Pratt & Whitney (P&W) has reacted angrily to CFM’s assertions that its Leap-1A engine for the Airbus A320NEO will be up to $4 million cheaper to operate over 15 years than the competing PW1100G on a per-aircraft basis. “Effectively, they’re defying the laws of physics and the laws of economics,” says P&W President David Hess. The geared turbofan has six fewer stages than the conventionally configured CFM engine. “That’s 25% fewer stages and 2,000 fewer airfoils–or 50% fewer. ...


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