The B-52 autopilot system I worked on for several years had two "power steering" modes- - - - -air refuel and low level. Transducers in the control yokes sent signals to the autopilot servo motors, which assisted the pilot's control inputs. Air refuel was a smooth, gradual power boost. Low level could break the wings or tail off unless the accelerometers in the airframe kicked in to limit the output. That was used to sneak up on a target at extremely low altitude and hide in the ground clutter that kept radar signals from seeing them. A hotdog pilot could make that big MF'er do some impressive stuff!
