Hi, I would like to know of some powerful free grahping packages. I want to plot equalities and formulas such as the ones in this attachment below- hard ones, ones that aren't in the f(x)=y form. Please let me know of any good grahping pacakges you know where I can plot such equations and formulas.



(edited spelling in Subject line)

Which flight controls book is that? That page looks familiar.

You could prepare plots in Microsoft Excel. Thats what I would do. Since only a few of those symbols are actually going to vary, it would be fairly straightforward to set up a spreadsheet for that.

This is Mechanics of Flight by Warren F. Phillips. Great book I tell ya! Also, do u know of any tutorials for excel because I am no good with it.

No, no tutorials that I know of, I have used excel for years and I am pretty much all self-taught. Its really pretty simple, there's not much to it. In school, I've had spreadsheets that could make your eyes bleed. Just start it up and I think there is a Microsoft tutorial in the help section, it'll get you started.

Those equations are really only a function of one variable, the CG location, the other symbols represent empirical values that are characteristics of the airplane and don't readily change for a given airplane, such as the wing and horizontal tail lift coefficients and the volumetric coefficients.