Boeing Cancels Phantom Express Launch Vehicle 2 Years After Winning XS-1...

27 Jan 2020 > 17,248 views 

Scott Manley

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The XS-1 program was a DARPA project to develop a rapidly reusable launch vehicle which could also be used for hypersonic research. Boeing, Northrop Grumman and Masten Space Systems were seen as the main contenders, but Boeing eventually won with a design based on the RS-25 Space Shuttle Main Engine. After 2 years working on the project Boeing stopped, essentially killing the project and leaving another hypersonic aircraft project unfinished. Masten XS-1 Aerothermal Calculations https://www.youtube.com/watch?v=ZjZ43... Colonial Viper CFD: https://www.youtube.com/watch?v=Sbj0d...