.....starting with : https://fr.m.wikipedia.org/wiki/Acceleration_angulaire
.....but not as a sling/throwing "old" ( war...) simple machine , but as a possible "new opportunity" :
     www.geocities.ws/iacob_alex/Some_Drafts/text048.jpg
.....so to play a self-repetitive (continuous...) gravity unbalanced leverage.
     An old "war" gravity simple machine...into a "new"..."peace"/gravity potential discharge simple machine...or a "modified" trebuchet , nothing more!
     We can use the basic concept of mechanics (leverage) in a "new manner" vis-a-vis gravity?!?
     Qvo vadis?
     Al_ex