A negative voltage wouldbe applied to the large ring conductive layer. A slight push onthe rollers would be required to start it. It should becontrollable by lowering or reversing the voltage polarity on thelarge ring. The vector relationships are the same for all. As a resultit seems prudent to have many independent tests being done aroundthe world.
Construction is simple and testing easy.
Associatedcosts for materials should also be low. Let's do it friends andget the world off of burning up fossil fuels. There are muchbetter uses for oil than creating CO2, NO2, Ozone, and smog.