...this apparent cyclic hide out of a huge mass,can be an easy way to understand and imagine the game with the gravity and inertia for a self powered device in a gravity flow.
For a windmill,we have an elementary design Smax/Smin , as you can see at Gemini feather wheel,immersed in a fluidic flow/air ,water.
For a gravity flow the problem is becoming Lmax/Lmin.
As we know,the centricity and eccentricity are the basic spatial relations for the physical world.
When things come out of a center or,the reverse,go towards a center,a dynamic is created.
Moon phases suggestion ,for our application,can be as a cyclic,temporary hide out switch game for a mass involved in a VAP/variable arm procedure,as it was stated at Gravity wheel concept.
In two words,we can obtain,get this by loading the fulcrum,in a pulsatory manner.
The fulcrum is subjected step by step,to a cyclic centric and eccentric loading.
The same lever concept that is used for a feather/two unequal surfaces,can be used for two unequal moments in gravity.
Two coupled weights are self moving/slidind and rotating/ on an arm of a hub/fulcrum due to gravity,but one of them is like hiding from the gravity fall to a a rotational fall,or moves from eccentricity to centricity and then back.
These masses can be locked/unlocked together and so they become a whole for some time,one playing like as in/out of a physical game that is called centricity/eccentricity...like the Moon in the shadow of the Earth.
All the Bests! / Alex
...can be abstracted as an in/out visual apparition.
Sometimes in the past,as small kids,we played this so popular game in Europe...
Now,for this topic,between so many exotic proposals...one was about an in/out hide "game" with gravity,with the help of a fictional substance,called "cavorite" (remind also,H.G.Weels...about a cosmic trip).
Sure,cavorite is no more than a science-fiction dream relative to gravity ...
The problem is,if we can use this type of "game" (in-out of... ???) with the real physical world,so to get a working gravity powered device?!
Let's forget the theory,an experience like "keeping under one's hat" periodically the gravity fall , alone can decide on truth.
Nothing new in physics,a technical artifice only...
All the Best! / Alex