Evidently something odd is happening to my SR-71 for FSX by Alphasim. I will be flying after leveling off at 70,000' in a 100fpm climb cg at 25% just fine and dandy on autopilot. suddenly the aircraft starts rolling left and right. It is as if it suddenly becomes dynamically unstable. I can sometimes fight out of it after disengaging the ap but by the time I'm done I have used a lot of fuel and I am off course by several miles. Or the plane over AOA's and does what any self-respecting SR-71 does at mach 3 in an accelerated stall...it falls apart.
Ive also heard of it happening on other planes that are default but I have not had that issue with any other plane.