A suggestion...

[iacob alex]

.....calling to mind,maybe some springing thoughts,related to a possible simplified gravity motor,you can look on with wonder and pleasure at :    www.youtube.com/watch?v=VAkyRia4UV4

     Then,to clear up the first line of a "paper plan",we need no more that :

         -a fulcrum,support.
         -a lever (constant arm+variable arm )
         -two masses

             All the best! / Alex

[iacob alex]

.....this time,in a day light about our day and night "dream machine" (gravity motor) at:
   www.youtube.com/watch?v=2smT3quuiRi

     The suggestion can be to minimize the design of a possible gravity motor : a "minimum wheel" with a single variable spoke...that is in fact a lever with one variable arm,only.

      This park-game machine has  a common power supply.

      Can we imagine as a power supply,the gravity motive power...starting with and imitating the first line design of this swinging amusement big "toy"?!

           All the best! / Alex