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Topic: Torpedo strikes< Next Oldest | Next Newest >
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Chris Johnson Search for posts by this member.
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PostIcon Posted on: May 01 2001,12:59  Skip to the next post in this topic. Ignore posts   QUOTE

From the attached photo, what would be the guess as to the height of the water from the explosion? 300-350 feet?

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Mike Wenger Search for posts by this member.

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PostIcon Posted on: May 01 2001,7:52 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE

Chris

If you mean geyers in general, I would say at least 500 feet, and sometimes, up to nearly 1,000 feet.  In this particular photo, the strike on Oklahoma is about 500 feet high-- West Virginia's is much higher, perhaps 700-800 feet.

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Larry Jewell Search for posts by this member.
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PostIcon Posted on: May 01 2001,6:44 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE

Looks like OKLAHOMA's is on the downturn, while WeeVee's is just going up.  It'll get higher than that, if the explosions I've seen are any basis for guessing.
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Chris Hawkinson Search for posts by this member.

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PostIcon Posted on: Mar. 16 2004,3:15 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE

Hi everyone;

I know this thread is a bit old, so hopefully I'm not breaking protocol to post.

Something about the photos of the torpedo strikes at Pearl Harbor that sticks out to me is the height of the gyser when compared to the height of the gyser when YORKTOWN was hit at Midway.

This brings me to a couple of questions.

1)  Does the height of the gyser have anything to do with the shallow waters of Pearl Harbor?

2)  If the gyser height is affected by the shallowness of Pearl Harbor, did that shallowness also impact the amount of damage done to the ships?  Given that torpedoes were non-penatrating weapons, could the shockwaves have been reflected off the harbor bottom and cause additional damage?

Thank yiou everyone.

Chris
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David Aiken Search for posts by this member.
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PostIcon Posted on: Mar. 16 2004,9:13 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE

Aloha Chris,
My cohort in research, John DeVirgilio, addressed the torpedo and the destruction it caused at Pearl Harbor in his "Seven Seconds to Infamy", Naval History mag Winter 1991. In reading this and rereading the interviews of the Japanese torpedo attack veterans, for my article "Torpedoing Pearl Harbor", Military History mag, Dec 2001, yes, I am sure that John would agree with your questions as I do.

1)  Does the height of the geyser have anything to do with the shallow waters of Pearl Harbor?

The shock wave from the approx 500 pounds of explosives had to bounce off the harbor floor and join the water geyser already headed up.

2)  If the geyser height is affected by the shallowness of Pearl Harbor, did that shallowness also impact the amount of damage done to the ships?  Given that torpedoes were non-penetrating weapons, could the shock waves have been reflected off the harbor bottom and cause additional damage?

Yes, the shock wave must be included in the damage...the force had to be dissipated which would include further damage to the target.

Of interest, the varied heights of three torpedo hits which show up in NH50929 reveal the great height of the first water 'pole'. Uniquely, the spouts directly reflect the relative launch positions and spacing of the three planes...interesting?

In "Torpedoing Pearl Harbor", Shotaicho Jinichi Goto related that the first six aircraft had a unique formation. Thus the unique number water 'poles' so close to each other. The first six B5Ns went through the gauntlet of Southeast Loch in TWO trail formations, thus different than the following planes' "single file, Indian style" trail formation.

Murata's number two wingman was to his rear [and, per the photo, slightly to his right] with the third wingman trailing the #2. Goto, leader of the other three B5Ns, was to Murata's left and rear with Goto's two wingmen trailing him. Their job was to torpedo the possible torpedo nets then crash into such nets to open the way for the following planes to hit the ships. Because there were no nets, the unauthorized 'suicide pact' never resulted.

Hope this helps,

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Chris Hawkinson Search for posts by this member.

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PostIcon Posted on: Mar. 16 2004,4:52 Skip to the previous post in this topic.  Ignore posts   QUOTE

Aloha David:

Thank you for the response.  I had read" Seven Seconds to Infamy" last night, and I'll be sure to get a copy of "Torpedoing Pearl Harbor".

Thank you again.

Chris
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