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The Boeing 787 Dreamliner, introduced in 2011, is known for its advanced technology and efficiency. A key aspect of the aircraft’s design is its two engine options: the Rolls-Royce Trent 1000 and the General Electric GEnx. Both engines are high-bypass turbofan models created specifically for the 787, but they differ in several technical and operational aspects.
The Rolls-Royce Trent 1000 is part of the company’s Trent engine family and uses a three-shaft design. This structure supports efficient power generation and improved fuel economy. The engine features a 112-inch fan and has a bypass ratio exceeding 10:1, which helps achieve quieter operation and reduced emissions. Depending on the model, it provides thrust between 53,000 and 78,000 pounds-force (lbf). Durability improvements have been made over time, notably with the Trent 1000 TEN variant—where “TEN” stands for Thrust, Efficiency, and New Technology—aimed at increasing intervals between overhauls.
General Electric’s GEnx engine is also a high-bypass turbofan but uses a two-shaft configuration. It incorporates composite fan blades and cases to reduce weight while maintaining strength. The GEnx offers thrust ranging from 69,800 to 76,100 lbf with a bypass ratio up to 9.0:1. Its overall pressure ratio can reach up to 58.1:1. GE states that the GEnx stays on wing about 20% longer than previous engines due to these material advances and design choices.
