I just experimented with the ever lovely setvelocity
#loop
~0.1
?(player == driver ah1): ah1 setvelocity [0,0,-1]
goto "loop"
It's certainly not pretty, but it gives somewhat the effect you're looking for. Here's how I tried it as an attachment. Board the chopper and give it all she's got scotty.
If that looks ok to you we can start thinking how to end the script
* Artak stays back and waits for someone smarter think a better way to do it