SpaceRef - Astronautics - Advanced Launch Systems

SpaceRef - Astronautics - Advanced Launch Systems - X-43

NASA "Hyper-X" Program Established - Flights Will Demonstrate Scramjet Technologies - Press release describing NASA's Hyper-X, X-43 hypersonic test program.

NASA LaRC X-43 Hyper-X photo gallery - This site provides still images and movies of the X-43 hypersonic demonstrator program. NASA Langley Research Center.

NASA X-43 Hyper-X program - This site provides a one page description of NASA's advanced X-43 air breathing hypersonic demonstration program.

X-43 Hyper-X photo gallery - This NASA site provides photos of the X-43 hypersonic research vehicle through design, construction, and testing phases of its development.

X-43 Hyper-X Program - This informative website at the Federation of American Scientists describes the X-43 program as seeking to "demonstrate 'air-breathing' engine technologies that promise to increase payload capacity or reduce vehicle size for the same payload for future hypersonic aircraft and/or reusable space launch vehicles."