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Jon and V Boat Conversions & Modifications
Cavman138's PolarKraft 1648
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<blockquote data-quote="Rat" data-source="post: 125055" data-attributes="member: 1914"><p>Yes, you should add foam to make it unsinkable as well as achieve upright and level flotation according to USCG rags. </p><p></p><p>The formula: </p><p>Vessel weight / 60 = Cubic feet of foam</p><p></p><p>The foam weighs 2 pounds per cubic foot, water weighs 62 pounds per cubic foot, so the foam gives you 60 pounds of flotation for every cubic foot. So if your vessel weighs 200 pounds you will need 3.3 cubic feet of foam or, a one gallon kit. </p><p></p><p>200 / 60 = 3.3</p><p></p><p>The specs I quoted (60 pounds of buoyancy) are for Hi-Bond foam, which is what I use, your foam may be different. </p><p></p><p>Also, your plywood will give you some buoyancy as well, find the specs online to calculate your ply buoyancy and then subtract that from the overall amount of foam needed.</p></blockquote><p></p>
[QUOTE="Rat, post: 125055, member: 1914"] Yes, you should add foam to make it unsinkable as well as achieve upright and level flotation according to USCG rags. The formula: Vessel weight / 60 = Cubic feet of foam The foam weighs 2 pounds per cubic foot, water weighs 62 pounds per cubic foot, so the foam gives you 60 pounds of flotation for every cubic foot. So if your vessel weighs 200 pounds you will need 3.3 cubic feet of foam or, a one gallon kit. 200 / 60 = 3.3 The specs I quoted (60 pounds of buoyancy) are for Hi-Bond foam, which is what I use, your foam may be different. Also, your plywood will give you some buoyancy as well, find the specs online to calculate your ply buoyancy and then subtract that from the overall amount of foam needed. [/QUOTE]
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Jon and V Boat Conversions & Modifications
Cavman138's PolarKraft 1648
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