B777 rudder trim
Hi All....
Feel a little embarrassed asking this question but the answer cannot be found in any of our company manuals.
My question is how does the B777 rudder trim work? Is it hydraulic or electric? Does it move the whole surface or just the tab? If you hit the "reset" button on the ramp without hydraulics powered, the indicator moves. Does anything actually move on the tail? Does the operation change as control laws change?
All our books tell us is how to turn the knob and push the button.