They are looking to have a model in test this year, and a decision on if/how to proceed in the 2009-2010 time frame.
Seeing as how the open rotor, it's a lot like an advanced turboprop, would give something like a 25% improvement in fuel economy, the advantages are clear. The question is whether or not the related issues, particularly mounting and noise, can be resolved in an advantageous manner.
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