Hi Nick, I wanted to do this @ age eleven (22 years ago), I had misinformation that copper blocked magnetic fields and so I deduced that a suitable "shading" type arrangement would produce a "perpectual motion machine". Anyway it's all out of my system now ! Robert L. Forward writes most adventurous and yet plausible S.F. on monopoles, neutron stars, gravity field pecularities etc. regards, Graham Daniel. Nick Taylor wrote: > > Congratulations!!!! The world's first perpetual motion machine!!! > And all us PIC Listers will be able to say we knew him back in the > last century! > > Wagner Lipnharski wrote: > > > > What is the most positive way to block magnetic field using a 5mm *any > > material* board? > > Take a look at the picture and tell me why it doesn't work. > > http://www.ustr.net/jpg/moto1.jpg -- Steam engines may be out of fashion, but when you consider that an internal combustion engine would require recovery of waste heat by transfer just before top dead centre then fashion becomes rather redundant, USE STRATIFIED HEAT EXCHANGERS ! and external combustion. You heard it first from: Graham Daniel, managing director of Electronic Product Enhancements. Phone NZ 04 387 4347, Fax NZ 04 3874348, Cellular NZ 021 954 196.