Aircraft Carrier

Overview

A nuclear-powered aircraft carrier is the largest warship ever built and one of the largest machines of any kind: about 100,000 tonnes full load, 333 m long, with a crew near 4,500. Shipbuilders describe a modern carrier as roughly three million individual parts, assembled from more than 1,000 structural lifts that combine into about 450 erection-ready grand blocks before the hull comes together in dry dock over five or more years. As with every very large machine, the count is dominated by small repeated hardware: each Hull Grand Block carries on the order of 3,000 Weld Stud & Joint Fasteners and joint fasteners and 1,700 welded Structural Brackets, so the hull alone accounts for well over two million pieces.

Hull and construction

The Hull Structure is all-welded high-strength steel, HSLA-65 and HY-80 Hull Steel Plate from 6 to 40 mm, stiffened by tens of thousands of Hull Stiffener sections. Modern yards build modularly: each block is pre-outfitted in the shop with Pipe Hangers, cable runs and equipment foundations while still open and accessible, because installing the same hardware inside a closed hull costs three to five times as much labour. Blocks of 100 to 900 tonnes are then lifted into the dock by gantry crane and welded together. The finished hull divides into roughly 2,500 compartments behind about a thousand Watertight Doors and hatches, and steers with twin Rudders.

Flight deck

The Flight Deck is a 333 m armoured airfield. Four EMALS Catapults replace the steam catapults of earlier classes: each is a 91 m linear induction motor whose Linear Motor Stator Segments are energised in sequence by banks of IGBT Power Modules, drawing a 2–3 second pulse of up to 60 MJ from flywheel Energy Storage Rotors. The trough must stay straight to millimetre tolerance along its whole length, which is what the ~11,000-piece Catapult Fastener set of anchor bolts and shims is for. Recovery runs through four Arresting Gear Engines below deck: a landing aircraft catches an Arresting Cable at ~240 km/h and is stopped in about 100 m as the Water Twister converts the energy to heat while an induction motor (Stator Assembly and Rotor Assembly on the cable drum) trims the runout for each aircraft weight. Behind every catapult a water-cooled Jet Blast Deflector rises to protect deck crew from engine exhaust. The deck surface itself carries some 140,000 Flight Deck Fasteners, tie-down padeyes, track studs and plating fasteners, the largest single hardware population topside.

Island and sensors

The Island Superstructure sits well aft on the starboard deck edge, housing the navigation bridge and primary flight control. Its four fixed AESA Radar Array faces each hold about 1,000 gallium-nitride Radar T/R Modules, giving continuous hemispheric air search without rotating antennas, and the mast above carries some sixty Mast Antennas for communications, TACAN and electronic warfare.

Propulsion

Two pressurised-water Naval Reactors power the ship for 25 years without refuelling. Each plant pairs a forged Reactor Pressure Vessel running near 150 bar with two Steam Generators and four canned-rotor Reactor Coolant Pumps, supervised through about 600 instrumentation channels of Pressure Sensors and held together by a ~14,000-piece Reactor Plant Fastener set of tensioned studs and flange bolts. Steam drives four Main Steam Turbine sets, roughly 1,200 Turbine Blades each, through locked-train Main Reduction Gears onto four Propeller Shafts, ending in 9 m, ~30 t bronze Propellers. Each shaft loop closes through a titanium-tubed Main Condenser under deep vacuum, returned to the steam generators by Feedwater Pumps. Total shaft power exceeds 190 MW, and the same secondary steam spins eight Ship Service Turbine Generator sets for more than 100 MW of electrical generation, nearly three times earlier classes, to supply the electromagnetic catapults and weapons elevators.

Hangar and elevators

The Hangar Bay & Elevators group moves the air wing between decks. Three deck-edge Aircraft Elevators lift two fighters at a time on a stiffened Elevator Platform; eleven Advanced Weapons Elevators move 9-tonne ordnance loads from deep magazines using vertical linear motors rather than wire ropes, so the trunks can be sealed by hatches at every deck. Sliding Hangar Division Doors split the bay into three independent fire zones.

Electrical plant and habitability

The Electrical Distribution is the clearest window into the part count after the hull: more than 1,500 km of cable in ~12,000 individual Cable Runs, supported by roughly 180,000 Cable Hangers spaced every 60 cm, terminating in some 90,000 Connectors and distributed through thirty zonal Switchboards, each a cabinet of Circuit Breakers and protective Relays, with hundreds of Distribution Transformers stepping power down to 450 V and 120 V loads.

Auxiliary systems

Behind the headline machinery sits the plant that keeps a floating city alive. Four Distilling Plants boil seawater under vacuum into roughly 1,500 m³ of fresh and reactor-grade water a day. The JP-5 Fuel System stores about three million litres of aviation fuel and delivers it through Fuel Filter-Separator separators to deck Fueling Stations. Damage control runs on the Firefighting System: a pressurised seawater fire main, AFFF foam at AFFF Stations, and some 9,000 Sprinkler Heads sprinkling the magazines and hangar. Ground tackle and steering close the list, two Anchor Windlasses hauling stud-link Anchor Chain Link chain, and electrohydraulic Steering Gear swinging each rudder.

Habitability

The Crew Accommodation outfit is a small town: 4,600 Berthing Module modules, 1,200 Head Fixtures and galleys serving about 15,000 meals a day, ventilated through 2,800 HVAC Terminals.

Self-defense

The carrier relies on its air wing and escorts for primary defense, keeping only point systems of its own: ESSM Launchers for Evolved Sea Sparrow missiles, RAM Launchers for Rolling Airframe Missiles, three CIWS Mount 20 mm mounts, and Decoy Launchers, all directed from eighty Combat Consoles in the combat direction center.