Here are a couple clips. Excuse the floating flame pots ( harry potter effect) was a night flying training mission and aided finding the aerostats. I am using the AI mod, but I have run this mods on and mods off and have had the same effect.
Both clips have AI pairs that spawn and chase a waypoint over the aerostat. An attack command triggers before they get close to the aerostat telling them to attack any enemies in the air. The training mission spawns AI pairs to practice against and the aerostat keeps them in the field of play, makes them easy to find.
Unfortunately this is what happens if you don't get there first to distract them!
www.wingwalkers.org/vault/wwgeezer/RTW/AIclip.wmv