电船公司即将交付第三批次的弗吉尼亚级攻击潜艇，增强导 ...

根据dodbuzz网站的报道
电船公司将于4月份像美国海军交付Block III的弗吉尼亚级SSN 北达科塔号，比预定计划提前了数个月。
第三批次的弗吉尼亚级SSN一共八艘，国会已同意拨款140亿的建造费用。
比起前2个批次，第三批次的改进在于声纳和战斧发射单元。
原来的发射管是12个，每个发射管直径21英寸，现在的新发射系统采用两个87英寸直径的发射管，每管可载6枚战斧，并可以发射其他类型的导弹和载荷。
原始报道如下：
http://www.dodbuzz.com/2014/01/2 ... lock-iii-submarine/
Groton, Conn. – While floating partially submerged in icy waters along a dock at a General Dynamics’ Electric Boat facility here, the Navy’s first Block III Virginia-Class attack submarine is being readied for sea-trials, certifications and delivery.

As a key step prior to formally handing the boat over to the Navy to begin service, Electric Boat engineers and Navy professionals are testing the electronics, wiring, missile tubes and propulsion system on-board the submarine, among other things, said Kurt Hesch,  vice president of Virginia-Class submarines, Electric Boat.

The USS North Dakota, the first Block III Virginia-Class submarine slated for delivery, is expected to be handed over to the Navy for service by April of this year.  An April or May delivery is several months in advance of its contracted arrival in August, Navy and Electric Boat officials said.
“The fact we’re delivering early to the contract delivery date demonstrates we did the re-design right, something clearly demonstrated in North Dakota’s bow taking two fewer months and 8,000 fewer mandays to build than the previous ship, USS Minnesota,” Capt. Dave Goggins, program manager,  Virginia-Class submarines told Military​.com in a written statement.

Christened in November, the USS North Dakota will be the first of eight Block III Virginia-Class boats delivered to the Navy, submarines engineered with a series of technological upgrades and innovations compared to earlier Blocks I and II boats, Navy officials said. Blocks I and II, totaling 10 ships, have already been delivered to the Navy.

All eight Block III boats are being built under a $14 billion Navy deal with General Dynamics’ Electric Boat in December of 2008.

Hesch and Navy officials explained that the sea trials involve three phases. They begin with an alpha-phase which assesses the ship’s ability to dive to depth and conduct emergency surfacing operations. The alpha trials also assess the submarines propulsion plant and many of the technologies.

The bravo-phase tests the acoustics and combat systems and looks to correct any problems, followed by the Navy Board of Inspection and Survey trials where an independent board comes to inspect the boat prior to certification. The idea is to identify and address any potential issues with the boat well before it enters service with the Navy.

“The first trial is very rigorous. We are making sure we understand the water tightness and ensuring we understand the propulsion capabilities and understand the emergency systems are working. We take these incremental steps to make sure it is a fully functional and safe ship,” Hesch said in an interview with Military​.com

Sea trials can last anywhere for eight to 12 weeks depending upon what issues are discovered, Hesch said.

There is a lot of testing that can only happen once the ship is underwater, such as an assessment of the nuclear-reactor, propulsion plant and dive and stern planes, Hesch explained.

“You start off going to a shallow depth to make sure everything is good, then you kind of work your way through the systems, making sure the propulsion plant is working the way it should,” he said.

The sea trials will assess everything from the sonar systems and missile tubes to on-board electronics, command and control technologies, navigation systems, sensors and submarine computer systems.

“We know what we want to test. We go out there and it is a very carefully orchestrated agenda that we follow without waiver,” said Michael Nowak, USS North Dakota ship manager, Electric Boat.

Nowak said his crew will assemble the requisite repair materials and mechanics in the event that sea trials reveal the need for changes. Some of the dockside testing includes shooting launch vehicles from torpedo tubes in order to verify that the launch lines are completed and ready, Nowak added.

The Block III subs, now under construction, are being built with new so-called Virginia Payload Tubes designed to lower costs and increase missile-firing payload possibilities, Navy officials explained.

Instead of building what most existing Virginia-class submarines have — 12 individual 21-inch in diameter vertical launch tubes able to fire Tomahawk missiles — the Block III submarines are being built with two-larger 87-inch diameter tubes able to house six Tomahawk missiles each.

While primarily done to lower costs for the boat, this technical change will allow the possibility of future missiles and off-board sensors to be launched from the tubes, Navy officials said.

All Virginia-Class submarines are also engineered with a computerized fly-by-wire touchscreen control system wherein boat operators use a joystick to navigate, unlike the mechanical hydraulic controls uses on prior models.

The Block III boats also have a Large Aperture Bow array which places a conformal sonar system in the bow of the boat, Hesch said.
此外，第四批次的SSN774也在规划中
第四批次预计建造10条，将改进作战系统，采用更新的分仓，能发射40枚战斧根据dodbuzz网站的报道
电船公司将于4月份像美国海军交付Block III的弗吉尼亚级SSN 北达科塔号，比预定计划提前了数个月。
第三批次的弗吉尼亚级SSN一共八艘，国会已同意拨款140亿的建造费用。
比起前2个批次，第三批次的改进在于声纳和战斧发射单元。
原来的发射管是12个，每个发射管直径21英寸，现在的新发射系统采用两个87英寸直径的发射管，每管可载6枚战斧，并可以发射其他类型的导弹和载荷。
原始报道如下：
http://www.dodbuzz.com/2014/01/2 ... lock-iii-submarine/
Groton, Conn. – While floating partially submerged in icy waters along a dock at a General Dynamics’ Electric Boat facility here, the Navy’s first Block III Virginia-Class attack submarine is being readied for sea-trials, certifications and delivery.

As a key step prior to formally handing the boat over to the Navy to begin service, Electric Boat engineers and Navy professionals are testing the electronics, wiring, missile tubes and propulsion system on-board the submarine, among other things, said Kurt Hesch,  vice president of Virginia-Class submarines, Electric Boat.

The USS North Dakota, the first Block III Virginia-Class submarine slated for delivery, is expected to be handed over to the Navy for service by April of this year.  An April or May delivery is several months in advance of its contracted arrival in August, Navy and Electric Boat officials said.
“The fact we’re delivering early to the contract delivery date demonstrates we did the re-design right, something clearly demonstrated in North Dakota’s bow taking two fewer months and 8,000 fewer mandays to build than the previous ship, USS Minnesota,” Capt. Dave Goggins, program manager,  Virginia-Class submarines told Military​.com in a written statement.

Christened in November, the USS North Dakota will be the first of eight Block III Virginia-Class boats delivered to the Navy, submarines engineered with a series of technological upgrades and innovations compared to earlier Blocks I and II boats, Navy officials said. Blocks I and II, totaling 10 ships, have already been delivered to the Navy.

All eight Block III boats are being built under a $14 billion Navy deal with General Dynamics’ Electric Boat in December of 2008.

Hesch and Navy officials explained that the sea trials involve three phases. They begin with an alpha-phase which assesses the ship’s ability to dive to depth and conduct emergency surfacing operations. The alpha trials also assess the submarines propulsion plant and many of the technologies.

The bravo-phase tests the acoustics and combat systems and looks to correct any problems, followed by the Navy Board of Inspection and Survey trials where an independent board comes to inspect the boat prior to certification. The idea is to identify and address any potential issues with the boat well before it enters service with the Navy.

“The first trial is very rigorous. We are making sure we understand the water tightness and ensuring we understand the propulsion capabilities and understand the emergency systems are working. We take these incremental steps to make sure it is a fully functional and safe ship,” Hesch said in an interview with Military​.com

Sea trials can last anywhere for eight to 12 weeks depending upon what issues are discovered, Hesch said.

There is a lot of testing that can only happen once the ship is underwater, such as an assessment of the nuclear-reactor, propulsion plant and dive and stern planes, Hesch explained.

“You start off going to a shallow depth to make sure everything is good, then you kind of work your way through the systems, making sure the propulsion plant is working the way it should,” he said.

The sea trials will assess everything from the sonar systems and missile tubes to on-board electronics, command and control technologies, navigation systems, sensors and submarine computer systems.

“We know what we want to test. We go out there and it is a very carefully orchestrated agenda that we follow without waiver,” said Michael Nowak, USS North Dakota ship manager, Electric Boat.

Nowak said his crew will assemble the requisite repair materials and mechanics in the event that sea trials reveal the need for changes. Some of the dockside testing includes shooting launch vehicles from torpedo tubes in order to verify that the launch lines are completed and ready, Nowak added.

The Block III subs, now under construction, are being built with new so-called Virginia Payload Tubes designed to lower costs and increase missile-firing payload possibilities, Navy officials explained.

Instead of building what most existing Virginia-class submarines have — 12 individual 21-inch in diameter vertical launch tubes able to fire Tomahawk missiles — the Block III submarines are being built with two-larger 87-inch diameter tubes able to house six Tomahawk missiles each.

While primarily done to lower costs for the boat, this technical change will allow the possibility of future missiles and off-board sensors to be launched from the tubes, Navy officials said.

All Virginia-Class submarines are also engineered with a computerized fly-by-wire touchscreen control system wherein boat operators use a joystick to navigate, unlike the mechanical hydraulic controls uses on prior models.

The Block III boats also have a Large Aperture Bow array which places a conformal sonar system in the bow of the boat, Hesch said.
此外，第四批次的SSN774也在规划中
第四批次预计建造10条，将改进作战系统，采用更新的分仓，能发射40枚战斧