In reply to William Beaty's message of Mon, 28 Aug 2006 14:41:03 -0700 (PDT): Hi, [snip] >One big possibility is that they've discovered a way to make magnets >slowly demagnetize themselves while they also inject KE into a rotor. In >the interview above, they mention that they haven't proved whether the >energy is coming from the electrical energy that was originally used to >magnetize the magnets. [snip] Assuming that NIB magnets have an energy density of about 40 MGO (this is actually on the high side I think), then we can easily compare this to the figures they have already provided:-
i.e. 500 mW/cc for "weeks". Assuming only 2 weeks we get a figure of ~6E5 J/cc = 7.6E7 MGO. A factor about 2 million times greater than the energy density of the magnets. Unless I seriously misunderstand magnets, then I think this rules out energy stored in the magnets during their creation. (MGO = Mega Gauss Oersted, an energy density measure). Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
