Originally Posted by
david340r
This doesn't seem to me to be a useful analogy. Where is the "side load" coming from? There are pivots at the jack screw attachment points.
Yes, the pivot points share the load, but not all of it.
At the point where the clutch connecting the screw jack to the electric trim motor starts to slip or the manual trim wheels can no longer be turned, then the friction on the screw jack threads exceeds the torque applied.