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PSI for sheeting a foam wing

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Old 10-07-2019, 03:14 AM
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jester_s1
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Default PSI for sheeting a foam wing

When you stack weight onto a foam wing for sheeting, does the PSI get split between the two sides, or do both sides get the full amount? For example, if I put 200 pounds onto a 200 square inch wing, would the resulting pressure be 1 psi or 1/2 psi on all the sheeting?
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Old 10-07-2019, 07:31 AM
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Presuming that there is an even weight distribution across both the upper and lower surface there will be one pound on each square inch on both the upper and lower surface. The force will follow the direction of gravity so this assumes that both surfaces are parallel and perpendicular to gravity. For practical purposes as long as there is enough force to hold the sheeting in contact with the foam, at least as long as you don't exceed the crush strength of the materials, then you have enough.
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Old 10-07-2019, 08:31 AM
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The problem is that the weight distribution is never equal when doing weights. The only way to get uniform pressure is to vacuum bag.
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