Might not be in a flying adaptation but way back in the day I had a fair bit of contact with VBS1 when it was rolled out for US and Australian forces. Bit from the development side but mostly beta testing modules with the full intent to "break" the realism it was intended for.
With the limitation of the commercial game engine it was built on lots of dodgy hacks had to be implemented in an attempt at simulating real life weapon systems.
Still have the full set of software gathering dust on a shelf.