Originally Posted by
Speed of Sound
Thanks for that. The ball nut seems to be transferring the load from the jack screw threads to the attachment point of the ‘ball nut’.
Watching it made me wonder whether there may be a lubrication solution to the problem.
I'm struggling to see how the ballnut/jackscrew interface can be subject to any significant load other than an axial one.
As for lubrication, even an (imaginary) entirely friction-free mechanism would still be subject to pretty well the same aerodynamic loads.