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Thread: Advanced Gun System

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    Purveyor of intelligent reading material Lt-Col A. Tack's Avatar
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    Default Advanced Gun System

    The Advanced Gun System is a naval gun system under development by BAE Systems Armaments Systems (formerly United Defense) for the United States Navy as part of the DD(X) destroyer program.

    Originally designed for mounting as a vertical gun, this 155 mm (6.1") caliber gun has since been slated for mounting within a more conventional turret arrangement. The AGS is designed to offer a weapon system capable of delivering precision munitions at a high rate of fire and at over-the-horizon ranges. As a vertical gun system it would only have been capable of firing guided munitions; the turret mounting will allow the use of unguided munitions as well.

    Description

    The AGS uses the same 155 mm caliber as most American field artillery forces, although it does not share the ability to fire the same ammunition. Instead, a new range of ammunition is under development for this weapon. The gun barrel is 62 calibers long, and is able to fire the entire magazine (300+ rounds) with an average rate of fire of ten rounds per minute using a water cooled barrel. The AGS is to be mounted in a turret specifically designed for the DD(X) destroyer with fully automated ammunition supply and operation. The turret itself is designed to be stealthy, allowing for the entire length of the barrel to be enclosed within the turret housing when not firing.

    Ammunition

    The development of new ammunition for the AGS under the name Long Range Land Attack Projectile (LRLAP) is one of the major advances offered by the AGS program. The munitions are to be highly accurate, with a circular error probable of 50 m or less. Lockheed-Martin conducted a flight test of the munition in July 2005, reporting a flight distance of 59 nautical miles (109 km).

    The LRLAP ammunition features separate projectile and propellant portions. Total weight is 225 pounds (102 kg), including a bursting charge of 24 lb (11 kg). The maximum length of the combined munition is 88 inches (223 cm), amounting to about 14 calibers.

    Operation

    A primary advantage of the AGS over the existing Mark 45 5" gun which equips most major surface combatants of the US Navy is its increased capability for supporting ground forces and striking land targets. With a 10 round per minute capacity, it offers the ability to deliver firepower close to that of a battery of six 155 mm howitzers. This will increase the utility of vessels equipped with the weapon, especially in areas in which the US Navy exercises absolute sea supremacy.

    Wikipedia Link



    Navy Advanced Gun System Scenario: Asymmetric Warfare



    Navy Advanced Gun System Scenario: Non-combatant Evacuation



    155 mm/62 (6.1") Advanced Gun System

    The Advanced Gun System (AGS) was originally being developed as part of the DD-21 program, but is now intended for the replacement DD (X) program. This weapon was formerly known as the Vertical Gun for Advanced Ships (VGAS), but as of September 1999 the Navy decided to abandon the truly vertical mounting and instead utilize a conventional turret configuration. An AGS firing Long Range Land Attack Projectiles (LRLAP) at 12 rounds per minute was considered to be equivalent to one 155 mm artillery battery (6 guns) firing at 2 rounds per gun per minute. However, as part of a weight reduction program, BAE in 2005 derated the ROF of the AGS down to 10 rounds per minute.

    As a vertical gun system, this weapon could have used only guided munitions. With the more traditional design, both conventional as well as guided munitions may now be used. The concept of this weapon is thus similar to that of the 5"/62 (12.7 cm) Mark 45 Mod 4 program. Ballistic round development for AGS has been reportedly postponed or cancelled and none of the existing US Army or NATO 155 mm projectiles can be adapted for use in AGS.

    The design of this weapon will include a fully automated ammunition magazine to reduce the crew size and to maximize the ammunition capacity. Ammunition for this weapon will use a separate propellant canister, which will be used for both conventional and guided munitions. Proposed projectiles include guided land and surface attack munitions as well as ballistic projectiles using course correcting fuzes (CCF). Planned CEP accuracy for guided weapons is 20 to 50 m (22 to 55 yards).

    In October 2001 the first prototype was successfully proof-tested, firing eleven test projectiles at pressures ranging from 50% below normal to 50% above normal. In April 2003 Lockheed-Martin was selected over Raytheon to continue development of the Long Range Land Attack Projectile (LRLAP). This phase includes the manufacturing of 15 rounds to conduct flight tests and support the AGS Critical Design Review (CDW).

    A September 2004 GAO report stated: "While development of the advanced gun system is proceeding as planned and has even overcome early challenges in design and development, the current plans do not include fully demonstrating the maturity of the subsystem. Land based testing of the gun system, including the automated mount and magazine, is planned for the summer of 2005 and flight tests for the munition are set to complete in September of 2005. However, the two technologies will not be tested together until after ship installation. Program officials cited lack of adequate test facilities as the reason for the separate tests."

    In June 2005, a Northrop Grumman press release stated that "The LRLAP Guided Flight-four (GF-04) gun test marked the longest successful guided-projectile test in history. The LRLAP, fired at the San Nicolas Island test facility at the Naval Air Warfare Center, Weapons Division, Pt. Mugu, Calif., (NAWC-WD), flew a guided trajectory to an impact location more than 59 nautical miles down range."

    In June 2005 United Defense won a $376 million contract from the Naval Sea Systems Command for the continuation of design, development and test of the AGS, including the fully automated gun, magazine and the Long Range Land Attack Projectile (LRLAP), for use aboard the Navy's new DD(X) Destroyer. In July 2005, BAE Systems, who purchased United Defense, awarded Lockheed Martin a $120 million contract for for further development and testing of LRLAP. This cost-plus-award-fee contract covers additional development and tests during 2006-2008 and support to AGS qualification testing during 2009-2010. More than 100 projectiles will be delivered and tested under this contract. Full-rate production is expected to begin in 2011.

    A 21 September 2005 US Naval Sea Systems Command press release regarding a rate of fire test for AGS conducted on 31 August 2005 stated: "The test successfully demonstrated a sustained maximum rate of fire of at least ten rounds per minute in eight round bursts, and unloaded eight complete rounds from a pallet in 45 seconds or less. The event also tested a sustained firing capability and reliability by demonstrating the AGS Engineering Development Model gun and magazine are capable of unloading several pallets of ammunition."

    A U.S. Department of Defense press release dated 7 April 2006 announced that "the first DD(X) destroyer will be designated DDG 1000. As the lead ship in the class, it will also be named in honor of former Chief of Naval Operations (CNO) Adm. Elmo R. "Bud" Zumwalt, Jr."

    A BAE press release dated 26 April 2007 announced that Naval Sea Systems Command had added a $108.9 million cost-plus-award-fee modification to the previously awarded contract for completion of the design, development and integration of the Advanced Gun System (AGS) for DDG-1000.

    With the decision to reduced the number of DD(X) destroyers to six or less - meaning twelve or fewer gun mounts - it would not be surprising if this program was significantly cut back or delayed.

    NavWeapons.com Link

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    AGS

    The Advanced Gun System (AGS) AGS is a 155mm Gun Weapon System planned for installation in the DD-21 Land-Attack Destroyers to provide high-volume, sustainable fires in support of amphibious operations and the joint land battle. AGS is a fully integrated gun weapon system that will include at least two separate gun systems for each DD-21 warship. Each gun system will be capable of independently firing up to 12 rounds per minute from an automated magazine storing as many as 750 rounds. The 155mm rounds are about 6.1 inches in diameter, versus the 127mm diameter of the standard 5-inch projectile. The AGS program also includes development of a 155mm version of the Extended-Range Guided Munitions (ERGM) as the first of a family of AGS munitions. AGS is being designed to meet the reduced manning and low radar-signature requirements of DD-21.

    AGS will employ 155mm caliber munitions capable of hitting targets accurately up to a distance of 100 nautical miles. One of the most amazing weapons of the First World War was the Kaiser Wilhelm Geschuetz, known to the Allies as the "Paris Gun". At a time when the best artillery of the day had a range of about 23 miles, it reached nearly 80. From March through August of 1918, three of the guns dropped 351 shells on Paris from the woods of Crepy, killing 256 and wounding 620 more. The Paris Gun's payload was only 15 pounds of explosive, accuracy was non-existent (it could hit Paris but not a specific target in Paris), and the barrels had to be rebored after 65 firings.

    The program started in FY 1999. The first gun system is scheduled for delivery to DD-21 in FY 2006, with an IOC of 2008. The AGS and its associated family of munitions are being developed under constrained affordability. The Developer/Manufacturer is United Defense Limited Partnership, Minneapolis, Minnesota, in partnership with the two DD-21 industry teams. United Defense began the design of the AGS in 1999 under a Section 845 Agreement with Bath Iron Works, the lead contractor for the DD 21 Shipbuilding Alliance. During 1999 United Defense conducted detailed analysis and trade studies for the AGS and recommended using a conventional single-barrel 155-mm Naval gun. With the acceptance of the Alliance and the Navy, United Defense began preliminary design of the AGS in November 2000.

    In the mid-1990s the Navy planned to address its surface fire support capability deficiencies in two phases, near- (scheduled completion by fiscal year 2001) and long-term (time frame to be defined). In the long-term phase, the Navy planned to develop a 155-millimeter vertical gun for advanced ships (VGAS) with an extended range guided munition. The Navy planned to equip the class of surface combatants, the DD-21 class, with the vertical guns beginning about the year 2008. The extended range guided munition technologies being developed within the near-term phase, along with the technologies being examined by several separately funded Advanced technology demonstration projects, were expected to be applicable in the long-term phase to develop other guided projectiles, including 155-millimeter and larger versions.

    The development of the conceptual 155 millimeter gun focused on both a pointing gun or a fixed, vertical gun [VGAS] -- the pointing gun was selected. The heart this gun will be an automated, ammunition magazine to reduce manning and increase the magazine capacity for rounds. With two VGAS guns on DD-21 it would be possible to carry as many as 1400-1500 rounds in a CESB module no bigger than the current VLS launcher.

    With fully automated magazines, Extended Range Guided Munitions (ERGM), and the equivalent of two USMC M198 155mm Howitzer Batteries in firepower, the two Advanced Gun Systems (AGS) in DD 21 will radically influence future naval gun developments. The vision for a littoral warfare strategy requires a system capable of providing effective and sustained Naval Surface Fire Support (NSFS) for amphibious operations and joint land battles. AGS will provide the needed accuracy, range, responsiveness, and volume of fire to fully meet the Navy's NSFS requirements.

    Associated with the gun are gunfire control functionality integrated into the DD 21 Total Ship Computing Environment (TSCE), an automated magazine, and low-radar and IR signatures for the gun and barrel. AGS design includes a family of 155mm extended range guided projectiles with warheads matched to the projected land attack target set. Efforts are underway to achieve as much commonality as possible with U.S. Army 155mm projectiles.

    Beyond its role on DD 21, AGS may someday serve as a model for future large caliber naval gun systems. Indeed, AGS requirements demand the most capable naval gun system ever produced, its extended range dwarfing the range of the 5"/54 Mark 4 mod 2 guns currently found on U.S. surface combatants. In addition, the expected projectile weight for the AGS munitions is much larger than that of current guns. Other revolutionary capabilities being developed in conjunction with AGS include state-of-the-art materials, and advanced barrel cooling methods. Finally, future lethality enhancements may include a penetrating capability that will certainly improve the warfighting capability of DD 21 and any other 21st century combatant.

    Global Security.com

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    Sheep dog standing before wolves The Dane's Avatar
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    Who needs missiles?

    Tube-artillery(land and sea) is becoming quit advanced these days.
    Instant respons, cool!!

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    Quote Originally Posted by Danskeren View Post
    Who needs missiles?

    Tube-artillery(land and sea) is becoming quit advanced these days.
    Instant respons, cool!!
    From the Wiki Link:
    Usage

    The AGS is currently only slated for inclusion on the DD(X), although it could also be included in other future ship designs. No plans have been revealed to retrofit it to current ship designs. The shortening of DD(X) procurement to six or fewer ships increases the likelihood that BAE will attempt to market AGS to other programs.
    A land platform maybe?

    A 65 caliber 155mm gun would be a beast!!

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    Senior Member soutikghosh's Avatar
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    Interesting article.

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    Quote Originally Posted by Lt-Col A. Tack View Post
    From the Wiki Link:


    A land platform maybe?

    A 65 caliber 155mm gun would be a beast!!
    You would need one hell of a platform

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    Quote Originally Posted by Danskeren View Post
    You would need one hell of a platform
    Indeed!

    Too bad this gun requires new 155mm ballistic ammo.
    Last edited by Lt-Col A. Tack; 04-21-2008 at 07:33 PM.

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    The pdf is a proposal to modify a Spruance-class destroyer by adding an AGS for evaluation.
    I'm not sure what the status of this proposal would be currently.


    Here's the file

    EXECUTIVE SUMMARY

    Installation of the AGS in USS THORN can be accomplished while retaining most of the baseline capabilities of the platform. The outcome of the analysis of alternatives indicated that placement of AGS mount aft, in place of Mount 52 and the NATO Sea Sparrow Missile system, as the preferred alternative.

    Among the reasons for its selection was the 304 round capacity of its magazine, the retention of more major war-fighting capabilities, and the minimization of cost and baseline ship impact. This configuration results in degradation of the AAW self-defense capability of the modified USS THORN, due to the loss of the NSSMS. However, with the full preservation of the baseline strike and antisubmarine capabilities, the ship remains a viable war-fighting platform.


    APPENDIX A

    MISSION NEED STATEMENT FOR INSTALLATION OF THE ADVANCED GUN SYSTEM ON SPRUANCE CLASS DESTROYERS UNCLASSIFIED MISSION NEED STATEMENT FOR INSTALLATION OF THE ADVANCED GUN SYSTEM ON SPRUANCE CLASS DESTROYERS


    1. DEFENSE PLANNING GUIDANCE ELEMENT

    a. This Mission Need Statement (MNS) provides requirements for conversion of a DD- 963 class destroyer to include the Advanced Gun System. The multi-mission capabilities of the Spruance class Destroyer will be maintained to the greatest extent possible while maintaining a balanced warship.

    Although many war-fighting areas may be degraded as a result of the installation, the overall ship system will be enhanced to include advanced gunfire support and gun weapon capabilities. The mission capabilities must be fully interoperable with other naval, interagency, joint and allied forces.

    b. This MNS should guide Spruance Advanced Gun System (AGS) conversion design, research, development and installation program decisions, service and joint doctrine, and cooperative efforts with U.S. allies.

    2. MISSION AND THREAT ANALYSIS

    a. Mission. The general mission of this converted ship is to conduct gunfire support missions including long-range gunfire missions in addition to many of the missions of an unmodified Spruance class destroyer. More specifically, the mission is to carry the war to the enemy through offensive operations by being able to launch and support precision guided selfpropelled projectiles and to provide firepower support for amphibious and other ground forces while maintaining battlespace awareness and defense against theater missile, air, surface, and subsurface threats.

    b. Objectives. The Spruance Conversion including AGS must be a low-cost conversion alternative to add the full capabilities of the AGS to the central capabilities of the Spruance Destroyer. Minimizing hull and bulkhead modification and redesign are central to achieving a low cost conversion.

    c. Capabilities. Since the converted Destroyer will remain a viable ship of the line, as many of the central capabilities of the Spruance Destroyer as possible will be preserved while providing full space, electrical load, and weight considerations for the AGS.

    3. POTENTIAL MATERIEL ALTERNATIVES

    (1) Replacement of the aft 5”/54 caliber gun and NATO Sea Sparrow Missile system with the AGS system

    (2) Removal of the forward VLS bank and replacement with AGS. This would involve removal of the 5”/54 caliber mount to allow additional space for the AGS support systems and swing circle.


    This study proposed turning the Spruance-Class Destroyer USS Thorn into a test bed for the AGS system in order to mitigate risk on the DD (X) project. According to the study, it would also be possible to turn retiring Spruance-class ships into land-attack destroyers by removing the aft 5-inch gun and some of its air defense capabilities.

    Link
    Interesting notion:
    "According to the study, it would also be possible to turn retiring Spruance-class ships into land-attack destroyers by removing the aft 5-inch gun and some of its air defense capabilities."
    Last edited by Lt-Col A. Tack; 04-21-2008 at 11:32 PM.

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    Sheep dog standing before wolves The Dane's Avatar
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    The 5" ERGM is still on track right?
    We(Denmark) just bought some 5"/62 cal. for firing that round.

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    Reminds me of the MONARC-Concept.



    Monarc, which stands for "Modular Naval Artillery Concept", is a joint development of Rheinmetall Defence, Krauss-Maffei Wegmann GmbH, ThyssenKrupp Marine Systems and Thales Nederland B.V. The concept calls for mounting the turret of a 155 mm army artillery system onto the deck of a frigate-sized ship. The consortium selected Germany's PzH2000 self-propelled howitzer as the turret system, which is capable of engaging targets at ranges of up to 40 kilometres (Rheinmetall is currently working on a new generation of ammunition with twice the range). The turret system has been successfully installed on a German Navy 124-class frigate. Thanks to Monarc, the world's navies can benefit from the German defence industry's technological lead in the domain of large-calibre artillery systems.

    http://www.rheinmetall-detec.de/inde...4&lang=3&pdb=1

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    Purveyor of intelligent reading material Lt-Col A. Tack's Avatar
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    Quote Originally Posted by Danskeren View Post
    The 5" ERGM is still on track right?
    We(Denmark) just bought some 5"/62 cal. for firing that round.
    I think so according to NavWeapons.com:
    A 23 August 2007 BAE press release stated that BAE had been awarded a contract for the overhaul, manufacture and upgrade of these guns and mountings as part of the CG-47 Cruiser Modernization program. These ships will replace their existing 5"/54 (127 mm) guns and mountings with the Mark 45 Mod 4. Link
    Sorry for the delay, I had to do some checking.

    I guess ERGM round has been cancelled.

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    Purveyor of intelligent reading material Lt-Col A. Tack's Avatar
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    Quote Originally Posted by little icebear View Post
    Reminds me of the MONARC-Concept.



    Monarc, which stands for "Modular Naval Artillery Concept", is a joint development of Rheinmetall Defence, Krauss-Maffei Wegmann GmbH, ThyssenKrupp Marine Systems and Thales Nederland B.V. The concept calls for mounting the turret of a 155 mm army artillery system onto the deck of a frigate-sized ship. The consortium selected Germany's PzH2000 self-propelled howitzer as the turret system, which is capable of engaging targets at ranges of up to 40 kilometres (Rheinmetall is currently working on a new generation of ammunition with twice the range). The turret system has been successfully installed on a German Navy 124-class frigate. Thanks to Monarc, the world's navies can benefit from the German defence industry's technological lead in the domain of large-calibre artillery systems.

    http://www.rheinmetall-detec.de/inde...4&lang=3&pdb=1
    I think I remember this.

    Didn't they get the gun mount figured out, but were having trouble "navalizing" the gun?

    Neat concept, but I thought it was being abandoned for use on the F125 frigates.

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    Found something myself

    http://www.navweaps.com/Weapons/WNUS_5-62_mk45.htm

    Mark 45 Mod 4 is the gun we bought.

    [FONT=Arial]However, in March 2008 the Navy abandoned the ERGM, after it failed a series of tests in February 2008. This ends a 12-year, $600 million project that has been plagued with multiple problems.[/FONT]
    Too bad then!

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    Purveyor of intelligent reading material Lt-Col A. Tack's Avatar
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    Quote Originally Posted by Danskeren View Post
    Found something myself

    http://www.navweaps.com/Weapons/WNUS_5-62_mk45.htm

    Mark 45 Mod 4 is the gun we bought.

    Too bad then!
    Half a billion dollars down the drain.

    Thank you very much Pentagon!

    It's like they think it grows on trees or something.

    So, is there no guided round for the Mark 45 Mod 4 in the works?

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    We' just have too use our Harpoon Block II/III then.
    And T-LAM's later on.

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