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So this isn’t a surprise. I am a bit surprised that they’re splitting the order roughly 50/50 between A and B, but I guess that’s a good way of hedging their bets if either company’s re-engine program runs into difficulty.

The Pratt & Whitney Geared Turbofan, has run, flown on the wing, and is on schedule for Production "type certificate" for 2013.

They other guys? more tweaks of the same concept, I can't see it. You can't keep upping the pressure ratio etc and magically come up with a 15% reduction where as the Geared Turbofan is a game changer. When it comes to the Leap-X, I am from Missouri, Show Me...