Fly the eco-friendly skies

18 May 2010

1

In what could set the stage for a fundamental shift in commercial aviation, an MIT-led team has designed a green airplane that is estimated to use 70 per cent less fuel than current planes while also reducing noise and emission of nitrogen oxides (NOx).

 
MIT's D ''double bubble'' series design concept is based on a modified ''tube-and-wing'' structure that has a very wide fuselage to provide extra lift. The aircraft would be used for domestic flights to carry 180 passengers in a coach cabin roomier than that of a Boeing 737-800.
Image: MIT/Aurora Flight Sciences

The design was one of two that the team, led by faculty from the Department of Aeronautics and Astronautics, presented to NASA last month as part of a $2.1 million research contract to develop environmental and performance concepts that will help guide the agency's aeronautics research over the next 25 years.

Known as ''N+3'' to denote three generations beyond today's commercial transport fleet, the research programme is aimed at identifying key technologies, such as advanced airframe configurations and propulsion systems, that will enable greener airplanes to take flight around 2035.

MIT was the only university to lead one of the six US teams that won contracts from NASA in October 2008. Four teams - led by MIT, Boeing, GE Aviation and Northrop Grumman, respectively - studied concepts for subsonic (slower than the speed of sound) commercial planes, while teams led by Boeing and Lockheed-Martin studied concepts for supersonic (faster than the speed of sound) commercial aircraft.

Led by AeroAstro faculty and students, including principal investigator Ed Greitzer, the H Nelson Slater Professor of Aeronautics and Astronautics, the MIT team members include Aurora Flight Sciences Corporation and Pratt & Whitney.

Their objective was to develop concepts for, and evaluate the potential of, quieter subsonic commercial planes that would burn 70 per cent less fuel and emit 75 per cent less NOx than today's commercial planes.

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