In regard to the the flipping, is this with your augmented .air/aircraft config files or with the original 15.2 files? Either case, I'll take a look into it.
Jimi: Backflip behaviour can definitely being triggered with the out of the box 15.2 version. Checked it last night several times and rechecked this morning again, after rebooted PC: positive! Btw, I really would not bug you with unique issues, concerning my own modded air files, without explicitely mentioning and, unless I have confirmed the same issue persists with the current unchanged NH FSXBA version, too. I am usually not that mean!
But you are right to ask.
What I do in order to trigger reproducable backflips: After takeoff full AB applied, gaining speed, plane is level, gear is retracted, flaps are in Auto, altitude sea level (~600-1000ft), barely gaining altitude, approaching speeds of ~380kts, reduce thrust to max. dry thrust (maybe a tad lower), quickly bank hard to ~90 degress, and now at speeds ~400kts, pull full stick and do not let go. Usually I try to keep her at the same altitude doing small corrections with the ailerons with stick fully pulled. As speed decreases and AoA increases she will reach the 22 degrees. Here you can feel, that more elevator is appied by the FCS. The turn will tighten now, and she will reach 30 degrees AoA. If you do not have the right speed, too slow or too little thrust (e.g. 1/2 of max dry thrust) she will be too slow for a backflip (max AoAs stay in the high twenties, below 30) and if you are too fast or apply too much thrust, e.g. AB engaged, you will not reach high enough AoAs, above 30 degrees. When you have the right speed and thrust you can see the AoA transition quickly above 30 deg and beyond 35, when the stall warning will sound shortly before she back flips, if you still apply full stick and do not let go.
These backflips during tight turns can be triggered in numerous variations, the above mentioned variant, I found is the most easy way to consistently reproduce. An other way is e.g. during normal flight with speed ~400kts, if you completely reduce thrust during the beginning of a tight turn (to bleed speed faster), and later when you have turned around ~180deg. from you original flight path, as you feel she is getting slower, in order to avoid getting too slow, apply max dry thrust again (no AB to avoid being pushed out of high AoAs by too much thrust).
I use this routines to check/experiment with how high AoAs I can pull with the plane, a maneuver pilots do in order to get into a position behind the opponent, when they first approach each other head to head. The jet being able to pull higher AoAs and bleeding speed faster will be in the most favorable position - one thing the Hornet was designed for and is very good at.
Thanks for the prototype link! I will have a detailed look later this day and report back.
Best regards, Peter