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Ride116 said:
Isn't there a theorem stating that circles (not ovals) have the most surface area when given a certain amount of material, or most efficient use.
Yes, circles have the greatest surface area for a given circumference. Thus in order to get the most surface area on the lightest piston, you need a circle.
 

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510Mods said:
Could use a Ruby Laser in a sealed chamber. Then when the atoms hit a substrate they are drawn into another combustion chamber. Almost like if you were to use a plasma cutter to heat a material, collect the products air and fumes, then use them for another process.
Umm, so how exactly is this engine going to make more power than the whatever-you-use-to-dissociate-water device consumes? Considering you're talking about breaking the bonds and then reforming them, I don't see where the energy release will be.
 
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