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  #11  
Old 12-29-2018, 11:35 PM
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Quote:
Originally Posted by BEC
OK - well that just proves that Im not the best with cheap digital calipers.....

Or it was humid and your tubes were retaining water.
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  #12  
Old 12-30-2018, 12:18 PM
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Are we still talking about rockets?
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  #13  
Old 12-30-2018, 02:28 PM
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Well.... I was. Not so sure about tbzep.
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  #14  
Old 12-30-2018, 04:24 PM
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Quote:
Originally Posted by ghrocketman
There's your answer...0.035" thick.
FWIW, on the topic of paper tubes, my experience is that the wall thicknesses for all of them are multiples of 0.007 inches, or very close. The tubes tend to be 2 to 7 wraps of paper that thick.

Besides the Estes 3" tube having a wall of 0.035" (5 layers):

o BT-50 is 0.013" (2 layers)
o BT-55 is 0.021" (3 layers)
o LOC 3" is 0.050" (7 layers)

From looking at the data this way, for paper tubes, I conclude you can deduce the number of layers by dividing the wall thickness by 0.007. YMMV.

Doug


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  #15  
Old 12-30-2018, 06:35 PM
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Makes sense
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  #16  
Old 12-30-2018, 07:15 PM
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That's some good info, Doug !
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  #17  
Old 12-30-2018, 09:59 PM
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Quote:
Originally Posted by tbzep
Or it was humid and your tubes were retaining water.

I hate it when that happens.
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