>>It may be neat to look at electrolysis to generate hydrogen on demand and use >>it to control the submarine depth. Or drop some NiCad cells in the tank for >>emergency surfacing. Add a spark plug for extra thrust! > A spark plug??? are you trying to emulate the Korsk? Use palladium for the cathode in the electrolysis to make a minature P&F nuclear reactor. Use the helium ash to fill the ballast tanks. Flush the neutrons into a copper tube for magnetohydrodynamic propulsion. Presto, a model atomic powered submarine. No moving parts. Run silent, run deep. But then a simpler approach would be to use Alkaseltzer tablets in compartments that could be flooded. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu