The Rolls-Royce Trent 900 is a high-bypass turbofan produced by Rolls-Royce plc to power the Airbus A380, competing with the Engine Alliance GP7000.
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The arrival of the A380 in 2007 was poorly timed. The price of jet fuel had begun to creep up, and by 2007 was floating at around $4 a gallon. This made airlines shy away from the expensive to operate four engine jets of the 80s and 90s, and to look instead to fuel efficiency as a major deciding factor.