The variables would be much easier to read and remember
in QuickBASIC format such as PropDiam or BladeCoordOutPut.

The big problem is the docs. Is the first file all you got?
If you have some more I would like to have it.

IMHO It would be hard to write in Lotus because I think it iterates
things until they converge. Don't know about Excell.

As I recall from going to Don's talks at Copper State last year
You can use it two ways. You can put in known things like prop
data, HP, diameter and it will calculate aircraft drag.

Once you know that you can put that data in and it will calculate
the optimum prop. Is this your impression?

Paul