GE Aviation is working with NASA on a wind-tunnel test program to evaluate counterrotating fan-blade systems for an "open rotor" engine design that hearkens back to their joint efforts a quarter of a century ago. Testing will begin at NASA's Glenn Research Center in Ohio in early 2009 and continue into mid-year, GE said. The company noted that "this is not a full engine test, but a component rig test to evaluate subscale fan systems using GE's and NASA's advanced computational tools and data ...

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