N.A.S.A X-43 Hyper-X BREAKING NOTICE: Click here for Popular Mechanics' coverage of the failed X-43 flight. First Flight: N/A Mission: Hypersonic flight through use of air-breathing scam-jet engine Major Accomplishments: N/A THE HYPER-X Project is still in the development stage. The following information is provided by N.A.S.A. Additional Information: NASA has established a multi-year ...