Nasa is inviting study proposals to identify concepts enabling commercial airliners to fly more economically by 2025.
The research projects will suggest advanced vehicle concepts that can operate with the next-generation air transportation system (NextGen).
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The concepts will meet new environmental goals including reducing fuel consumption and NO2 emissions by 50%, and noise pollution by 80%.
NextGen is a US Government air traffic modernisation effort that includes Nasa.
Nasa plans to select up to four teams for 12-month studies beginning in 2011, which will be able to propose subscale flight demonstrator designs in nine months.
Nasa will then select one or two concepts for 17 months of preliminary design work and risk reduction testing for completion by mid-2013.
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By GlobalDataTests on the demonstrator will include separation assurance, collision avoidance, command, control and communications, remote pilot and vehicle interfaces, and environmental hazards detection that could enable routine operation of future unpiloted air vehicles.
Nasa anticipates conducting test flights with the demonstrator in 2015.
