The Mil registered ac have different software to include AAR calculations, so it could be particular to those ac.
Not so,
Uncle Ginsters! By now, Voyager certainly
should have a Mission System, which delivers AAR planning and management, but as the system still doesn't work, it hasn't yet been incorporated.
Whereas the A310MRTT had a specifically mandated requirement for the Mission System to be standalone and emphatically
not to be capable of interfering with the (non-FBW) core aircraft software. As a result, it works well - as does the A310MRTT, of course.
The A330MRTT has, as I understand it, a modified AFS whereas the 'green' civil A330 aircraft operated by AirTanker are simply normal A330-243 aircraft painted grey.
If only Airbus Military had taken a leaf out of Airbus (Hamburg)'s book and simply converted the A330 to include minimum necessary modifications (such as the A310 Mission System) - preferably NOT in Spain, the RAF would by now have had a more reliable, simpler and more effective tanker. But someone let clever-devil engineering geeks loose on the design and the current bolleaux is but one result....
It will be
very interesting to learn how software assurance will be provided to MAA concerning the audit trail of the A330 Mission System if/when it is ever considered ready....
