The range

What basis do you have for claiming this?

The range of all aircrafts on AE is calculated from the max range an aircraft have wich is based upon actuall charts provided by the manufactuer regarding payload/Range

To report a range discrepancy, you need to provide manufacturer-provided (or if not available, other reputable) sources containing the correct range.

In this case, please provide the "correct" ranges and sources for all of the aircraft in AE.

Also, keep in mind that the ranges in AE are statute miles, not nautical miles.