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Originally Posted by AntEater
How about that:
Fuel cell submarines which take the hydrogen/oxygen for the chemical reaction to generate electricity directly out of the surrounding water!
A absolutely no fuel AIP engine with almost no moving parts....
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Unless you had another energy source (such as nuclear power) to split the H2O molecule, that would fall under the category of "Perpetual Motion Machines", which violate the Laws of Thermodynamics
