The first to suffer was NASA chief test pilot Joe Walker in his F-104N, as it rolled inverted across the back of the XB-70. The F-104’s T-tail ripped at the Valkyrie’s drooped right wingtip ...
The XB-70 program was not without problems ... and the remaining one ended its career after 83 flights — many of which with NASA as a supersonic testbed — and just over 160 hours in the ...
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