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3Michael S Holden.Experimentalstudies in the LENS supersonic andhypersonic tunnels for hypervelocityvehicle performance and code vali-dation.AIAA 2008-2505.
4Modified X-51A waverider ready for next hypersonic testby derek kaufman.http://www.asdnews.com/Hyperson-ic Test.htm//2011-03-19.
5Engine gases leaking into airframe led to early termination of X-51A flight.http://defensetch.org/Engins gases Lea-king…of X-51A Flight//2011-03-17.
6Croft John. Air Force launches mission, opts not to drop X-51A. Flight International, 25, March, 2011.
7Warwick Graham. First X-51A hypersonic flight deemed success. Aviation Week, 26, May, 2010.
