I'm trying to make a Mathcad document that calculates the performance requirements for a vehicle. Right now I'm trying to calculate the power requirements at various speeds and plot it on a graph. However, I bumped into a problem where it's telling me, "There are too many range variables." It's highlighting the variable for frontal area, which I have defined as A:=3.91m^2. Can anyone figure out why it's telling me that A is a range variable? I have attached the mathcad file for reference.
Also, I can't imagine I'm the first person to do this calculation in Mathcad. Does anyone have a document that already does this type of calculation?
Additionally, if you see anywhere where I could tighten up the syntax, please let me know. This is my first attempt with Mathcad.
Thanks!
Josh
