Tuesday 7 October 08 - 03:48
 

Propulsion & Power Systems

Rolls-Royce Breaks Through Marine Propulsion Barriers

Rolls Royce has scored two breakthrough propulsion orders with the US Navy, its Kamewa waterjets having been selected to drive the experimental X-Craft high speed aluminium catamaran while its MT30 marine gas turbine has been chosen to power the Integrated Power System (IPS) Engineering Development Model (EDM) for the DD(X) multimission destroyer programme.

The US Navys X-Craft will be driven by Kamewa waterjets.
The US Navys X-Craft will be driven by Kamewa waterjets.

The X-Craft demonstrator may be used to prove technologies for use in the US Navy's Littoral Combat Ship (LCS). Under the contract awarded by prime contractor The Titan Corporation, four high-efficiency Rolls Royce Kamewa 125 SII waterjets will accommodate 50.4 MW of power driving the 73m LOA vessel to speeds of up to 50 knots while also providing enhanced manoeuvrability. The installation of two or more independent units makes sideways movement possible to simplify operations and berthing. Mixed flow type pumps used in Kamewa waterjets provide higher than 90% efficiency ratings.

The X-Craft was designed by UK based Nigel Gee and Associates Ltd and will be built by Nichols Brothers Boat Builders of Washington USA for the US Navy's Office of Naval Research. It will be evaluated for the advanced hydrodynamic performance, structural behaviour, and propulsion systems efficiency of high speed hull form technologies. The waterjets will be built at Rolls-Royce AB in Kristineham, Sweden.

The MT30 order for the DD(X) programme marks the hugely significant Rolls-Royce entry into the US Navy large gas turbine market which has been dominated for decades by GE Marine. It closely follows the MT30's nomination as the main engine for the British Royal Navy's Future Aircraft Carrier project.

Rolls-Royce will provide one 36 MW MT30 generator set to DD(X) lead design agent Northrop Grumman to drive the IPS EDM at the US Naval Surface Warfare Center Philadelphia Division Land Based Test Facility (LBTF).

In addition, the Rolls-Royce 4 MW AG9150 was selected to participate with another 4 MW genet in conjunction with LBTF IPS testing. Rolls-Royce's $25 million contract is part of a $2.9 billion overall contract.

The DD(X) EDM genset will be delivered to Northrop Grumman early in 2005 and is expected to have more than 75% US content. Design, manufacture, assembly and testing will all be performed in America. The MT30 has 80% commonality with the Trent 800 aero engine and is the eleventh engine type Rolls-Royce has derived from core aero engine technology.

MJ Information No: 18134

Images for this article - click to enlarge

The US Navys X-Craft will be driven by Kamewa waterjets.

Unless otherwise stated, all images copyright © Mercator Media 2008. This does not exclude the owner's assertion of copyright over the material.

Related products

For more information on products mentioned within this article visit

Rolls Royce AB

MTU IRONMEN