> At 50A, to produce 2 Faraday of charge it would take around 3840 seconds > (more than one hour), to produce 2g of hydrogen. > How far you can go with 2g of hydrogen?" > I don't think you will get any substantial amount of hydrogen to show > any appreciable effect. The amount of Hydrogen is not of relevance for considering what can be achi= eved. H2 here, a in many systems that use it, is simply a medium for energy storage, transfer and conversion. What is of relevance is the amount of "excess" energy that goes into (mechanical) and out of (electrical) the alternator, and how efficiently this is used to produce Hydrogen (electrolytic cell). Hydrogen can be burned at close to 100% efficiency so if thermal gain is all it's used for then energy into alternator and energy out of Hydrogen are the only metrics that matter. Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .