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  1. andyhessler

    Instances in Relations

    Hello, I'm wondering what commands to use to write relations in an assy that extracts values of parameters from various instances. I have two instances...and I want to compare their mass...and then set the generic mass to the lighter one. (Yes...there are easier ways to do this) But, I'd like...
  2. andyhessler

    Plotting Viscosity Data and making the ASTM D341 Graph (Logarithms)

    Thanks for sharing your spreadsheet. I am beginning to think the brute force approach is going to be needed...where I plot all of this out in AutoCAD. Wish me luck!
  3. andyhessler

    Plotting Viscosity Data and making the ASTM D341 Graph (Logarithms)

    Walther formula[edit] The Walther formula[1] is typically written in the form log_{10}[\log_{10}(\nu+\lambda)] = A - B\,\log_{10}(T) where λ is a shift constant, and A, B are empirical parameters. http://en.wikipedia.org/wiki/Temperature_dependence_of_liquid_viscosity
  4. andyhessler

    Plotting Viscosity Data and making the ASTM D341 Graph (Logarithms)

    Hello all, There's been a few discussions on the Walther equation for plotting the viscosity/temperature relationship of lubricants. I'm trying to basically make my own plot...but I am having trouble understanding the vertical scale to use to get the linear relationship. I think I've puzzled...

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