This high-bypass turbofan engine and its Trent derivatives are widely used on Boeing and Airbus airliners. Its unique "three-spool" construction incorporates one more compressor stage than two-spool designs. While more complex, the three-spool design can produce greater thrust with lower fuel consumption and emissions. The RB.211 was first installed on Lockheed's L1011 TrisStar.
Image Number: SI 2008-372
Credit: Image by Eric Long, National Air and Space Museum, Smithsonian Institution
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