Hypersonic Aircraft Timeline
January 1946
Picture
January 19 (Saturday)  
X-1 First flight
November 1955
Picture
November 18 (Friday)  
X-2 First powered flight
September 1956
Picture
September 21 (Friday)  
X-2 Retired
December 1956
Picture
December 1 (Saturday)  
X-15 Construction complete
November 1958
Picture
November 6 (Thursday)  
X-1 Final flight
December 1968
Picture
December 1 (Sunday)  
X-15 Retired
May 2010
Picture
May 26 (Wednesday)  
X-51 First flight


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