How to operate SEEGEE calculator?

[Vantskruv]

I mean these ones:

http://www.seegeecal...ab-2/saab-340a/

 

What are the moving parts and where do you start?

 

I've read a description for how to use the calculator, but it is hard to understand when you don't have anyone in your hands.

 

Also the index at below, what format is that in? I.e. is it CG offset in inches?

 

I.e. I read in a manual:

"Obtain the starting aircraft 'index' value from the Flight Release."

I guess what this means is some type of CG offset value in a BOW configuration. I want to try finding out what the index value format is. Though if you look at the 0 index in this example, the aircraft is unflyable outside the limits.

 

I'm asking this as it would be fun to implement these calculators for different airplanes in X-Plane. Though the problems is the get the starting index and know how the calculator works.