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Eco-Aviation Channel

CFM upgrade to contribute to 2% reduction in fuel burn on 737NG

By Geoffrey Thomas
Eco-Aviation Today, May 18, 2009, p.4

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 first engine is scheduled to begin ground testing in September. Flight tests will begin in early 2010 at GE Aviation facilities in Victorville, Calif., paving the way for engine certification in the third quarter.