inventive and curious people, when they first decide to invent a machine, usually are driven to it by the idea that it must be possible to build a motor that runs on magnetic repulsion and doesn't require electricity...

this guy explains it better than I can: http://phact.org/e/z/freewire.htm

undissuaded, many then turn to the idea that we can elastically stretch matter in a spinning flywheel and selectively "magneto-compress" :}(){: this and thus release traction potential. Some then think of two flywheels... .My version of this particular blind alley is here...