Powering the Queen Elizabeth Class Aircraft Carriers Prince of Wa Les

Power & Propulsion Sub Alliance POWERING THE QUEEN ELIZABETH CLASS AIRCRAFT CARRIERS PRINCE OF WA LES

d I ch ien Rolls-Royce is proud to be providing a wide range of equipment to the Royal Navy’s new aircraft carriers MOD delivery structure HMS Queen Elizabeth and HMS Prince of Wales.

MT30 Gas turbine – Two per ship Rolls-Royce pioneered the use of aero-derivative gas The Aircraft Carrier Alliance (ACA) turbines in marine propulsion, primarily for naval is a single integrated team formed vessels. The MT30 Gas turbines that will power the Queen from Babcock, BAE Systems, Thales Elizabeth class aircraft carriers are the most powerful UK and the MOD (which acts as both in-service gas turbines in the world. Designed for the 21st partner and client.) It is responsible for century navies, the MT30 integrates the very latest in gas turbine technology to give delivering the Queen Elizabeth class efficiency and reliability with a market leading power to weight ratio. It has been ships to time and cost. designed to minimise maintenance costs and first entered service in 2008 powering the US Navy’s first littoral combat ship – USS Freedom. Produced in Bristol, the MT30 Gas turbine and alternator sets are each located under one of Power & Propulsion the ships islands: Sub Alliance • MT30 Gas turbine derived from the highly successful Trent engine programme • Alternator supplied by GE GE Energy Marine Systems UK (formerly Converteam) • Hydraulic start skid • Fire protection system • UPS (Uninterruptible power supply) The Power and Propulsion Sub-Alliance comprises of Thales UK (acting on behalf of the Main Alliance), Rolls-Royce, GE (formerly Converteam) and L3, and is responsible for the design, procurement, manufacture, integration, test and delivery of the Integrated Power & Propulsion System. Steering Gear – Two per ship Propellers – Two per ship Rolls-Royce supplies a complete range of steering gear – suitable Rolls-Royce is a world leader in propeller design and supplies for all ship sizes and types. For the QE class, we designed and controllable pitch propellers, fixed pitch propellers, and the manufactured the complete steering gear system, integrating two innovative adjustable bolted propeller. Our propellers deliver steering gear rotary vane actuators. good fuel economy, low vibration and noise levels and minimal All steering gears are delivered as a complete system, including cavitation. hydraulic power units, control and alarm systems. The adjustable bolted propeller (ABP) allows the most efficient Rotary vane steering gears are very compact – they include blade matching for optimum efficiency while simplifying integrated rudder carrier bearings (lubricated by the hydraulic installation. It uses a hollow hub with five blades bolted from the system oil) and are typically 50 – 60 per cent of the weight of some inside. Slotted holes in the hub allow the blade pitch angle to be competing designs, with low noise and vibration. Operationally adjusted in service to compensate for variations in hull resistance our rotary vane design ensures full torque is available at all rudder through-life. The propellers’ overall weight is reduced for easier angles. It gives more flexibility, as the steering gear is optimised for shipment, handling and mounting. Individual blades can be the type of rudder it will be used with. Units come in 2, 3 and 4 vane replaced without dry docking. variants with 70°, 45° and 35° rudder angles respectively: The propellers, manufactured in our facility in Sweden, will each • Rolls-Royce Marine RV2600-3 Vane Unit developing a maximum deliver around 50,000 hp - the highest power propeller ever 1845 kNm of torque per unit produced by Rolls-Royce: • Lightweight: typically 50-60 per cent of a RAM-type steering gear • 7m in diameter and weighs 33 tonnes • Bespoke design based on the Type 45 hull cartridge methodology • Made from nickel aluminium bronze • Two independent rudders per vessel • Stepless blade pitch adjustment • Twisted design rudder blade to minimise cavitation effects • Individual underwater blade replacement if damaged

Stabilisers – Four per ship Shaftlines – Two per ship • Hollow bored shafts Four Neptune retractable fins are installed on the QE class, manufactured at our Dunfermline facility. • Bronze liners The Neptune range uses a retractable fin that folds into slots in the • GRP-wrapping hull, flush with the vessel’s side, and is also used for cruise ships • Total weight about 240 tonnes and larger ferries. The one-piece fin is designed to maximise lift • Other products in scope: properties and minimise drag: • Hydraulic couplings & covers • Neptune 400 type with a 11.5m2 fin area • Rope guards • Four fins per vessel mounted as pairs Forward and Aft • Water lubricated bearings • 79 per cent roll reduction @ 18 Knots • Stern seal • Fins retract when not required improving vessel safety when • Plummer bearings manoeuvring • Thrust bearings • Stop-Turn-Lock (STL) equipment Low Voltage (LV) Electrical Power Distribution System The Rolls-Royce electrical capability incorporates a wide portfolio of • One Emergency switchboard - distributing emergency power and skills, products and competencies that range from a capability to supporting electrical supply recovery design and supply electric propulsion systems to the management • 34 Electrical Distribution Centres (EDCs) – providing zone-wide of turnkey contracts delivering onboard electrical power distribution electrical distribution and control solutions. As system integrators, we manage the • 400 Electrical Distribution Panels (EDPs) – the final electrical complete process from the concept design stage to through-life distribution stages support, ensuring the delivery of flexible and efficient solutions that meet all major classification society and military requirements. We • 27 Group Starter Boards (GSBs) – providing efficient control of can act as a prime-contractor for the onboard power generation, ships’ LV motors electric propulsion, LV electrical power distribution and propulsion • 50 Individual Motor Starters (IMSs) – controlling the ships largest products. These products are integrated to deliver optimal system LV electrical machines efficiency, providing the best in performance. • 31 Change Over Switches – supporting essential electrical system The LV electrical power distribution system equipment for QE class reconfigurability has been designed and manufactured at our Portsmouth facility. The • 104 Auxiliary Transformers – for all of the ships mission system scale of the electrical distribution system solution is considerable, and domestic supplies including: • 10 Uninterruptible Power Supply Units (UPSUs) – integrating • Provision of design authority and support capability for all LV energy storage to support all critical mission and safety systems electrical power distribution equipment and specification of • Medical Power Supply Distribution Systems - providing the cabling in support of shipyard outfit supplies to medical facilities • 13 Main Switchboards - each designed to distribute greater than • Two HPSW DG Contactor Panels 4000A

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