As near as I can tell, the problem is that SH3 renders the world flat while it is a globe. The numbers were changed to reflect how far the particular vessel could travel on a load of fuel. The numbers in SH3/GWX3.0 are as realistic as possible, and are a compromise. See pages 50 and 51 in the GWX3.0 manual.
As far as the conversion of the Km in the .sim files; I am working on an answer. Since I don't know how to open the .sim files, I can't check your math or logic.
When I get a definitive answer, I'll get back to you.
__________________
Irish1958
|