Editing NASA X-43 (section)

==Development==
The X-43 was a part of NASA's Hyper-X program, involving the American space agency and contractors such as [[Boeing]], Micro Craft Inc, [[Orbital Sciences Corporation]] and [[General Applied Science Laboratory]] (GASL). Micro Craft Inc. built the X-43A and GASL built its engine.

One of the primary goals of NASA's [[Aeronautics Enterprise]] was the development and demonstration of technologies for air-breathing hypersonic flight. Following the cancellation of the [[National Aerospace Plane]] (NASP) program in November 1994, the United States lacked a cohesive hypersonic technology development program. As one of the "better, faster, cheaper" programs developed by NASA in the late 1990s, the Hyper-X used technology and research from the NASP program which advanced it toward the demonstration of hypersonic air breathing propulsion,<ref>{{cite book |last=Peebles |first=Curtis |author-link=Curtis Peebles |title=Eleven Seconds into the Unknown: A History of the Hyper-X Program |location= Virginia |publisher= AIAA |year= 2010 |isbn= 978-1-60086-776-7}}</ref>

The Hyper-X Phase I was a NASA Aeronautics and Space Technology Enterprise program conducted jointly by the [[Langley Research Center]], [[Hampton, Virginia]], and the [[Dryden Flight Research Center]], [[Edwards, California]]. Langley was the lead center and responsible for hypersonic technology development. Dryden was responsible for flight research.

Phase I was a seven-year, approximately $230,000,000 program to flight-validate [[scramjet]] propulsion, hypersonic [[aerodynamics]] and design methods.
Subsequent phases were not continued, as the X-43 series of aircraft was replaced in 2006 by the [[Boeing X-51|X-51]].