Are you saying you found the issue to be the start position?
Out of interest is this the only thing you have added to the airport or have you already added a runway to your project?
as it mentions in the sdk docs that you need to have atleast 1 other airport object for the helipad to work.
Sorry I don’t know your experience level so sorry if any of my reply is insulting lol I don’t know how much you already know.