Looking at the drawings of the Iowa-class ships, it seems that abreast of turret 1, the torpedo protection system is not as deep as other parts of the ship? Are the powder magazines of the ship directly next to the last holding bulkhead (BHD #4)? It seems pretty dangerous for the torpedo system to thin right by the magazines.
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Originally posted by Radical View PostLooking at the drawings of the Iowa-class ships, it seems that abreast of turret 1, the torpedo protection system is not as deep as other parts of the ship? Are the powder magazines of the ship directly next to the last holding bulkhead (BHD #4)? It seems pretty dangerous for the torpedo system to thin right by the magazines.Able to leap tall tales in a single groan.
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Thought of this thread today after reading a story about the USS Porter "Willie Dee" where the author takes huge literary license to talk about how that one torpedo launched almost sunk and killed FDR. Talk about a glass jaw...:)
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Originally posted by tbm3fan View PostThought of this thread today after reading a story about the USS Porter "Willie Dee" where the author takes huge literary license to talk about how that one torpedo launched almost sunk and killed FDR. Talk about a glass jaw...:)
Even Delano Roosevelt (FDR's grandson) who has worked with us and is a founding member of the Pacific Battleship Center laughs about it every time the incident is brought up.
Seriously, however, if the torpedo hit the side of the ship just below where FDR was looking over the life rails, that geyser of water would certainly have done unimaginable harm to him.Able to leap tall tales in a single groan.
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Originally posted by Radical View PostLooking at the drawings from the Booklet of General Plans, it seems like Missouri's torpedo holding bulkheads are 3/4" but the New Jersey is 5/8"? Why did the thickness increase for Missouri?
During modernization I added 1/4" to 1/2" HY-80 armor on top of existing 1" STS armor. New deck houses were built of 3/4" to 1" thick HY-80 armor. We converted a barracks compartment into a communication center and added 1" thick HY-80 armor over the existing 1/4" to 3/8" bulkhead and deck plating. The new Combat Engagement Center gave me a bit of challenge as I added 1 1/2" thick HY-80 armor to outer bulkheads that did not have a continuous deck to support their weight. Don't forget, 1 1/2" thick steel weighs 61.2 lbs per square foot. Just imagine our riggers and shipfitters hulking in a 5-foot wide by 7 1/2 foot tall plate of armor steel weighing 2,142 lbs -- EACH.
Just another day doing our job.Able to leap tall tales in a single groan.
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Originally posted by Radical View PostWas the original 5/8" torpedo holding bulkheads not enough for something? I was under the impression that you don't want your bulkheads to be too stiff or thick to prevent rupture, and some compartments are liquid loaded as well.
Besides, on warships the thicker steel is better. BUT, you must also design the ship to still be able to float. If you use too much heavy steel for strength and/or armor, it would soon become an anchor.Able to leap tall tales in a single groan.
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Originally posted by RustyBattleship View PostBelieve it or not, 3/4" thick steel is cheaper by the square foot than 5/8" still. To squeeze down that extra 1/8" takes another heating of the plate to reset the rollers for the lesser thickness.
Besides, on warships the thicker steel is better. BUT, you must also design the ship to still be able to float. If you use too much heavy steel for strength and/or armor, it would soon become an anchor.
By the way, how is the upper and lower belt of the Iowa attached?
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Originally posted by RustyBattleship View PostThe Iowa and New Jersey were designed to stay within the weight limits of the London Treaty. When we discovered that the German Bismarck class and the Japanese Yamato class totally ignored the treaty. Monkey see, Monkey do. Our enemies did not follow the Treaty so we didn't have to either. Therefor the holding bulkheads, the splinter deck and 40mm guntubs were all increased in thickness from 5/8" to 3/4" (or more in some cases) for the Missouri and Wisconsin.
During modernization I added 1/4" to 1/2" HY-80 armor on top of existing 1" STS armor. New deck houses were built of 3/4" to 1" thick HY-80 armor. We converted a barracks compartment into a communication center and added 1" thick HY-80 armor over the existing 1/4" to 3/8" bulkhead and deck plating. The new Combat Engagement Center gave me a bit of challenge as I added 1 1/2" thick HY-80 armor to outer bulkheads that did not have a continuous deck to support their weight. Don't forget, 1 1/2" thick steel weighs 61.2 lbs per square foot. Just imagine our riggers and shipfitters hulking in a 5-foot wide by 7 1/2 foot tall plate of armor steel weighing 2,142 lbs -- EACH.
Just another day doing our job.
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Originally posted by Radical View PostCuriously the Booklet of General Plans (https://maritime.org/doc/plans/bb63.pdf) for Missouri shows splinter deck of only 25# STS, which is 5/8". Do shipbuilders not follow these explicitly sometimes?
Fast forward a few years as various different alterations are made to each ship, the differences begin to increase and begin to multiply as differences between two ships force what should be an identical equipment installation to be installed differently in almost every ship. Makes configuration management a nightmare.
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