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Technology Computing, programming, science, electronics, telecommunications, etc. |
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08-05-2015, 01:36 PM | #1 |
Junior Master Dwellar
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Ship building.
HMS Prince of Wales hull weighing 11,000 tonnes moves out dock hall.
An 11,000-tonne section of one of the Royal Navy's under-construction aircraft carriers has been moved out of its dock hall for the first time. The largest section of HMS Prince of Wales was driven out of the hall at the BAE Systems shipyard in Govan at 1mph using nearly 2000 wheels and a single remote control. Over the weekend the large hull section will be moved on to a barge, where it will remain until late August when it will set off on a sea journey around the north of Scotland and down to Rosyth in Fife for assembly. The Aircraft Carrier Alliance began construction work on the structure at Govan in December 2013. HMS Prince of Wales is the second Queen Elizabeth Class aircraft carrier being built for the Royal Navy. Its sister ship, HMS Queen Elizabeth, was the first to begin construction and could have jets flying off it by the end of 2018. Those behind the project, which is estimated to cost more than £6bn overall, say the QE Class will be the centrepiece of Britain's naval capability. Each 65,000-tonne aircraft carrier will provide the armed forces with a four-acre military operating base which can be deployed worldwide. The vessels are designed to be versatile enough to support war efforts or provide humanitarian aid and disaster relief. The Scotsman Now, I am neither a naval architect nor an engineer, but seeing the manner in which this vessel is being constructed gives rise to the suspicion that it is being built to a budget and not to a specification.. I assume that the sections will be bolted and welded together which must be a less than optimal solution. It surely will result in a hull that is weaker than one constructed by laying down a keel, building ribs and hot riveting steel plates to the basic structure. Anyway, that’s just my observations on the subject. You will probably find the BBC report somewhat more interesting. BBC
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08-05-2015, 01:43 PM | #2 |
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That is the way ships are built these days. The components are usually built closer to the ways.
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08-05-2015, 03:24 PM | #3 |
The future is unwritten
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Yes, keel+ribs+plates went out with sword fighting and knickers. During the Big One, WW II, the need for ships, and lot's of them, prompted US shipyards to build ships in sections, then join the sections together as drydock space became available.
Now big ships are a series of waterproof compartments joined together. Computer simulations verify the desired rigidity/flexibility for rough seas, plus damage control for various types of attacks. To build that carrier in one spot would take either many, many years, or a labor force so large they'd have to recruit around the empire. Then when you break the champagne bottle and wave bye-bye, what do you do with that huge labor force that resettled into that community? For that matter what happens to the community that expanded to accept the huge, now unemployed, labor force?
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08-05-2015, 04:48 PM | #4 |
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Just think about that poor Wheel#1005 in the center that needs to go pee.
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08-05-2015, 05:56 PM | #5 |
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No problem wheel #1005, like his bros, has a bladder that will hold probably 90 psi.
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08-05-2015, 06:20 PM | #6 | |
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The wiki article on building the WW II Liberty ships describes how the US redesigned the UK model, changing construction from riveted to welded plates and a different propulsion system eliminating the need for difficult to build reduction gears.
The welded plates became problematic, but was ironed out in later construction techniques post Liberty program. Quote:
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08-05-2015, 08:10 PM | #7 |
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08-05-2015, 08:22 PM | #8 |
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In addition, during WW II we built concrete ships because of steel shortages.
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08-05-2015, 10:32 PM | #9 | |
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from Wikipedia:
Quote:
Such was the beginnings of the Kaiser-Permanente Health Plans of today. |
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08-05-2015, 10:34 PM | #10 |
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Or he found there was more money in health care than shipbuilding.
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08-06-2015, 08:47 AM | #11 |
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Yeah, that was then, this is now.
The shipyards on the Columbia and Willamette River are now high-rise condo's and fitness centers. ... and the half-life of the fitness clubs is about 7 months. |
08-06-2015, 12:18 PM | #12 |
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There were several shipyards on the Delaware River in Philly and Camden, NJ, as well as a big Navy base. All gone now.
Now both sides of the river, down as far as Wilmington, DE, are huge refrigerated warehouses that unload billions of bananas, and other tropical fruits, for distribution up and down the East coast. Just one, Penn Terminal, moves 260,000 tons of bananas annually.
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08-25-2015, 12:45 PM | #13 |
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Ten and two it is, then.
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08-25-2015, 01:07 PM | #14 |
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You would think with $10B, they would be able to afford something other than duct tape to secure it. Hmm. Although, maybe that's military grade duct tape.
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08-25-2015, 01:21 PM | #15 | |
Junior Master Dwellar
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Quote:
Well, it's only the Great British Taxpayer who'll pay for it.
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