A special Bespoke Event called "Start" (case is ignored) can be created for each aircraft which will automatically run when the aircraft is in use.
The "Start" event runs in the background on its own thread. If its built as an infinite loop (e.g. uses a Goto Task to continually loop back to the start), it will never end and run continuously as the timeout for background based Bespoke Events is ignored for "Start".
If you create an infinite loop, you must add a suitable Sleep Task within the loop otherwise system CPU usage will surge to 100% and the system will slow down. E.g. Sleep 250
It's useful as it allows the continual retrieval and manipulation of Variables/Datarefs, allowing the results to be stored in Bespoke Variables.