On 15/05/2011 01:47, RussellMc wrote: > so far, no clear, easily constructed, consistently > reproducible and "well enough" understood "over unity" device has ever > been demonstrated publicly. Not ever. There won't be. Electrolysis and then hydrogen burning has a net loss. Theoretically it=20 can only reach unity. 1) Losses Electrolysis stage: resistive losses in wiring and power control circuits recombination of 2x H and O to water Leakage of hydrogen 2) Losses in burning: Mechanical losses of motor (bearings, valves etc) Control Electronics Leakage Incomplete combustion Thermodynamic losses of engine design/ However you can cheat... For example if burning fuel in an engine is incomplete or in some way=20 delivering less than the maximum theoretical stored energy, then some=20 process or catalyst (or combustible combustion enhancer) could give you=20 more mpg (or kilometres per litre). No laws are broken. A turbo charger=20 is an example of "cheating". It doesn't give you anything for free. It=20 can raise efficiency by reducing waste energy. You are not getting=20 extra. just better less than 1 efficiency. Of course historically turbo=20 chargers may be optimised simply to get most power for same size engine=20 and this might even reduce efficiency, it lets you feed more fuel and=20 air than otherwise possible. Same with a Wankle Engine, does impressive=20 Power for size but is actually less efficient (maybe there is a sealing=20 issue) I'm sure there are ways of getting closer to 1. But any over unity=20 device will simply be found to be using stored energy in an un-obvious=20 fashion (like a power station with its own oil or gass well hidden in=20 the middle). Or the self winding watch. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .