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Rolls-Royce RB211-535E

There are over 1100 Rb211-535 powering over 500 Boeing 757 aircraft around the world, with more than 40 operators.  This represents roughly 60% of the 757 population. RB211-535 engines have logged over 63 million flight hours and over 24 million flight cycles, and is regarded as one of the world's most reliable turbfan due to it's high time on-wing.

As well as a featuring a destaged IP compressor, the -535E4 was the first engine to incorporate a hollow wide chord, unsnubbered fan to improve efficiency. It also featured the use of more advanced materials, including titanium in the HP compressor and carbon composites in the nacelle. Later engines incorporate some features, such as FADEC, from improved models of the -524.