On Wed, Jan 2, 2013 at 5:12 PM, IVP wrote: > I've seen this on TV used in railway sidings. And also sure > it was somewhere in Holland/Germany. That was quite some time > ago, maybe it's com > IIRC the "drop tower" sort of rides at amusement parks use eddy current brakes also, beefy permanent magnets mounted on the car, copper/aluminum fins mounted on the tower. Nothing moving to fail, nothing that wears out. --=20 Jonathan Hallameyer --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .