Posted by tourdemars to Airplane at May 2, 2003 12:00 PM

NASA's Revolutionary Aeropropulsion Concepts programme is aiming to produce a fuel cell-powered aircraft the size of a Boeing 737 with zero CO2 emissions. 'We think that fuel cells offer the greater long-term benefit if they can be made to work because they have a higher inherent thermal efficiency than conventional aircraft engines,' said Peter McCallum, deputy head of NASA's propulsion and power projects.