Aerodynamic planes? Lockheed steps it up a notch.
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Three industry teams spent 2011 studying how to meet NASA's goals for making future aircraft burn 50 percent less fuel than aircraft that entered service in 1998, emit 75 percent fewer harmful emissions; and shrink the size of geographic areas affected by objectionable airport noise by 83 percent.
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NASA - Down to Earth Future Aircraft
(check out the smooth underbelly pan on number 7) 
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