BAE Systems has chosen a variety of NATO-approved anti-vibration and shock mounts from Trelleborg Industrial AVS for the UK's new QE Class aircraft carriers.
Trelleborg's Metalastik®Super D and DX mounts are being installed in applications including the emergency diesel generator sets, the HPSW (high pressure salt water) intermediate pumps and the HPSW diesel generators. The mounts are supplied by Trelleborg Industrial AVS pre-compressed to allow easy installation, so saving considerable amounts of installation time at the shipyard.
Gerrit Timmer, Marine Market Manager for Trelleborg Industrial AVS commented: “Our naval products meet the highest standards of reliability, acoustic efficiency and shock protection in accordance with NATO and US MIL specifications as well as those of the civil certification authorities. They embody unsurpassed experience in shock attenuation and vibration isolation for naval and coastguard applications from assault craft to modern frigates, and from supply ships to the specialist and anti-magnetic technologies required in mine-hunting, submarines including the latest Astute Class and US Navy LHD8 and LCS vessels.”
Metalastik® Super-D mounts have a long track record in naval applications, including the French aircraft carrier, General Charles de Gaulle. They are large rubber/metal bonded assemblies capable of nominal static deflection of 23mm and up to 50mm shock excursions in any direction. Trelleborg Industrial AVS introduced the DX mount more recently to combine an innovative, modular design with increased shock displacement – up to 100mm. Both mounts are widely used under large engine/alternator sets, machinery rafts and command modules.
The QE Class will consist of two ships, HMS Queen Elizabeth and HMS Prince of Wales. With a displacement of approximately 65,600 tonnes, they will be the largest warships ever built in the UK. There will be two deck lifts and the vessels will be able to operate a mixed air-group of up to 40 aircraft.
The core of the carrier's IFEP propulsion system (integrated full electric propulsion) will be two Rolls-Royce Marine Trent gas turbines and four Wärtsilä diesel generator sets generating 11,000 volts. This power drives the ship's domestic system as well as the induction motors on the propeller shafts. This propulsion system eliminates the need for large gearboxes and is very fuel-efficient.
BAE Systems is a member of the Aircraft Carrier Alliance, working in partnership with Babcock, Thales and the Ministry of Defence to deliver the QE Class programme. BAE provides overall leadership, programme management and also plays a central role in the design and build of the ships.