A team from the Massachusetts Institute of Technology, Aurora Flight Sciences and Pratt & Whitney is beginning key wind-tunnel tests to prove whether an innovative aircraft configuration can deliver big fuel-burn reductions without resorting to exotic airframe and engine technology. The MIT-led team developed the twin-aisle "double-bubble" D8 configuration during NASA-funded studies completed in 2010. In those studies, of concepts for aircraft that could enter service around 2035, ...

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