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  1. R

    schrenk approximation

    Does anyone have a schrenk approximation excel spreadsheet set up? I created my own using the info found in the link below. http://www.lightaircraftassociation.co.uk/2010/Engineering/Design/schrenk%20approximation.pdf I'd like to compare my findings to another spreadsheet if possible.
  2. R

    Spar Sizing

    I am designing a model airplane and plan to use a spruce spar. I used the schrenk approximation to calculate the the moment and shear stress along the semi-span. I found the moment at the wing root to be 2681 lb-in, which seems about right considering review of other design reports. For...
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