Flying any aircraft near the service ceiling is a delicate balance. Fly too slow and the aircraft can experience low-speed buffet. Fly too fast and there is the possibility of high-speed mach buffet. Both conditions occur when the air flowing over the wings begins to separate either because of excess speed or a high angle of attack. Increasing the g-loads on the aircraft has the same effect as increasing the angle of attack. Turbulence or a steep turn then can be enough to make the plane become unstable and even uncontrollable. Some pilots describe it as feeling as if the plane is balanced on
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