Rpm issue

[Maury2019]

Since the takeoff and for the entire flight, the engine rpm keep oscillating beetween the imposted value and zero, makes the aircraft impossible to fly.No matter the throttle setting or the  fuel lever setting.

[Maury2019]

any help???

[Cameron]

What frame rate are you seeing as this happens?

[Maury2019]

[Maury2019]

this is the indication when it happens

[Coop]

You are running at 5fps. The physics engine requires your simulator to be running at least at 20fps, ideally 30+ fps. X-Plane in general requires >20fps to function properly.