rocket powered hamster wheel

Hey all, since yesterday I have been trying to figure how to have an AI helicopter wait for a group of players to get in, take off and wait for the players to rappel then leave and land. I have looked at various guides and scripts but I have not been able to figure it out. Any help figuring would be greatly appreciated.

Thank you very much for the assistance! I think I should have mentioned I already had the rappelling part figured out, but not the AI part.