- #1

- 2

- 0

Air Force Lug Analysis (section 9 here and summarized here) seems to be the best generalized method for comprehensive lug analysis. However, it relies on charts developed by the USAF in the late sixties. Every source I've found on the method uses those same images.

I'm trying to make an automated solver using MathCad (though excel, matlab, mathematica, etc could easily do it). But that relies on my code being able to read the charts or solve the underlying empirical equations.

Does anyone know what the source equations are for these charts or whether there is software that can solve them? The only thing I've thought of is plugging each curve into excel and then running through a best fit curve of each different equation type until I find something that fits well. This just doesn't seems precise enough to me.

Thanks in advance.

PS: any tips on how to improve the post are also appreciated

Edit: Attached is a first pass at 1/40 of the excel method. The original chart is underlain

I'm trying to make an automated solver using MathCad (though excel, matlab, mathematica, etc could easily do it). But that relies on my code being able to read the charts or solve the underlying empirical equations.

Does anyone know what the source equations are for these charts or whether there is software that can solve them? The only thing I've thought of is plugging each curve into excel and then running through a best fit curve of each different equation type until I find something that fits well. This just doesn't seems precise enough to me.

Thanks in advance.

PS: any tips on how to improve the post are also appreciated

Edit: Attached is a first pass at 1/40 of the excel method. The original chart is underlain

#### Attachments

Last edited: