CFM International last month launched its CFM56-7B Evolution engine enhancement program for EIS in mid-2011. The new engine, in combination with aerodynamic refinements to the 737NG, will burn 2% less fuel. Key to the improvement is the use of advanced computer codes and 3-D design techniques to improve airfoils in the high- and low-pressure turbines to lift engine performance. Also, CFM is improving engine cooling techniques and reducing parts count to achieve lower maintenance costs. The ...

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