Hello Fr.Bill
I think there was a mishmash between feet and meter.
If the developer has had the data from a papersketch with feet data and build it
with meters you get the shown big aircraft.
[color=#000000]
Actually, the problem is the result of folks who don't read instructions, or at best don't understand them properly.
In both Max and GMax, the "System Unit Scale" MUST be set to "1 Unit = 1 Meter." This defines how the mesh will be re-scaled during the Export process. It has nothing whatever to do with the "units of measurement" that the modeler will use in Max or GMax, which are set in another part of the configuration, and may be metric or decimal, with a number of variations for each.