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| | Naval History Magazine: Pearl Harbor Attack from Below, by Rodgaard, Hsu, Lucas, Biache (Site not responding. Last check: 2007-10-05) |
 | | Since the midget torpedoes were Type 97, which contained a 1,000-pound warhead, and the air-drop torpedoes were Type 91, which had a 452-pound warhead, the explosive energy to be considered in the underwater explosion analysis ranges from 452 to 1,000 pounds. |
 | | Thus, the midget submarine is within the cavitation zone and was buffeted by a vertical motion, exposing the conning tower and its contra-rotating propellers. |
 | | During this time, the submarine was struck by a series of concussion waves struck the submarine; because of a loss of trim owing to the release of her torpedoes, the effects of her speed, and the oncoming concussions, the midget broached the surface as she was buffeted by cavitation effects. |
| www.usni.org /navalhistory/Articles99/Nhrodgaard.htm (3344 words) |
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