Currently the aerodynamics (and apparently collisions) are only active inside a very small range of around a kilometer, which is descent for most ground multi-vehicular activities, but not at all for aerial ones. If, say, I want to try aerial refueling or test a surface-to-air missile, I have to keep within an insanely close distance from my target ALL OF THE TIME!!! And there's no option for a high-performance PC to extend this physics range. Please add this option as it is really hindering the potential of this game right now.
@s5ehfr9 good point! thanks!