It must be stated however, that the Germans did have far superior technologies at hand but it was Admiral Readers reluctance to use it that stopped it being refined and implemented.
IE, in '37 tests were done on the walter turbine, using electricity to separate hydrogen from oxygen. The products of combustion were almost nil except for oxygen and fresh water.
This boat was timed at 25kt submerged, and could stay under for several days running. Both Reader and the powers that be, refused to see it as anything more than fantasy. But the prototype had worked.
The german boats were much more seaworthy, and much simpler to operate, although they were more cramped. They had a smaller turning circle, faster to dive and much more maneuverable. They also ran quieter at silent speed.
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