Flight Simulator 2020 How to Avoid Crash at X4 or 8 speed.

In your Aircraft configuration "Systems.CFG" under Auto pilot.
max_pitch = 20.0
max_pitch_velocity_lo_alt = 15
max_pitch_velocity_hi_alt = 15
I have tested this on a number of flights before making this video.
Important note your altitude is going to be a key factor for this to work: FL400 only if travelling towards the south.
Travelling West to East northbound FL310 is best.
Do feedback if you encounter any problems.