![Building a series of X-planes fueled by green energy, use half the fuel and are only half as loud, as well as the world’s first "quiet" supersonic X-plane, is part of the budget proposal. Illustration: NASA by Lillian Gipson]()
NASA is planning to embark next year on a bold and exciting research program aimed to reduce fuel use, emissions, and noise. NASA Aeronautics plans to achieve these exciting goals exploring ‘New Aviation Horizons’, a 10 year research program that will changing the way aircraft are designed, built and operated, in the air and on