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Archives by category > Engines & Propulsion – Naval (RSS)

Airfields Afloat: The USA’s New Gerald Ford Class Super-Carriers

Jan 11, 2021 04:56 UTC DII

Latest updates[?]: The Pentagon’s Director, Operational Test & Evaluation (DOT&E) latest assessment of the Electromagnetic Aircraft Launch System (EMALS) and Advanced Arresting Gear (AAG) installed on USS Gerald R. Ford remains pessimistic, Bloomberg reports. Robert Behler assessment covers 3,975 launches and landing operations that ran from November 2019 through September 2020. In his report, Behler said the EMALS was failing after 181 launches. It was required to work for 4,166 launches before failure. The worst was when it broke down for three days on two occasions in 2020. Behler also found fault with the AAG, it was working for an average of 48 traps before failing.

CV-74 USS Stennis and CV HMS Illustrious

USA’s Nimitz Class &
UK’s Invincible Class

Some nations have aircraft carriers. The USA has super-carriers. The French Charles De Gaulle Class nuclear carriers displace about 43,000t. India’s new Vikramaditya/ Admiral Gorshkov Class will have a similar displacement. The future British CVF Queen Elizabeth Class and related French PA2 Project are expected to displace about 65,000t, while the British Invincible Class carriers that participated in the Falklands War weigh in at just 22,000t. Invincible actually compares well to Italy’s excellent new Cavour Class (27,000t), and Spain’s Principe de Asturias Class (17,000t). The USA’s Nimitz Class and CVN-21 Gerald R. Ford Class, in contrast, fall in the 90,000+ tonne range. Hence their unofficial designation: “super-carriers”. Just one of these ships packs a more potent air force than many nations.

CVN-71 Theodore Roosevelt Cutaway

Nimitz Class cutaway

As the successor to the 102,000 ton Nimitz Class super-carriers, the CVN-21 program aimed to increase aircraft sortie generation rates by 20%, increase survivability to better handle future threats, require fewer sailors, and have depot maintenance requirements that could support an increase of up to 25% in operational availability. The combination of a new design nuclear propulsion plant and an improved electric plant are expected to provide 2-3 times the electrical generation capacity of previous carriers, which in turn enables systems like an Electromagnetic Aircraft Launching System (EMALS, replacing steam-driven catapults), Advanced Arresting Gear, and integrated combat electronics that will leverage advances in open systems architecture. Other CVN-21 features include an enhanced flight deck, improved weapons handling and aircraft servicing efficiency, and a flexible island arrangement allowing for future technology insertion. This graphic points out many of the key improvements.

DID’s CVN-21 FOCUS Article offers a detailed look at a number of the program’s key innovations, as well as a list of relevant contract awards and events.

Continue Reading… »

SSBN-X Subs: Congressmen Promote Refresh, Have Sub Bases in Districts

Nov 09, 2020 04:58 UTC

Latest updates[?]: The US Navy awarded General Dynamics Electric Boat a $9.5 billion contract modification for the construction and test of the lead and second ships of the Columbia Class. The contract modifies a $5 billion deal awarded in 2017. It exercises an option to test the ships and to provide design and engineering support. „This modification to the integrated product and process development (IPPD) contract supports the fiscal 2021 construction start of the lead ship (SSBN 826) and advance procurement, advance construction, coordinated material buys and full construction of the follow hull (SSBN 827) in fiscal 2024“, the Pentagon said in a statement. The original contract was for design completion for the Columbia-class ballistic missile submarines, which are meant to replace the Navy's current force of 14 aging Ohio Class boats. The Columbia Class is an upcoming class of nuclear submarines. General Dynamic subsidiary Electric Boat in collaboration with Newport News Shipbuilding are construction the Columbia Class ballistic missile submarines (SSBNs) for the US Navy. Work under the contract modification will take place in Connecticut, Virginia and Rhode Island. Estimated completion will be by April 2030.

Early SSBN-X Concept

SSBN-X concept

The US Navy needs new SSBN nuclear missile submarines. Their existing Ohio Class boats will begin to retire at a rate of 1 hull per year, beginning in 2027, as they reach the end of their 42-year operational lifetimes. Hence SSBN-X, also known as the Ohio Replacement Program for now.

The first step toward recapitalization involved a new Common Missile Compartment and Advanced Launcher for current and future nuclear missiles. The next step involves finalizing a design that can serve effectively to 2080, without destroying the US Navy’s shipbuilding budget in the process. Good luck with that one, but they have to to try. The maintenance of the USA’s nuclear deterrent is too important, in a world where nuclear weapons are proliferating.

Continue Reading… »

India’s Project 75 SSKs: Too Late to Save the Submarine Force?

Sep 23, 2019 04:52 UTC DII

Latest updates[?]: India's Mazagon Dock Shipbuilders Limited (MDL) has delivered another license-built Kalvari or Scorpène Class diesel-electric submarine to the Indian Navy. The vessel, which will be in service as INS Khanderi once commissioned, was handed over on September 19 at a delivery ceremony in Mumbai. Khanderi is the second of six boats ordered under an $3.2 billion contract signed with Naval Group (then known as DCNS) in October 2005 under India's Project 75 submarine program. The program's first-of-class, INS Kalvari , was commissioned in December 2017.
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SSK Scorpene OHiggins Cutaway

Scorpene cutaway

India’s submarine fleet currently consists of 16 boats: 10 Russian SSK Kilo (Sindhugosh) Class, 4 locally built SSK U209 (Shishumar) Class, a leased nuclear-powered Improved Akula Class SSN from Russia (INS Chakra), and its own INS Arihant SSBN. Most of the Kilos have been modernized, but readiness rates for India’s existing submarine fleet sits below 40%, and the U209s will have trouble lasting much beyond 2015. With Pakistan acquiring modern submarines, and Chinese submarine building exploding, expanding India’s submarine fleet became an obvious national priority.

In 2005, India confirmed that it would buy 6 Franco-Spanish Scorpene diesel submarines, with an option for 6 more and extensive technology transfer agreements. Unfortunately, 7 years after that deal was signed, “Project 75” has yet to field a single submarine. A poor Indian procurement approach, and state-run inefficiency, are pushing the country’s entire submarine force toward an aging crisis. This DID FOCUS article covers the Scorpene deal and its structure, adds key contracts and new developments, and offers insights into the larger naval picture within and beyond India.

Continue Reading… »

LCAC Hovercraft: US Navy’s Champion Schleppers Get SLEPped

May 13, 2019 04:56 UTC DII

Latest updates[?]: The Navy awarded Rolls-Royce an $8.6 million contract modification in order to procure 10 MT7 marin turbine installation parts kit shipsets for the Landing Craft, Air Cushion (LCAC) 100 class craft. The LCAC 100 will enhance the US amphibious force’s ship-to-shore capacity with a rated load capacity per craft of 74 short tonnes. LCAC-1s have a 60-short tonne-rated payload. The landing craft was originally designated the Ship-to-Shore Connector and is intended to support the rapid movement of Marine expeditionary forces from naval vessels to shore and will be able to tactically deliver personnel and heavy equipment. The LCAC 100 craft consists of four MT7 turbines. The Rolls-Royce MT7 delivers between 4 to 5 MW and shares common core architecture with the AE1107C-Liberty aero engine. The procurement is in support of the Ship-to-Shore Connector Program. An MT7 installation parts kit is one “shipset” consisting of four engine intakes, two right-hand engine exhausts and two left-hand engine exhausts. Work will take place in Indiana and is expected to be finished by January 2021.

US Navy LCAC Brushes Shoreline

LCAC versatility

The US military calls them Landing Craft, Air Cushion (LCAC). They’re high-speed, fully amphibious hovercraft capable of carrying a 60-ton payload (75 tons in overload) over water and land at speeds in excess of 40 knots and a nominal range of up to 200 nautical miles. Carrying equipment, troops, and/or supplies, the LCAC launches from inside the well deck of an amphibious warship, then travels the waves at high speed, runs right through the surf zone near the beach, and stops at a suitable place on land. Its cargo walks or rolls off. The LCAC returns to the surf to pick up more. Rinse. Agitate. Repeat.

LCAC ashore

LCAC, ashore

A total of 91 LCACs were built between 1984-2001, and their design itself dates back to the 1970s. They require regular maintenance, refurbishment, upgrades, and even life extension programs to keep them operational into the future. This free-to-view Spotlight article will covers the program from 2005 forward, tracking contracts and key events.

Continue Reading… »

India’s Nuclear Submarine Projects

Mar 11, 2019 04:52 UTC DII

Latest updates[?]: India signed a $3 billion contract for the lease of an Akula-1 class nuclear-powered attack submarine from Russia for a period of ten years. The submarine will be ready by 2025 and the contract includes refurbishment of the submarine with Indian communication and sensor systems, spares support and technical infrastructure for its operations. This submarine will replace INS Chakra, a submarine taken on a ten-year lease from Russia in 2012. The existing lease will be extended until the new submarine becomes operational. The so called Chakra III will not be equipped with long-range nuclear missiles because of international treaties and because it is not meant for deterrence patrols. In November last year, India’s first indigenous nuclear-powered submarine, INS Arihant, completed its first deterrence patrol. A second nuclear submarine, INS Arighat, will be commissioned later this year, with two more currently under construction.

SSN Akula Class

SSN Akula Class

According to GlobalSecurity.org, India’s ATV (advanced technology vessel) program to build a nuclear-powered submarine began in 1974, and became a serious effort in 1985. The Federation of American Scientists’ December 1996 document “The Indian Strategic Nuclear Submarine Project: An Open Literature Analysis” remains one of the best single open sources on India’s program. Unfortunately, it was compiled over a decade ago and has become rather dated. That project has continued, and this DID Spotlight article continues to collect open source information on the ATV program.

More and more sources were claiming that a rented Russian Akula class boat would be operational as a training vessel by 2009. The concept was correct, but the date was not. A deadly accident during K-152 Nerpa’s sea trials delayed that project, and further complications pushed its hand-over date to 2012. As efforts to move the Nerpa into service continue, India has finally launched its indigenous nuclear sub Arihant, to begin sea trials and testing.

Continue Reading… »

CVN 70 Carl Vinson’s Mid-Life RCOH Refueling & Maintenance

Feb 12, 2019 04:58 UTC

Latest updates[?]: The Navy contracted General Dynamics NASSCO-Bremerton with a $34.3 million modification for repair and alteration requirements for USS Carl Vinson (CVN 70) dry-docking planned incremental availability (DPIA). The USS Carl Vinson is the USA’s third Nimitz-class carrier. The Nimitz-class consists of ten nuclear-powered aircraft carriers. The ships under this class were the largest warships built and in-service until USS Gerald R. Ford entered the fleet in 2017. The USS Carl Vinson had its maiden voyage in 1983 and underwent refueling and overhaul between 2005 and 2009. The DPIA is the opportunity in the ship’s life cycle to conduct repairs and alterations. Just at the end of last month the aircraft carrier sailed into Sinclair Inlet bringing its crew of 3,000 to a new homeport and venue for revitalization. The Vinson is set to become the first aircraft carrier in the Navy to deploy with a squadron of F-35C Lightning II Joint Strike Fighters as part of its full air wing compliment. Work under the order will fully be performed in Bremerton and is scheduled to be finished by July next year.

CVN-70 Carl Vinson

CVN 70: Homecoming

Osama Bin Shot, Osama Bin Buried. (May 3/11)

In November 2005, Northrop Grumman Newport News in Newport News, VA was awarded a $1.94 billion cost-plus-incentive-fee contract for accomplishment of the FY 2006 mid-life refueling and complex overhaul (RCOH) of the Nimitz Class aircraft carrier USS Carl Vinson [CVN 70]. The ship was commissioned in 1982, and this effort shall provide for the accomplishment of the overhaul, alterations, repair, maintenance, and refueling of CVN 70 and its nuclear reactor plants to ensure continued safe operation of the ship. According to GlobalSecurity.org, the Carl Vinson is scheduled to remain in service until 2032.

It’s interesting to note that the US DoD comptroller’s FY 2007 “<http://www.defenselink.mil/comptroller/defbudget/fy2007/fy2007_weabook.pdf>Program Acquisition Costs by Weapon System” document lists split-funding of the CVN 70 RCOH over FY 2006-2007, with a total cost of $2.89 billion. So, how does this $1 billion discrepancy resolve itself? What about all those contracts before FY 2006? And how did the program go, now that the USS Carl Vinson has returned to the fleet at last?

Continue Reading… »

The US Navy’s Nuclear Propulsion Contracts

Dec 04, 2018 04:58 UTC

Latest updates[?]: Bechtel Plant Machinery Inc. is being awarded with three individual contracts for work on the Naval Nuclear Propulsion program. Awarded by the Naval Sea System Command, the contracts have cumulative face value of $1.7 billion and provide for various naval nuclear propulsion components. The components provide nuclear propulsion capabilities to power a variety of Navy vessels, including submarines and aircraft carriers, by drawing power from a small nuclear power plant installed on the vessel. FY 2019 shipbuilding and conversion funds in the amount of $1.2 billion are being obligated which will not expire at the end of the current fiscal year. Work will to various levels be performed at the company's facilities in Monroeville, Pennsylvania, and in Schenectady, New York.

Basic Nuclear Propulsion Plant

Basic Nuclear Propulsion
(click to expand)

This DII Spotlight article covers American nuclear propulsion industrial base contracts since the beginning of FY 2006. The USA has had an all-nuclear submarine fleet for over 50 years, a policy that dates back to the visionary Admiral Hyman Rickover. On the surface, America’s aircraft carriers became an all-nuclear fleet with the retirement of the USS Kitty Hawk [CV 63], and FY 2008-09 spending legislation pushed the US Navy to use nuclear power in its future CG (X) cruisers and new amphibious ship classes. At present, however, carriers are the only nuclear-powered American surface ships on the drawing board.

The civilian nuclear sector has seen major advances over the last 2 decades, and so has the military sector. The commitment to a nuclear fleet includes funding for those technical advances, as well as work to maintain both the reactors on board American ships, and the industrial base that supports them.

Continue Reading… »

France’s Future SSNs: The Barracuda Class

May 10, 2018 04:58 UTC DII

Latest updates[?]: The French government will buy a fifth Barracuda class nuclear attack submarine. A spokesperson for the Armed Forces Ministry confirmed in a statement that the Defense Minister Florence Parly made the decision on May 2nd. The draft multiyear budget that is set to run from 2019-2025 includes the funding for six Barracuda class submarines, delivery of which is scheduled for 2025. The Barracuda SSN program started in 2006 when France’s Defense Ministry awarded a contract for nuclear-propelled fast attack submarines to state-owned warship builder DCN and nuclear energy group Areva-TA. The Barracuda program will meet the French Navy’s operational mission needs by providing replacements for its 6 current Rubis Amethyste class nuclear attack submarines. The Barracuda’s are roughly the same size as the Royal Navy’s existing SSN Trafalgar Class boats, and twice the size of the current vessels. The program’s total value was initially set at then $11.13 billion but has since risen to over $12.32 billion.

SSN Barracuda Cutaway

SSN Barracuda cutaway

In December 2006, France’s Defense Ministry awarded a contract for nuclear-propelled fast attack submarines to state-owned warship builder DCN and nuclear energy group Areva-TA. The contract’s total value could be as high as EUR 8.6 billion, and it is set up as an initial EUR 1.0-1.4 billion contract (reports vary), followed by 6 options (tranches conditionnelles) to cover development expenses, the production of more submarines, and through-life support during their first years of operational service.

All ships wear out over time, and the repeated squeezing and relaxing experienced by submarine hulls make their replacement times less negotiable. The USA began introducing their new-generation NSSN Virginia Class fast attack boats in 2004, and Britain’s problem-plagued SSN Astute Class followed in 2010. Now, it’s France’s turn to renew its SSN fleet, as DCNS works to supply 6 Barracuda Class submarines between 2016-2027.

Continue Reading… »

Australia’s Next-Generation Submarines

Oct 04, 2016 00:45 UTC DII

Latest updates[?]: Lockheed Martin will provide combat systems for Australia's new fleet of submarines. The move is said to increase interoperability with fellow Lockheed system-user the US Navy. French firm DCNS won the $38 billion Australian submarine contract back in April defeating Germany's ThyssenKrupp Marine and Japan's Mitsubishi Heavy Industries and Kawasaki Heavy Industries. Since then, the company has been dealing with the aftermath of a 22,000 page data leak of submarines they are building for India, drawing a warning from Australian defense officials.
HMAS Waller

Bridge to the future?

In its 2009 White Paper, Australia’s Department of Defence and Labor Party government looked at the progress being made in ship killing surveillance-strike complexes, and at their need to defend large sea lanes, as key drivers shaping future navies. These premises are well accepted, but the White Paper’s conclusion was a surprise. It recommended a doubling of Australia’s submarine fleet to 12 boats by 2030-2040, all of which would be a new successor design that would replace the RAN’s Collins Class submarines.

The surprise, and controversy, stem from Australia’s recent experiences. The Collins Class was designed with the strong cooperation of ThyssenKrupp’s Swedish Kockums subsidiary, and built in Australia by state-owned ASC. The class has had a checkered career, including significant difficulties with its combat systems, issues with acoustic signature and propulsion, major cost growth to A$ 5+ billion, and schedule slippage. Worse still, reports indicated that the RAN can only staff 2 of its 6 submarines. High-level attention led to a report and recommendations to improve the force, but whether they will work remains to be seen. Meanwhile, the nature of Australia’s SEA 1000 future submarine project – and its eventual cost – remain unclear, with estimated costs in the A$ 36-44 billion range. This FOCUS article covers Australia’s options, decisions, and plans, as their future submarine program slowly gets underway.

Continue Reading… »

South Korea to Order 5 More U-214 AIP Submarines to Bridge to Indigenous Boats

May 08, 2015 00:01 UTC

Latest updates[?]: South Korea unveiled a new attack submarine. The sixth 214-class sub, built by Daewoo Shipbuilding and Marine Engineering Co., is a 1,800-ton boat powered by Air Independent Propulsion. The South Koreans ordered the first batch of 214-class subs in 2000, with an additional order for six boats set for delivery by 2020. The South Korean Navy recently stood up an independent submarine command, becoming the sixth country in the world to possess such an independent structure.The command is based at Jinhae Naval Base, in South Gyeongsang, managing its fleet of 13 boats.
s072 & CVN

Sohn Won-Yil & Nimitz

The German Type 214 was selected by Korea over the French/Spanish Scorpene Class that has been ordered by Chile, India, and Malaysia. Some would argue that U-214s are the most advanced diesel-electric submarines on the market, with an increased diving depth of over 400 meters, an optimized hull and propeller design, ultra-modern internal systems, and an Air Independent Propulsion (AIP) system that lets the diesel submarine stay submerged for long periods without needing to surface and snorkel air.

South Korea ordered its first 3 KSS-II/ Type 214 boats in 2000, which were assembled by Hyundai Heavy Industries. The Batch 2 order will add 6 more of the 65m, 1,700t boats, effectively doubling the ROKN’s number of modern submarines. The latest development is a $16 million order for Saab electronic systems for the 2nd batch of 214 submarines.

Continue Reading… »
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