This site is being deprecated.
Please see the official X‑Plane Support page for help.
I am not with Laminar Research; just a flight simmer.
Firstly X-Plane 11.30 is still in the testing stage. It has not been officially released as yet. When? Soon!
Drop in frame rates is a known problem with XP11.30. See other postings in this forum. In the meantime the following link found at https://www.youtube.com/watch?v=Tvp8C0rPAuw may be of some interest.
This site is no longer being actively maintained.