Originally Posted by
PEI_3721
ProPax,
There could be many intermediate alternatives.
Why is such a large trim range required; if this could be reduced then the trim wheel force might be reduced. This might require cg, speed, altitude restrictions; room for compromise.
Reduced elect trim speed (trim motor electrics - runaway scenario) could be another option, or an increased lever arm for manual wheel operation, or increased gearing for wheel speed.
Adjust the elevator effectiveness - might be a bit drastic, but if needs must.
In case the forces have increased the complete mechanical system might be unsafe. First thing that comes to my mind are the steel cables... but is not limited to those only