here's some SUGAR. Boeing's Subsonic Ultra Green Aircraft Research aircraft.
Beauty of Future Airplanes is More than Skin Deep
An 18-month NASA research effort to visualize the passenger airplanes of the future has produced some ideas that at first glance may appear to be old fashioned. Instead of exotic new designs seemingly borrowed from science fiction, familiar shapes dominate the pages of advanced concept studies which four industry teams completed for NASA's Fundamental Aeronautics Program in April 2010.
Look more closely at these concepts for airplanes that may enter service 20 to 25 years from now and you'll see things that are quite different from the aircraft of today.
Just beneath the skin of these concepts lie breakthrough airframe and propulsion technologies designed to help the commercial aircraft of tomorrow fly significantly quieter, cleaner, and more fuel-efficiently, with more passenger comfort, and to more of America's airports.
You may see ultramodern shape memory alloys, ceramic or fiber composites, carbon nanotube or fiber optic cabling, self-healing skin, hybrid electric engines, folding wings, double fuselages and virtual reality windows.