To further control drag and output power over a range of flow velocities, the preferred turbine comprises a DC generator with voltage feedback controlling field excitation, coupled to a voltage and current regulating circuit that performs electrolysis of {HEAD ~ water} to produce {TAIL ~ hydrogen fuel} 
To further control drag and output power over a range of flow velocities , the preferred turbine comprises a DC generator with voltage feedback controlling field excitation , coupled to a voltage and current regulating circuit that performs electrolysis of { HEAD ~ water } to produce { TAIL ~ hydrogen fuel }
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