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Old 22nd Mar 2022, 18:12
  #21 (permalink)  
tdracer
 
Join Date: Jul 2013
Location: Everett, WA
Age: 68
Posts: 4,427
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I'd put in a vote for the XB-70. Mach 3 bomber, half a million pounds, stainless steel construction, variable geometry - all in the early 1960's. It also looks awesome...
Not quite a one-off since they built two, but only one survives today.
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