Hi Avsim!  I have been experiencing a weird bug recently that has started to really annoy me.  Whenever I've been flying my fighter jets (aircraft with Tacpack enabled), I have gotten this weird bucking action without any steering input where my vertical speed would be all over the place at times, to the point where the pilot would be seeing red from all the negative g's the aircraft was pulling.  Apart from being very irritating, it affects my aim.  I also have accufeel and Active Sky Next running, although I have tried running without both and the problem still persists.  Any ideas?  

 

Thank you!  

Does it happen when you are flying formation? Active sky wake turbulence effect is busted and should be set to zero.

 

Donald

My first guess would be turbulence.  Beyond that, either flying the aircraft outside of its design parameters or a problem with your joystick.