Originally Posted by
Flight Alloy
One question if anyone could answer, is there a flight regime where the electric trim motors/their gear train would not have had the power to further manipulate the stab? Seeing how great the forces were, and even though the electric trim is electrically driven and aided I imagine by a reduction gear set, it would not seem to me to be multiple magnitudes more powerful than the handle+wheel-cable/pulley driven manual system (which itself is a lever and force reduction aided system (handle+wheel plus cable movement per turn vs pulley size on the jack screw drive side) with certain mechanical advantage). Could it be postulated that at a certain speed and AOA, the electric trim may have stalled out itself, unable to bring the stab nose up even if commanded, seeing that the manual system was practically seized?
Not too likely. The electric motor is at the stab itself and the stab backdrives the trim wheels. The pilots are hand cranking the wheels about 100 feet away via cables. We simply don’t have the torque at that distance when out of trim. An electric motor has boat loads of torque and is connected more directly right at the stab.
edit: but it is of course still possible. Who knows anything at this point.