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FRICTION FACTOR CALCULATION IN EXCEL

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Radigan Engineering have a free to download excel spreadsheet. Taken from their website: When in the course of human events it becomes necessary to calculate the Darcy-Weisbach friction factor… engineer’s often throw up their hands, go back to their old college textbooks, and say “about .02!” [Which normally isn’t off by more than a factor…

Textile-based ductwork distribution systems

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This module considers the design and application of textile-based air distribution systems which are sometimes used as an air input for LEV Systems. Taken from the article: Examples of the application of fabric- or textile-based air distribution stretch back into the mid-20th century, where simple, inflating cotton bags (or ‘socks’) were attached to the end…