Quote:
Originally Posted by LeakyIdeas
drip a small amount of water into a tube at 500F it expands to about 1600times it's volume,
heat a small rc motor to 500-600F and small amount of water is injected a few degrees ATDC, it will expand 1600 times and force piston down
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The first option sounds like a flash boiler, not a bad idea.
The RC motor is an interesting idea. Put a bunch of RC motors in the exhaust, and with there cooling fins they would quickly heat up. I could see the limiting factor being the rate of heat transfer into the water, which only has the surface area of the combustion chamber to transfer the heat, and not much time to do it.