50 Percent
structurally complete

On June 22, 2017, Huntington Ingalls Industries (HII) announced that the nuclear-powered aircraft carrier USS John F. Kennedy (CVN-79) grew about 70 feet/21.3 m in length with the addition of the lower stern. The lower stern was lifted into place at the company’s Newport News Shipbuilding division, where the second Gerald R. Ford-class aircraft carrier is now 50 percent structurally complete.

Shipbuilders at Newport News Shipbuilding lifted the lower stern of CVN-79 into place
Shipbuilders at Newport News Shipbuilding lifted the lower stern of CVN-79 into place

Like Ford, Kennedy is being built using modular construction, a process where smaller sections of the ship are welded together to form larger structural units (called «superlifts»), equipment is then installed, and the large superlifts are lifted into the dry dock using the company’s 1,050-metric ton gantry crane.

«This is a significant milestone in the ship’s construction schedule», said Mike Shawcross, Newport News’ vice president, USS John F. Kennedy (CVN-79) and USS Enterprise (CVN-80) aircraft carrier construction. «We are halfway through lifting the units onto the ship, and many of the units are larger and nearly all are more complete than the CVN-78 lifts were. This is one of many lessons learned from the construction of the lead ship that are helping to reduce construction costs and improve efficiencies on Kennedy».

After several days of preparations, the 932-metric ton lower stern lift took about an hour to complete, thanks to a team of about 25 shipbuilders – from riggers and the crane operator to shipwrights and ship fitters. The lower stern consists of 30 individual units and includes the ship’s rudders, steering gear rooms and electrical power distribution room. The carrier is on track to be completed with 445 lifts, which is 51 fewer than Ford and 149 fewer than USS George H.W. Bush (CVN-77), the last Nimitz-class carrier.

The lower stern, which weights 932 metric tons, consists of 30 individual units and includes the ship’s rudders, steering gear rooms and electrical power distribution room
The lower stern, which weights 932 metric tons, consists of 30 individual units and includes the ship’s rudders, steering gear rooms and electrical power distribution room

 

General Characteristics

Builder Huntington Ingalls Industries Newport News Shipbuilding, Newport News, Virginia
Propulsion 2 A1B* nuclear reactors, 4 shafts
Length 1,092 feet/333 m
Beam 134 feet/41 m
Flight Deck Width 256 feet/78 m
Flight Deck Square 217,796 feet2/20,234 m2
Displacement approximately 100,000 long tons full load
Speed 30+ knots/34.5+ mph/55.5+ km/h
Crew 4,539 (ship, air wing and staff)
Armament ESSM (Evolved Sea Sparrow Missile), RAM (Rolling Airframe Missile), Mk-15 Phalanx CIWS (Close-In Weapon System)
Aircraft 75+

* – Bechtel Plant Machinery, Inc. serves the U.S. Naval Nuclear Propulsion Program

Aircraft Carrier John F. Kennedy (CVN-79) Reaches 50 Percent Structural Completion
Aircraft Carrier John F. Kennedy (CVN-79) Reaches 50 Percent Structural Completion

 

Ships

Ship Laid down Launched Commissioned Homeport
USS Gerald R. Ford (CVN-78) 11-13-2009 11-09-2013
USS John F. Kennedy (CVN-79) 08-22-2015
USS Enterprise (CVN-80)

John F. Kennedy (CVN-79) Lower Stern Lift

Leave a Reply