Ah sorry, found it: it is only present for the AV-42C aircraft.
I thought it was for "Any Vehicle".
I did the Mach Loop with the AV42, fun times !

Suggestions for improvements:
- add free flights to each of the 3 aircrafts
- name the airports bases to avoid calling every base until finding the correct one on the nav map

- add a GPS group with coordinates to folow the actual Mach Loop more easily

Hello, very interested to fly the "Mach Loop".
So I got both this and the "North Wales Map" but don't see any free flight mission in single scenarios in game ?
Through the Mission Editor I do see the map however.

Could you explain how to play this ?