02-06-2021, 09:46 AM
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Aggressor Aerospace
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Join Date: Oct 2012
Location: Colorado Springs, CO
Posts: 592
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It's just subtraction! For example, if the top of the cylindrical portion of a model is at STA 100 and the bottom of the cylindrical portion is at STA 950, then the length of that section is 850 (of whatever units the drawing is using - centimeters, inches, etc). That's all there is to it.
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