Home›Supersonic and Experimental Aircraft›Propulsion›HydrogenBrowse ByHydrogenFactsHydrogenSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1947 1HydrogenFilter Results2 entriesVehicle TypeAllCrewed Spacecraft (1)Rocket-Powered and Hypersonic Research Aircraft (1)Spacecraft (1)ManufacturerAllRockwell International (1)The Boeing Company (1)MakeAllBoeing (1)Rockwell International (1)YearAll1986 (1)2012 (1)Country of OriginAllUnited States (2)Body StyleAllAircraft (no road body style) (1)Engine ClassAllScramjet (1)StatusAllCancelled (1)Surviving (1)Show ResultsBrowseCompareSelect all 2Boeing Phantom EyeHydrogenRockwell X-30HydrogenSources1. Wikipedia: Sound barriertier 2WikipediaSound barrier, lead section, Yeager 1947 sentenceQuote, Sound barrier, lead section, Yeager 1947 sentenceIn 1947, American test pilot Chuck Yeager demonstrated that safe flight at the speed of sound was achievable in purpose-designed aircraft, thereby breaking the barrier.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.