Author Topic: PRINCETON explosion report  (Read 614 times)

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Offline cannonmn

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PRINCETON explosion report
« on: July 28, 2009, 01:43:31 PM »
This report relates to the explosion of the 12-inch wrought iron gun "Peacemaker" aboard the US Navy screw-steamer "Princeton" in 1843, which killed six people including high government officials.  Sorry about strange colors of pages, I somehow "lost it" when I was trying to enhance the contrast.


















Offline GGaskill

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Re: PRINCETON explosion report
« Reply #1 on: July 28, 2009, 02:42:02 PM »
Very interesting; especially interesting is why this report did not receive much public notice at the time.

Certainly there can't be much excusing the lack of test firing prior to installation aboard ship and firing in the presence of unprotected personnel.
GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”
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Offline RocklockI

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Re: PRINCETON explosion report
« Reply #2 on: July 28, 2009, 03:05:08 PM »
i've looked at half the photos ....thank you cannonmn ! ;D

what i've read so far is very interesting .

gary

btw does the book have those swirly colors on it ?     
"I've seen too much not to stay in touch , With a world full of love and luck, I got a big suspicion 'bout ammunition I never forget to duck" J.B.

Offline cannonmn

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Re: PRINCETON explosion report
« Reply #3 on: July 28, 2009, 07:59:29 PM »
I'm going to post the links again here.  Somehow the links turned into images which on this board are shrunk enough so I can't read the text when they show up that way.  So you have it either way now.  If you really want legibility, of course, download the pages from the links and save them or print them out.

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook005.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook006.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook007.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook008.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook009.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook010.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook011.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook012.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook013.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook014.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook015.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook016.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook017.jpg

http://i17.photobucket.com/albums/b62/cannonmn/miscforumsetc/forums41/Malletbook018.jpg

Offline Cannoneer

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Re: PRINCETON explosion report
« Reply #4 on: July 29, 2009, 05:00:11 AM »
Thanks for reposting the links; they're a lot easier to read.
RIP John. While on vacation July 4th 2013 in northern Wisconsin, he was ATVing with family and pulled ahead of everyone and took off at break-neck speed without a helmet. He lost control.....hit a tree....and the tree won.  He died instantly.

The one thing that you can almost always rely on research leading to, is more research.

Offline cannonmn

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Re: PRINCETON explosion report
« Reply #5 on: July 29, 2009, 06:25:16 AM »
For those who don't want to read through the whole report, I'd summarize it this way:

"Peacemaker" was a wrought-iron gun, meaning it was made up of many smaller pieces of iron that should have been solidly welded together by heat and the impact of a 15,000 lb. forging hammer. The pieces the maker began with were typically 4 x 4-inch cross-section, eight feet long.

Franklin Institute concluded that basically the "Peacemaker" was made with iron of less-than-typical quality, and that many of the welds they examined were either very imperfect or nonexistant. They were able to pour oil through one area which was supposed to have been welded, and insert a wire through another. They also observed many instances where sizeable areas of either oxide or slag were present, preventing the separate pieces of iron from being joined as they should have been.

For those who read it, what other important conclusions should be mentioned?

Offline Double D

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Re: PRINCETON explosion report
« Reply #6 on: July 29, 2009, 08:32:21 AM »
John,

Sound like the typical issues of damascus barrels and welded seam tubing.

Offline Double D

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Re: PRINCETON explosion report
« Reply #7 on: July 29, 2009, 08:41:53 AM »
I'm going to post the links again here.  Somehow the links turned into images which on this board are shrunk enough so I can't read the text when they show up that way.  So you have it either way now.  If you really want legibility, of course, download the pages from the links and save them or print them out.
 

It looked to me as if you posted pictures and forgot to code them as images. So  coded them for you.  If you are concerned about the size restrictions on the board and post the links to pictures to work around the board restrictions make a note at the bottom of your post, so I wll leave things alone.

The restrictions on size are to speed the opening  of post especially for those still on dial up and to help those with older computers with the older narrow monitors to see the pictures without have to scroll right and left. 

Offline cannonmn

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Re: PRINCETON explosion report
« Reply #8 on: July 29, 2009, 09:09:52 AM »
Thanks DD, I kinda thought that's what happened but wasn't sure, next time I will include a DNFW notice at bottom. 

DNFW is a term I learned in a Navy technical course long ago-there was one adjustment screw on the Woodward governor that Navy personnel must not touch, and the instructors clearly labelled it as the DNFW screw.  If you did not remember this on the test you would fail.

Offline GGaskill

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Re: PRINCETON explosion report
« Reply #9 on: July 29, 2009, 09:13:50 AM »
This method of construction is basically the same as that used 10 years later for the Griffen gun and its successors, the various wrought iron rifles made by Phoenix Iron and referred to as Ordnance Rifles.  I think a major difference besides size is that Phoenix rolled their iron to weld it instead of hammering it, which seems like it would be a faster process.  The Phoenix wrought iron rifles had a well earned reputation for safety.

The Navy investigating board assigned no blame to Captain Stockton, and it would seem that he bore none for the construction flaws, but responsibility for bringing aboard the unproved gun and firing it in the presence of unprotected persons certainly can be laid at his feet.
GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”
--Winston Churchill

Offline Double D

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Re: PRINCETON explosion report
« Reply #10 on: July 29, 2009, 02:40:45 PM »
Thanks DD, I kinda thought that's what happened but wasn't sure, next time I will include a DNFW notice at bottom. 

DNFW is a term I learned in a Navy technical course long ago-there was one adjustment screw on the Woodward governor that Navy personnel must not touch, and the instructors clearly labelled it as the DNFW screw.  If you did not remember this on the test you would fail.

In the Marines we also had Do Not Fiddle With warnings....

Offline cannonmn

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Re: PRINCETON explosion report
« Reply #11 on: July 29, 2009, 03:40:44 PM »
Quote
In the Marines we also had Do Not Fiddle With warnings....

It's kind of hard to remember that far back, but I think in the Navy it stood for

"Do Not Foolaround With"

Offline Cannoneer

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Re: PRINCETON explosion report
« Reply #12 on: July 29, 2009, 05:03:07 PM »
No one has yet to mention that the Robert Mallett who authored this British study of artillery constuction, materials, and failures of pieces in service, is the same Robert Mallett (great Irish scientist, engineer and inventor) who designed the ingenious, and famous huge mortar (which was popularly known as "Mallett's Great Mortar") that the British had intended to bombard Sebastopol with in the Crimean War. I'm sure that a lot of members will remember that Tracy and Mike built a fine miniature of this unique mortar.

RIP John. While on vacation July 4th 2013 in northern Wisconsin, he was ATVing with family and pulled ahead of everyone and took off at break-neck speed without a helmet. He lost control.....hit a tree....and the tree won.  He died instantly.

The one thing that you can almost always rely on research leading to, is more research.

Offline Cannoneer

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Re: PRINCETON explosion report
« Reply #13 on: July 30, 2009, 10:10:11 AM »
One of Mallett's mortars, and the 36-inch shells that it was intended to fire, on display at Fort Nelson in England.



RIP John. While on vacation July 4th 2013 in northern Wisconsin, he was ATVing with family and pulled ahead of everyone and took off at break-neck speed without a helmet. He lost control.....hit a tree....and the tree won.  He died instantly.

The one thing that you can almost always rely on research leading to, is more research.

Offline cannonmn

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Re: PRINCETON explosion report
« Reply #14 on: July 30, 2009, 10:25:18 AM »
I'll try and find a photo I took of the Mallett mortar as displayed in Woolwich back in 1980's.  The artillerymen had set it up with two shells in front of the bed, underneath the muzzle, if you can imagine what that looked like.