The PurePower engine line is intended to produce some major strides in engine efficiency. The geared turbofan concept is being embraced by most manufacturers as the next step to increase cruise performance. Improvements resulting from improved internal materials and blade geometry adjustments were getting more and more difficult. This offers a major opportunity to advance.
http://www.marketwatch.com/story/pratt-whitney-purepower-pw1200g-engine-takes-to-the-skies-begins-first-flight-test-program-2012-05-02
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