Hello Carl,
The AI horn command sends the wrong signals directly to the Trainz code and my script cannot intercept them. The Track Aircraft Action trigger is also not suitable, as you have to cross a trigger to get it to work and this is not realistic until you have started up an aircraft before moving (B key), and as you say the heliport is too small.
That is why I did the two new rules for the aircraft to operate under AI. I mention them and other functions in the config description of the models.
Download the rules and tick them in Surveyor in the Driver setup menu to make them active for your session to use:
Aircraft Engine Start Command, kuid2:60238:80004:1
Aircraft Helicopter Takeoff Command, kuid2:60238:80005:1
Perhaps I could have listed the triggers as dependencies of the models so they would be downloaded with the aircraft, but even then you would not know about them unless you looked at the config description in CMP.
Ian