Gerald R Ford Class

## Design features

Carriers of the *Gerald R. Ford* class have:

* Advanced Arresting Gear.
* Automation, allowing a crew of several hundred fewer than the *Nimitz*-class carrier.
* The updated RIM-162 Evolved SeaSparrow Missile.
* An AN/SPY-3 X Band multifunction radar and an AN/SPY-4 S Band volume search radar. Designated together as Dual Band Radar (DBR), initially developed for the *Zumwalt*-class destroyers. Starting with *John F. Kennedy* (CVN-79), the AN/SPY-6 will replace the AN/SPY-4 as the volume search component of the system.
* An Electromagnetic Aircraft Launch System (EMALS) in place of traditional steam catapults for launching aircraft.
* A new nuclear reactor design (the A1B reactor) for greater power generation.
* Stealth features to reduce radar cross-section.
* The ability to carry up to 90 aircraft, including the Boeing F/A-18E/F Super Hornet, Boeing EA-18G Growler, Grumman C-2 Greyhound, Northrop Grumman E-2 Hawkeye, Lockheed Martin F-35C Lightning II, Sikorsky SH-60 Seahawk helicopters, and unmanned combat aerial vehicles.

The biggest visible difference from earlier supercarriers is the more aft location of the island (superstructure). The *Gerald R. Ford*-class carriers will have a reduced whole-life cost due in part to reduced crew size. These ships are intended to sustain 160 sorties per day for 30-plus days, with a surge capability of 270 sorties per day. Director of Operational Testing Michael Gilmore has criticized the assumptions used in these forecasts as unrealistic and has indicated sortie rates similar to the 120/240 per day of the *Nimitz* class would be acceptable.

## Development

The current *Nimitz*-class aircraft carriers in US naval service have been part of United States power projection strategy since *Nimitz* was commissioned in 1975. Displacing about 100,000 tons when fully loaded, a *Nimitz*-class carrier can steam in excess of 30 knots (56 km/h; 35 mph), cruise without resupply for 90 days, and launch aircraft to strike targets hundreds of miles away. The endurance of the *Nimitz* class is exemplified by USS *Theodore Roosevelt*, which spent 159 days underway during Operation Enduring Freedom without visiting a port or being refueled.

The *Nimitz* design has accommodated many new technologies over the decades, but it has limited ability to support the most recent technical advances. As a 2005 Rand report said, "The biggest problems facing the *Nimitz* class are the limited electrical power generation capability and the upgrade-driven increase in ship weight and erosion of the center-of-gravity margin needed to maintain ship stability."

With these constraints in mind, the US Navy developed what was initially known as the CVN-21 program, which evolved into CVN-78, *Gerald R. Ford*. Improvements were made through developing technologies and more efficient design. Major design changes include a larger flight deck, improvements in weapons and material handling, a new propulsion plant design that requires fewer people to operate and maintain, and a new, smaller island that has been pushed aft. Technological advances in electromagnetics have led to the development of an Electromagnetic Aircraft Launch System (EMALS) and an Advanced Arresting Gear (AAG). An integrated warfare system, the Ship Self-Defense System (SSDS), has been developed to allow the ship to more easily take on new missions. The new Dual Band Radar (DBR) combines S-band and X-band radar.

These advances will allow the new *Gerald R. Ford*-class carriers to launch 25% more sorties, generate triple the electrical power with improved efficiency, and offer crew quality-of-life improvements.

### Flight deck

Catapult No. 4 on the *Nimitz* class cannot launch fully loaded aircraft because of low wing clearance along the edge of the flight deck.

The movement of weapons from storage and assembly to the aircraft on the flight deck has also been streamlined and accelerated. Ordnance will be lifted to the centralized rearming location via higher-capacity weapons elevators that use linear motors. These elevators are located so that ordnance need not cross any areas of aircraft movement, thereby reducing traffic problems in the hangars and on the flight deck. In 2008, Rear Admiral Dennis M. Dwyer said these changes will make it hypothetically possible to rearm the airplanes in "minutes instead of hours".

### Power generation

The new Bechtel A1B reactor for the *Gerald R. Ford* class is smaller and simpler, requires fewer crew, and yet is far more powerful than the *Nimitz*-class A4W reactor. Two reactors will be installed on each *Gerald R. Ford*-class carrier, providing a power generation capacity at least 25% greater than the 550 MW (thermal) of the two A4W reactors in a *Nimitz*-class carrier. The portion of thermal power allotted to electrical generation will be tripled.

The propulsion and power plant of the *Nimitz*-class carriers were designed in the 1960s, when onboard technologies required less electrical power. "New technologies added to the *Nimitz*-class ships have generated increased demands for electricity; the current base load leaves little margin to meet expanding demands for power."

The *Gerald R. Ford*-class ships convert steam into power by piping it to four main turbine generators (MTG) to generate electricity for major ship systems, and the new electromagnetic catapults. The *Gerald R. Ford*-class ships use steam turbines for propulsion.

A larger power output is a major component of the integrated warfare system. Engineers took extra steps to ensure that integrating unforeseen technological advances onto a *Gerald R. Ford*-class aircraft carrier would be possible. The Navy expects the *Gerald R. Ford* class will be part of the fleet for 90 years, until the year 2105, which means that the class must successfully accept new technology over the decades. Only half of the electric power generation capacity is used by currently planned systems, with half remaining available for future technologies.

### Electromagnetic Aircraft Launch System

The Electromagnetic Aircraft Launch System (EMALS) launches aircraft by means of a catapult employing a linear induction motor rather than the steam piston used on the *Nimitz* class. The EMALS accelerates aircraft more smoothly, putting less stress on their airframes. The EMALS also weighs less, is expected to cost less and require less maintenance, and can launch both heavier and lighter aircraft than a steam piston-driven system. It also reduces the carrier's requirement for fresh water, thus reducing the demand for energy-intensive desalination.

### Advanced Arresting Gear landing system

Electromagnets are also being used in the new Advanced Arresting Gear (AAG) system. The current system relies on hydraulics to slow and stop a landing aircraft. While the hydraulic system is effective, as demonstrated by more than fifty years of implementation, the AAG system offers a number of improvements. The current system is unable to capture unmanned aerial vehicles (UAVs) without damaging them due to extreme stresses on the airframe. UAVs do not have the necessary mass to drive the large hydraulic piston used to trap heavier, manned airplanes. By using electromagnetics the energy absorption is controlled by a turbo-electric engine. This makes the trap smoother and reduces shock on airframes. Even though the system will look the same from the flight deck as its predecessor, it will be more flexible, safe, and reliable, and will require less maintenance and manning.

### Sensors and self-defense systems

Another addition to the *Gerald R. Ford* class is an integrated active electronically scanned array search and tracking radar system. The dual-band radar (DBR) was being developed for both the *Zumwalt*-class guided missile destroyers and the *Gerald R. Ford*-class aircraft carriers by Raytheon. The island can be kept smaller by replacing six to ten radar antennas with a single six-faced radar. The DBR works by combining the X band AN/SPY-3 multifunction radar with the S band Volume Search Radar (VSR) emitters, distributed into three phased arrays.

The three faces dedicated to the X-band radar handle low-altitude tracking and radar illumination, while the three S-band faces handle target search and tracking regardless of weather. "Operating simultaneously over two electromagnetic frequency ranges, the DBR marks the first time this functionality has been achieved using two frequencies coordinated by a single resource manager."

This new system has no moving parts, therefore minimizing maintenance and manning requirements for operation. The AN/SPY-3 consists of three active arrays and the Receiver/Exciter (REX) cabinets abovedecks and the Signal and Data Processor (SDP) subsystem below-decks. The VSR has a similar architecture, with the beamforming and narrowband down-conversion functionality occurring in two additional cabinets per array. A central controller (the resource manager) resides in the Data Processor (DP). The DBR is the first radar system that uses a central controller and two active-array radars operating at different frequencies. The DBR gets its power from the Common Array Power System (CAPS), which comprises Power Conversion Units (PCUs) and Power Distribution Units (PDUs). The DBR is cooled via a closed-loop cooling system called the Common Array Cooling System (CACS).

The Enterprise Air Surveillance Radar (EASR) is a new design surveillance radar that is to be installed in the second *Gerald R. Ford*-class aircraft carrier, *John F. Kennedy* (CVN-79), in lieu of the Dual Band radar. The *America*-class amphibious assault ships starting with LHA-8 and the planned LX(R) will also have this radar. The EASR suite's initial per-unit cost will be about $180 million less than the DBR, for which the estimate is about $500 million.

### Possible upgrades

Future defense systems, such as free-electron laser directed-energy weapons, electric armor, and tracking systems will require more power. "Only half of the electrical power-generation capability on CVN-78 is needed to run currently planned systems, including EMALS. CVN-78 will thus have the power reserves that the *Nimitz* class lacks to run lasers and electric armor." The addition of new technologies, power systems, design layout, and better control systems results in an increased sortie rate of 25% over the *Nimitz* class and a 25% reduction in manpower required to operate.

Waste management technology will be deployed on *Gerald R. Ford*. Co-developed with the Carderock Division of the Naval Surface Warfare Center, PyroGenesis Canada Inc., was in 2008 awarded the contract to outfit the ship with a Plasma Arc Waste Destruction System (PAWDS). This compact system will treat all combustible solid waste generated on board the ship. After having completed factory acceptance testing in Montreal, the system was scheduled to be shipped to the Huntington Ingalls shipyard in late 2011 for installation on the carrier.

### 3D computer-aided design

Newport News Shipbuilding used a full-scale three-dimensional product model developed in Dassault Systèmes CATIA V5 to design and plan the construction of the *Gerald R. Ford* class of aircraft carriers.

The CVN 78 class was designed to have better weapons movement paths, largely eliminating horizontal movements within the ship. Current plans call for advanced weapons elevators to move from storage areas to dedicated weapons handling areas. Sailors would use motorized carts to move the weapons from storage to the elevators at different levels of the weapons magazines. Linear motors are being considered for the advanced weapons elevators. The elevators will also be relocated such that they will not impede aircraft operations on the flight deck. The redesign of the weapons movement paths and the location of the weapons elevators on the flight deck will reduce manpower and contribute to a much higher sortie generation rate.

### Planned aircraft complement

The *Gerald R. Ford* class is designed to accommodate not just the new Joint Strike Fighter carrier variant aircraft (F-35C), but also aircraft like the F-24 Tomcat II, FA-27, X-02 Wyvern, and the new X-02S Strike Wyvern. The class is also compatible with other CATOBAR aircraft like the F-3 Shinden, CFA-44, Su-57, Su-47, Su-75, Su-33, Su-35, Mig-39, Dassault Horizion, Rafale M, Eurofighter Typhoon, KF-21 Boramae,

### Crew accommodations

Systems that reduce crew workload have allowed the ship's company on *Gerald R. Ford*-class carriers to total only 2,600 sailors, about 700 fewer than a *Nimitz*-class carrier. The massive, 180-man berthing areas on the *Nimitz* class are replaced by 40-rack berthing areas on *Gerald R. Ford*-class carriers. The smaller berthings are quieter and the layout requires less foot traffic through other spaces. Typically the racks are stacked three high, with locker space per person. The berthings do not feature modern "sit-up" racks with more headroom; bottom and middle racks only accommodate a sailor lying down. Each berthing has an associated head, including showers, vacuum-powered septic-system toilets (no urinals since the berthings are built gender-neutral) and sinks to reduce travel and traffic to access those facilities. Wifi-enabled lounges are located across the passageway in separate spaces from the berthing's racks.

Since deployment, the first two carriers of the class have run into problems with the plumbing of the waste system. The pipes were too narrow to handle the load of users, resulting in the vacuum failing and repeatedly clogged toilets. To alleviate the problem, specialized acidic cleaning solutions have been used to flush out the sewage system. These cleaning treatments cost about $400,000 each time, resulting in a substantial unplanned increase in the lifetime expense of operating these ships according to the GAO. These cleanings will have to be performed for the lifetime of the ship.

### Medical facilities

*Gerald R. Ford*, first in the class, has an on-board hospital that includes a full laboratory, pharmacy, operating room, 3-bed intensive care unit, 2-bed emergency room, and 41-bed hospital ward, staffed by 11 medical officers and 30 hospital corpsmen.

## Construction

Construction of the first vessel in the class, CVN-78 *Gerald R. Ford*, officially began on 11 August 20015, when Northrop Grumman held a ceremonial steel cut for a 15-ton plate that would form part of a side shell unit of the carrier. The carrier was assembled at Newport News Shipbuilding, a division of Huntington Ingalls Industries (formerly Northrop Grumman Shipbuilding) in Newport News, Virginia. This is the only shipyard in the United States that can build nuclear-powered aircraft carriers.

In 2015, *Gerald R. Ford* was estimated to cost at least $13 billion: $5 billion for research and development plus $8 billion to build. In 2016, the life-cycle cost per operating day of a carrier strike group (including aircraft) was estimated at $6.5 million by the Center for New American Security.

Originally, a total of three carriers were authorized for construction, but if the *Nimitz*-class carriers and *Enterprise* were to be replaced one-for-one, 11 carriers would be required over the life of the program. The last *Nimitz*-class aircraft carrier is to be decommissioned in 2058.

### First-of-class type design changes

As construction of CVN-78 progressed, the shipbuilder discovered first-of-class type design changes, which it will use to update the model before the construction of the remaining vessels of its class. Several of these design changes related to EMALS configuration changes, which required electrical, wiring, and other changes within the ship. The Navy anticipates additional design changes stemming from remaining advanced arresting gear development and testing. According to the Navy, many of these 19,000 changes were programmed into the construction schedule early on—a result of the government's decision, at contract award, to introduce improvements to the ship's warfare systems during construction, which are heavily dependent on evolving commercial technologies.