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Rolls-Royce Trent

Rolls-Royce Trent is a three-spool, high bypass turbofan aircraft engines manufactured by Rolls-Royce plc. All are developments of the RB211 with thrust ratings of 53,000 to 95,000 pounds-force. Versions of the Trent are in service on the Airbus A330, A340,A380, Boeing 777, and 787, and variants are in development for the forthcomingA350 XWB.
All the engines in the Trent family share a similar layout, but their three-spool configuration allows each engine module to be individually scaled to meet a wide range of performance and thrust requirements. For example, the large 116-inch diameter fan of the Trent 900 keeps the mean jet velocity at take-off at a relatively low level to help meet the stringent noise levels required by the Airbus A380's customers. Similarly, core size changes enable the HP turbine rotor inlet temperature to be kept as low as possible, thereby minimising maintenance costs.