User-defined step size for stability derivative calculation

[Cindy Chen]

Hi everyone,

I noticed that in the .stab output file, the default step size for alpha and beta-derivatives is listed as 1 deg, whereas for p, q, and r, it is 1 rad/Tunit. I tried to adjust the step size but couldn't find it anywhere on the GUI. Is it possible to change the step size through the .vspaero input file or the OpenVSP command line?

Thanks!

Cindy

[Rob McDonald]

No, it is hard coded in the source.

Have you tried the adjoint derivatives?  Those are analytical without any step size.

Rob

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[Cindy Chen]

Hi Rob, I have not. I am currently using OpenVSP 3.43.2 -- does this version have the adjoint capability?

[Rob McDonald]

No, you'll need to use 3.46.0 to use it.

Rob

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