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This one is covered in the book "Sled Driver", by Brian Shul as he was the pilot on the flight in question. Brian, an SR-71 pilot and his RSO, Walt, were the crew that experienced this and he loves recounting it with Walt (as they did, completing each other's sentences, when I met them in person at the Frontiers of Flight a few years ago) as it's one of those moments that really solidified why the USAF wanted "bonded" crews that always flew together. Flying a plane that sophisticated was hard enough as it was. If you had a crew that could literally finish each other's thoughts, then that problem became much more manageable than if you used mix-and-match crews as they had been doing prior with other 2-seat aircraft.From AW (Mar 2010):
I met an SR-71 pilot a few years ago. (SR-71 was the USAAF advanced 'stealth' reconnaissance aircraft known as the Blackbird). He told me this story from his first flight with a new co-pilot: An SR-71 and crew were flying over Southern California when a bug smasher came on the airwaves in a dorky voice: Cessna 152: Ground Control, What's my airspeed? Ground Control: 100 at FL 100. A few moments later a cocky voice came on: Mooney M20: Ground Control, What's MY airspeed? Ground Control: 240 at FL 240. By this time the SR pilot was seething, but since communications were the duty of his new co-pilot, he remained silent. A few moments of radio silence passed, and in the calmest voice imaginable the co-pilot keyed in: SR-71: Ground Control, What's our airspeed? Ground Control: 1875 at FL 800. There were no more speed checks called in that afternoon, and the pilot knew that he had a cool partner in the back seat.