It was nice to see this being done with less amperage in another link you provided in your pdf: http://www.youtube.com/watch?v=-1PgR1hyXHs&feature=related
BTW, the first link in your pdf appears to be dead. Harry > > I've updated: > > > > http://www.mtaonline.net/~hheffner/HullMotor.pdf > > > > to add: "Regarding Fig. 5, a strategy to improve conductivity and > > yet > > retain some of the effective flux is to construct the driver disk > > > using a thin copper disk sandwiched between two iron disks. A > > further improvement would consist of cutting fine radial groves > in > > the outer portion of the central copper disk in order to keep the > > > radial current tightly confined geometrically. It is possible to > > > construct both the brush disk and active disk in an identical > > manner, > > and thus obtain two active disks. The control experiment then > > consists of replacing the iron disks with copper disks." > > > > Best regards, > > > > Horace Heffner > > http://www.mtaonline.net/~hheffner/
