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Ed		#11	[-]
Posts: 2302 (29-Apr-2008 02:42:32) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Fermi2 wrote: -------------------------------------------------------------------------------- Probably 3 to 4 hours. Usually USN Boilers are limited to less than 100 F/Hr heatup rate to protect the tubes. I'd have to look in PINE as it has the recommended heatup rates for USN Boilers. Mike Thanks, Mike. I didn't know there was a normal heat up rate, but it does make sense. I would guess that in wartimes, this limit was ignored? jlyons97 wrote: ---------------------------------------------------------------------------------- like all the BBs moored to the "F" moorings at Ford Island on The Day, one is already steaming at least one boiler supplying hotel services. Inter alia, the other boilers are under a steam blanket and thus already warm to a degree. The time line thus to get a main engine(s) warmed up is shorter - note Nevada's performance. I don't know the details, but suspect she was moved on one boiler, with the others lit off and building up to operating pressure. Had she sortied I am guessing she would be ready to answer all bells within the hour. That would explain Nevada's brave attempt to break free of the harbour. How are these steam blankets used (installed on hot boilers)? How long can they keep a boiler warm? What do they look like?
jlyons97		#12	[-]
Posts: 1453 (29-Apr-2008 03:57:06) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	"That would explain Nevada's brave attempt to break free of the harbour. How are these steam blankets used (installed on hot boilers)? How long can they keep a boiler warm? What do they look like?" All the BBs were in the same engineering state as Nevada, but because of her solo mooring, she was able to get underway with less effort. The other outboard battleships (Oklahoma, West Virginia, California, and in the case Arizona even thought she was inboard Vestal, were encumbered as it were). The term 'steam blanket' refers to low pressure steam applied to a non-steaming boiler, primarily to keep out oxygen. One by-product is the boiler so treated is 'warm.' Not to operating temperature, but warmer than ambient. Again, a 'cold' boiler on a ship where at least one other was being fired, had available a low pressure/low temperature supply of steam that was admitted to the nominally 'cold' boilers. This was not necessarily done to keep them ready get to operational temp/pressure faster, but rather to keep out oxygen. Oxygen in boilers (more properly the water in the boilers) led to tube pitting and other nasty things to avoided if possible.
Ed		#13	[-]
Posts: 2303 (29-Apr-2008 04:19:38) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Thanks jlyons97.
Gene Slover		#14	[-]
Posts: 6234 (29-Apr-2008 04:35:16) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	If you will read the action reports of the ships at PH you will find that a few DD's besides Nevada raised steam in 15 minutes. All of these ships run on steam and when tied up at the dock they are receiving steam from shore. If tied up in a nest one ship has one boiler fired to supply the rest of the nest. Its not a recommended way to lite off but it can be done in an emergency and PH was an emergency at the time. So if you have available live steam you can heat and lite off one boiler in about 15 minutes. One boiler will get you underway and depending on if you have a boiler room and engine room crew for more than one boiler room and engine room then you have a few options.
Gene Slover		#15	[-]
Posts: 6235 (29-Apr-2008 04:36:19) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Also you cut loose with fire axes.
BOBC 59		#16	[-]
Posts: 1149 (29-Apr-2008 06:59:28) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Well sop on Mamie what eva fireroom is the hot one u have one on stand-by if nessasary one boiler can and will suply nuff steam at operating pressure for two engines the stand-by can be online in about 10 mins @ war time rules can be and were bent to the breaking point and beyond, dont forget during war time we were never cold, other than in dry dock! always had at least 2 jacking gears engaged also, while on the hook the many master links in the chain one is in the shackel meaning all the boats had to do was knock the link apart and the chain and ship was severed fire axe not good on anchor chain Gene! in essence a BB or any other ship could be underway really really quick just a matter of mins all this is in war time time NUFF SAID For those that fought for it,Freedom has a taste and meaning ,The protected will never know.
Mike G	Nevada steaming condition at Pearl Harbor	#17	[-]
Posts: 261 (29-Apr-2008 09:33:08) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	I checked into Walter Lord's book "Day of Infamy" and the Nevada's steaming conditions are discussed. The book says; "A battleship needed two and one half hours to get up steam, four tugs to turn and pull her into the stream, a captain to handle. a captain to handle the whole intricate business. Yet here was the Nevada--steam up in 45 minutes, pulling away without tugs, and no skipper at all. How could she do it? She had certain advantages. It might normally take two and one half hours to get up steam, but two of her boilers were already hot. One was the boiler that normally provides power for a ship at her mooring. Ensign Taussig had lit a second boiler during the last peacetime watch, planning to switch the steam load later. Now his efficiency paid off. Both boilers had plenty of steam--giving Nevada 90 minutes' jump in getting away. Hard work in the fire room made up the difference."
jlyons97		#18	[-]
Posts: 1454 (29-Apr-2008 13:44:14) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Gene Slover wrote: If you will read the action reports of the ships at PH you will find that a few DD's besides Nevada raised steam in 15 minutes. All of these ships run on steam and when tied up at the dock they are receiving steam from shore. If tied up in a nest one ship has one boiler fired to supply the rest of the nest. Its not a recommended way to lite off but it can be done in an emergency and PH was an emergency at the time. So if you have available live steam you can heat and lite off one boiler in about 15 minutes. One boiler will get you underway and depending on if you have a boiler room and engine room crew for more than one boiler room and engine room then you have a few options. Gene, Not sure what you mean by 'raise steam.' Yes certainly a boiler can be lit off in 15 minutes, but ready to cut in on the main steam line and operate the engines and generators? No. It is possible for one ship to steam the nest, but it was not a universal truth, especially if one or more were scheduled to get underway in one or two days - it would not be worth the trouble. Besides, all the one steaming 'nester' can supply is low pressure steam, not the main steam necessarily to roll an SSTG; there is no way to get the higher pressure steam off the ship. So, unless the steamer is also supply electricity (a challenge for more than the adjacent ship(s) the others are going to be dark. All of the DDs in Pearl were pre-Benson/Livermore classes and they lacked the emergency diesel power of the later wartime classes. Run the gyro and IC switchboard was about all they were up to in that regard. If by '15 minutes' you mean underway on one boiler that was already on the line supplying an SSTG, then we're on the same sheet of music.
Craiglxviii		#19	[-]
Posts: 83 (29-Apr-2008 21:29:03) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	SeaTurtle, I know that Canopus fired the opening rounds of the engagement, from A turret, salvoes landing about 9000 yards short of Gneisenau, including several practice rounds if I remember correctly. Apologies- yes I know Bristol didn't get going until later on- those boilers don't reassemble themselves! Hoist40- all the sources I have read state specifically that the squadron were at 24hrs notice to raise steam, which is why Bristol had one of her boilers partially disassembled for decoking the tubes. They were in process of coaling- some ships had coaled and others, including the 2 BC's and Kent, had not. I'm not sure if I'm correct in this, but I have heard that some ships would extinguish all furnaces before coaling due to the risk of explosion from coal dust. If that is correct, it would be no surprise that the squadron had boilers cold. Sir Humphrey: Minister, Britain has had the same foreign policy objective for at least the last 500 years: to create a disunited Europe. In that cause we have fought with the Dutch against the Spanish, with the Germans against the French, with the French and Italians against the Germans, and with the French against the Germans and Italians. Divide and rule, you see. Why should we change now when it's worked so well?
Ed		#20	[-]
Posts: 2306 (29-Apr-2008 22:20:19) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	BOBC 59 said: "Well sop on Mamie what eva fireroom is the hot one u have one on stand-by if nessasary one boiler can and will suply nuff steam at operating pressure for two engines the stand-by can be online in about 10 mins @ war time rules can be and were bent to the breaking point and beyond, dont forget during war time we were never cold, other than in dry dock!" Thanks BOBC. So you guys aboard Massachusetts could actually get under way in as little as 10 minutes, cutting all lines and hoisting the anchor?

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