[pct-l] Paint Weight

[hiker97 at aol.com]

Token writes:?When I'm not hiking, I do aircraft weight and balance for a major Seattle based aerospace firm.? The external primer and paint on a wide body aircraft can easily reach several hundred pounds to upwards of 1,000 lbs.

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Typical paint is 0.008 lbs per square foot per 0.001" (mil)?of thickness.? Typical thickness of a top coat of paint on an aircraft is 0.003 to 0.005".? I figure your tent stake painting is probably similar thickness - call it 0.004" for an average.

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So, knowing that, you should be able to figure out pretty easily the weight of the paint.? 

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Weight in pounds = 0.008 * 4 * stake length in inches * (stake diameter in inches)^2 * ( 1 / 144 conversion from square feet to square inches) * (3.14 / 4)

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Multiply by 454 to get the weight in grams.

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Example:

Call it 6" long stake 0.125" in diameter:

Wt = 0.008 * 4 * 6 * 0.125^2 * (1/144) * 3.14 / 4 = .000016 lbs = 0.007 grams per stake.

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Switchback replies:?Yes, those are the?calculations I use too......................... :-) 



Say, I just remembered that I only paint the top portion of the shelter stakes, so the weight is actually less than 0.007 grams per stake.? Some people only have me paint the very tops of their stakes to save paint weight.? Now that is what I call serious light weight backpacking.? I remember AsABat trying to put painted and unpainted shelter stakes on my electronic scale to see if he could determine the extra weight of the florescent paint.? 




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