It was not just the performance specs, either. The USN torpedoes were
inacurrate, often running so deep that they passed under the enemy
ship. More than one American sub was sunk by its own torpedo. See
www.warbirdforum.com/okane.htm

Dick O'Kane (the subject of that book review) recalled that when word
went back to Washington about the faulty torpedoes, the brass blamed
the sub skippers for their tactics rather than examing the torpedo for
defects.

The aircraft torpedos used by the TBD's were about as bad. There can be no
more harrowing thought than that of the TBD and TBF squadrons at Midway being
slaughtered making their runs to deliver torpedoes that tended to explode on
contact with the water.