Since these gravitys motors have to have like a certain Gear ratio,
(where one wheel is smaller then the other,both help each other to spin but really it gets faster)
for a overlap force.
(which this technology is simular to magnet motors ,but this, with gravity and speeds of wheels.)
im thinking of like a VVTI Engine system like those in toyotas where it reaches a certain rev and it feels like a turbo,
other wise how would you control the RPM Of a gravity motor?
other wise it would stay at a certian speed (so some vvti gear system as a rpm throttle).
(also a de acceletator,where it slows it down)
?
i think its possible .
no not with valves but with gears of gravity disks spinning,
which can control the big gravity motor as a resistance or a overlap. (?)
or use a telsa turbine you know :-).
or use a brake (but if you control the rpm speed then , that motor acts a brake it self ?)
also a Gear system , so you maybe won't need gears .?
,
like negative resistors, and positive resistors, (2 very different sides eh?)
heres something to get you thinking ,
over unity.
http://img403.imageshack.us/img403/5583/somethigntogetyouthinkingoveru.jpg