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[水面舰艇] 首艘国产航母001A型航空母舰专题:2017年4月26日下水

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lemoncap 发表于 2015-10-27 18:36 | 显示全部楼层
spacedog 发表于 2015-10-26 10:40
Officials were quick to call this a "minor setback" and express confidence that EMALS will be oper ...

美国海军相关官员能公开对记者说没有信心吗? 

事实是福特的服役期限现在看已经推迟到2017年,估计还会再推。着陆系统电磁部分问题更大。

CVN-77 布什号下水到服役两年三个月,比较一下看看到底是否有问题。
lemoncap 发表于 2015-10-27 19:13 | 显示全部楼层
“福特”的电磁弹射系统到现在也还没有再公开测试,福特号已经弹射了的最大重量是7吨到140节,布什号蒸汽弹射器测试的是30多吨。大伙自己判断有无问题
lemoncap 发表于 2015-10-27 19:25 | 显示全部楼层
本帖最后由 lemoncap 于 2015-10-27 19:40 编辑

值得注意的是这些最近的延迟之前,已经有多次退后:

Launch of Navy's newest aircraft carrier delayed
May. 6, 2013 - 06:00AM

WASHINGTON — The launch of the aircraft carrier Gerald R. Ford has been moved back from July to November, a consequence of production delays identified two years ago.

The move comes weeks after the Navy and shipbuilder Newport News Shipbuilding moved the ship’s delivery from September 2015 — which has been the contracted date for some years — to early 2016.

“We've been tracking and reporting schedule risk for several years and actively working to retire that risk,” Chris Johnson, a spokesman for Naval Sea Systems Command (NAVSEA) said May 7 in an email. “Following a detailed review of the schedule in February 2013, the Navy and the shipbuilder concluded that a delay in the launch would allow the shipbuilder to complete the remaining critical path work and allow for increased outfitting to most economically complete the ship.”

Earlier, Johnson acknowledged the problems associated with the first ship of a new design.

“Certainly it’s not ideal, but in this case it is very much a first-of-class issue. And those ships have challenges.”

The Ford is the first of the CVN 78-class carriers, the first newcarrier design since the mid-1960s. The 100,000-ton ships — the largest warships in the world — are also the first to be entirely designed using computer-aided design technologies.

Newport News Shipbuilding, a division of Huntington Ingalls Industries, is the only shipbuilder in the world capable of building full-sized nuclear-powered aircraft carriers.

The shipbuilder, in a statement released Monday, acknowledged its problems in making up the schedule delays. HII’s statement in full:

“Working closely with the Navy, we have revised the Gerald R. Ford (CVN 78) launch date from July 2013 to November 2013. Although actions to resolve first-of-class issues have retired significant schedule risks, the revised launch date allows increased outfitting and ship construction that are most economically done prior to ship launch.

“As the first new design carrier beginning construction in more than 40 years, CVN 78 is designed to provide increased capability and reduced total ownership cost by about $4 billion compared to Nimitz-class carriers. For this first-of-class ship, construction commenced in parallel with design completion based on earlier decisions at [the] Department of Defense. Ongoing design during the construction process caused delay and inefficiencies in procurement, manufacturing, and assembly.

“We have demonstrated that delaying launch (and therefore delivery) to allow for increased outfitting and construction prior to launch is the most economical path forward to deliver the tremendous capability and affordability improvements resident in Ford. “

NAVSEA also released a statement on the shift in launch date:

“The CVN 78 launch date will be revised from July 2013 to November 2013, and delivery will be shifted to second quarter FY 2016. Although shipbuilder actions to resolve first-of-class issues have retired significant schedule risks to launch and stabilized schedule performance, they have not been able to overcome the 17 weeks of schedule pressure identified two years ago.

“The Navy and the shipbuilder concluded last month that a delay in the launch would allow the shipbuilder to complete the remaining critical path work and allow for increased outfitting to most economically complete the ship. The ship is expected to be 70 percent complete at launch, well prepared for subsequent shipboard testing.

“Ongoing design and new technology development during the construction process caused delays in material procurement, manufacturing and assembly.

“First-of-class producibility issues [that impacted the schedule included] the use of thinner steels which caused difficulties with structural erection; new processes for advanced coating systems; and qualification of new material components. The shipbuilder recommended a delay in launch in order to accomplish greater completion levels prior to launch and thereby enable the lead ship to be completed most economically. The Navy agreed.

“As reported by the Navy previously in its December 2011 CVN 78 Selected Acquisition Report, the Navy projects a most likely total ship end cost of $12.887 billion. This includes the cost of construction, government furnished equipment, and design funding of $3.3 billion for non-recurring engineering which is the investment in the 11 ship class design (not just the lead ship of the class, CVN 78). Current shipyard construction cost estimates are consistent with this Navy estimate from 2 years ago.”
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按三年前的计划,现在福特航母都应该服役一个月了:)
同时注意电磁弹射器的设计和制造是在2009年铺龙骨之前的2005年就开始了。 所以不是计划不周全的问题,而是实实在在的的技术问题。


lemoncap 发表于 2015-10-27 19:42 | 显示全部楼层
本帖最后由 lemoncap 于 2015-10-27 19:43 编辑

Multibillion-Dollar Contract Awarded For New Carrier Due In 2015
Inside the Navy, September 15, 2008
By Zachary M. Peterson
The Navy last week awarded Northrop Grumman a $5 billion contract for the detail design and
construction of the service’s next-generation aircraft carrier, the Gerald R. Ford (CVN-78), slated
for a 2015 delivery, a date the company’s program manger is confident will be met.
In 2005, the Navy gave a separate $2.7 billion contract for advance construction on the new
carrier. The full contract comes in advance of the keel laying planned for next year.
The new class of carriers, of which Ford will be the first, feature new nuclear-propulsion and
electrical plant designs, electromagnetic catapults instead of steam, advanced arresting gear and
new integrated warfare systems.
The Electromagnetic Aircraft Launch System (EMALS) is perhaps the most challenging new
system on the carrier. In November 2007, the Navy announced EMALS, manufactured by
General Atomics, had passed a critical design review. In April, the first full-size test motor
generator completed factory acceptance testing.

Of the carrier’s 21 new technologies, EMALS is one of three that “present the greatest risk to the
ship’s cost and schedule,” according to a March Government Accountability Office report titled
“Defense Acquisitions: Assessments of Selected Weapon Programs.” Problems with developing
the motor generator delayed the program by several months, as testing was scheduled to start in
February 2008. To keep up with the CVN-78’s construction schedule, the Navy had considered
delivery of EMALS before completing testing, an idea the GAO also took issue with.
“We’re working very closely with the Naval Sea Systems Command and Naval Air Systems
Command and the subcontractor General Atomics to ensure that we understand all issues and
risks associated with [EMALS] and we’re working with them to meet the ship’s schedule,” Mike
Shawcross, vice president for the Ford-class carrier program at Northrop Grumman Shipbuilding,
told Inside the Navy Sept. 10 after the contract was announced.
The Ford and the follow-on carrier, CVN-79, mark the first new aircraft carrier design since the
Nimitz-class carriers of the 1960s. The new technologies aboard the ship and the new design will
allow the Navy to save costs over the lifetime of the carrier, according to Capt. Brian Antonio, the
Navy’s program manager for CVN-78.
“These improvements provide transformational warfighting capabilities and enable reduced
manning, ultimately reducing the total ownership cost of each Ford-class carrier by approximately
$5 billion over the life of the ship,” Antonio said in a Sept. 10 statement.
More than 80 percent of the design of the new carrier is complete in computer modeling,
Shawcross said.
“In about 2010 the product model will be complete,” he added.
lemoncap 发表于 2015-10-27 19:46 | 显示全部楼层
本帖最后由 lemoncap 于 2015-10-27 19:51 编辑

Story Number: NNS040406-12Release Date: 4/7/2004 3:07:00 AM
From Naval Air Systems Command Lakehurst Public Affairs
LAKEHURST, N.J. (NNS) -- General Atomics was awarded a System Development and Demonstration (SDD) contract April 2 that will include the design, fabrication, delivery, integration, test and support of one full scale, full length, shipboard representative Electromagnetic Aircraft Launch System (EMALS) for NAVAIR Lakehurst, at the Naval Air Engineering Station Lakehurst, N.J.

General Atomics, based in San Diego, will have its equipment installed at Lakehurst by 2006 and conduct testing in 2007-2008.

"The contract, valued at (more than) $145 million, is the final step in a multi-phase research and development acquisition program to replace the current steam catapults used on aircraft carriers to launch aircraft from their decks. EMALS will be installed on the CVN-21 future class of carriers that is currently scheduled to be at sea by 2014," according to George Sulich, EMALS team leader.

The present steam catapults are large, heavy, energy inefficient, manpower intensive and dependant on steam provided by the ship's engineering plant. EMALS is intended to be inherently more survivable, provide better performance, be less manpower intensive and have a lower life cycle cost than steam catapults. EMALS will be capable of launching all conventional and short takeoff fixed wing carrier aircraft currently projected for the Navy inventory through 2030, including the Joint Strike Fighter. The goal is to be capable of launching all future aircraft projected in the inventory through 2050.

The EMALS land based support facility is to be constructed by Hensel Phelps Construction Co., of Aurora, Co. and is expected to be completed by December 2005. That contract is in the amount of $20.5 million. It will include building the infrastructure, supporting buildings and related utilities for the EMALS program.

"This new EMALS support facility in Lakehurst will serve the Navy for many years to come," said Sulich. "It will be used to test and evaluate future EMALS modifications, as well as test and evaluate both upgraded aircraft and completely new aircraft that may be used in the future."

For related news, visit the NAVAIR - Naval Air Systems Command Navy NewsStand page at www.news.navy.mil/local/navair.
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按2004年的规划,福特级已经服役一年多了。哈哈,看看什么叫坑爹。
lemoncap 发表于 2015-10-27 20:07 | 显示全部楼层
spacedog 发表于 2015-10-26 10:33
The Navy charged
General Atomics with building a system in which each of the four catapults on th ...

“另外,体积似乎也超标了,这个以前似乎没有人想到。”

只能说负责审查的官员没有基本的工业技术常识。 同样功率下电动机重还是内燃机、蒸汽轮机重?同样功率下发电机+电动机体积大还是齿轮箱体积大?

ssizz 发表于 2015-10-27 20:35 | 显示全部楼层
lemoncap 发表于 2015-10-27 18:36
美国海军相关官员能公开对记者说没有信心吗? 

事实是福特的服役期限现在看已经推迟到2017年,估 ...

跟布什号不能比
丫还没试航就服役了
lemoncap 发表于 2015-10-27 20:38 | 显示全部楼层
spacedog 发表于 2015-10-26 10:33
The Navy charged
General Atomics with building a system in which each of the four catapults on th ...

再读了一下:
"The Navy charged
General Atomics with building a system in which each of the four catapults on the carrier
weighed 530 tons. Yet each launcher being produced was about 100 tons overweight, making
the total system 400 tons overweight. “ 
肯定是计划重量是530吨的意思。如果计划重量是430吨,就会说”The Navy charged
General Atomics with building a system in which each of the four catapults on the carrier
weighed 430 tons“

charge somebody with doing something 这里是 让某某做某事的意思,而不是控诉、起诉某某做了某事。 因为海军没有和通原打这个官司。

从重量来看630吨的总重很符合,因为光是储能部分就重400吨。
lemoncap 发表于 2015-10-27 20:40 | 显示全部楼层
本帖最后由 lemoncap 于 2015-10-27 21:02 编辑
ssizz 发表于 2015-10-27 20:35
跟布什号不能比
丫还没试航就服役了

里根号如何? 下水到服役两年四个月;或者杜鲁门号? 下水到服役一年零十个月 还包括海试。铺龙骨到服役总共4年8个月。或者企业号,世界头个核动力航母,铺龙骨到服役总共3年9个月
zhyuli 发表于 2015-10-28 13:31 | 显示全部楼层
lemoncap 发表于 2015-10-27 18:01
"2   枪特么就是垃圾,弟兄们换大刀上吧......   "

2 是你的选择之一,难道不是?

一切以你喜欢不喜欢为标准,喜欢的就是神器,不喜欢的就是垃圾,你的世界观真是奇葩啊......   还好你不是燧发枪和火绳枪的粉丝......  
 楼主| zhh894217 发表于 2015-10-28 21:26 | 显示全部楼层
klonoa1121 发表于 2015-10-26 20:49
http://lt.cjdby.net/thread-2092271-1-1.html

建造大概进度,机库分段位置不好表明


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 楼主| zhh894217 发表于 2015-10-28 21:30 | 显示全部楼层
比照舰载机训练基地的线图,飞行甲板基本就是把辽宁舰甲板三个角的舷台和甲板填平


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lemoncap 发表于 2015-10-30 04:43 | 显示全部楼层
zhyuli 发表于 2015-10-28 13:31
一切以你喜欢不喜欢为标准,喜欢的就是神器,不喜欢的就是垃圾,你的世界观真是奇葩啊......   还好你不 ...

一切以性能(体积、重量、可靠性)和进度为判断的准绳。已经说明了问题。
zhyuli 发表于 2015-10-30 07:18 来自航空航天港手机版! | 显示全部楼层
zhh894217 发表于 2015-10-28 21:30
比照舰载机训练基地的线图,飞行甲板基本就是把辽宁舰甲板三个角的舷台和甲板填平

我关心两条,舰桥有没有缩小,机库有没有放大
spacedog 发表于 2015-10-30 09:54 | 显示全部楼层
zhyuli 发表于 2015-10-30 07:18
我关心两条,舰桥有没有缩小,机库有没有放大

舰桥为什么不能采取架空(实际是部分架空)的结构呢?这样也可以部分增加甲板操作空间啊
uiopuiop 发表于 2015-10-30 11:13 | 显示全部楼层
甲板面积略大于大辽,能多放三架机
zhyuli 发表于 2015-10-30 12:13 | 显示全部楼层
spacedog 发表于 2015-10-30 09:54
舰桥为什么不能采取架空(实际是部分架空)的结构呢?这样也可以部分增加甲板操作空间啊

苏俄系航母,空中前置指挥能力太差,母舰负担很重,001A可以讨巧的地方无法是相关设备的体积可以小很多而已,但是估计舰桥整体还是很大,而且依然维持单塔结构......  
klonoa1121 发表于 2015-11-1 19:26 | 显示全部楼层
http://lt.cjdby.net/thread-2095357-1-1.html
上了第二个机库分段

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不橘不枳 发表于 2016-1-15 21:55 | 显示全部楼层
今年年中下水基本无悬念。
luritie 发表于 2016-2-5 21:59 | 显示全部楼层
I eagerly awaits the launch
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