 1.3 pounds per square foot. The weight is pretty good. Coosa board is 1 pound per square foot. 1/2" marine plywood is 1.6 pounds per square foot. The hoped for, but unknown attribute was the strength of the laminated board. I used Raka 900 medium resin combined with Raka 608 medium hardner. It was cured 36 hours. I was able to support the last two inches of the test board on each end and stand on one foot in the center,(I weigh 175 lbs). There appeared to be only a very slight deflection. This was very encouraging, as a sheet that is 40" X 46" with a center support should be plenty strong enough for daily use. I am pretty certain that 1/2" plywood in these dimensions would have deflected much further and possible have broken. [ATTACH type="full" alt="IMG_20221210_172455826.jpg"]113006[/ATTACH] [ATTACH type="full" alt="IMG_20221210_172435468.jpg"]113007[/ATTACH] At this point, the only real complication I can envision will be the actual mechanical process of performing the lamination of the main components. From my RC airplane experience I know that unless you can support the entire structure evenly, it is difficult to keep the components in 100% contact and aligned. This means that it will be a challenge to find a flat surface, a flat top plate and enough weights to ensure the even binding that is critical to the strength of the final product. I think that vacuum bagging is the right solution, but I'll have to research how to set this up and execute it for this crazy shape. I'll do a little head scratching on the next step, but so far it looks like this home crafted composite board has promise. FRP board at Home Depot was $41 per sheet 4X8 sheet. Pink formular 150 insulation board was $20 per 4X8 sheet. Raka Epoxy (1.5 Gallon kit) was $140 shipped. I used 6 ounces on the 1' X 2' test panel with some left over. [/QUOTE]
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Jon and V Boat Conversions & Modifications
Anyone create FRP Board and Polystyrene sandwich for decking.
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