https://www.instagram.com/p/DUj0kKHiXvB ... IwNjQ2YQ==
I just learned that the 747 prototype at the Museum of Flight was used to test the aerial refueling capability of the SR-71.
The caption on this photo reads:
“On Jul. 6, 1972, Mery Evenson and Coz Mallozzi flew SR-71 Blackbird test airframe ‘955 on a 3-hour sortie, checking out refuelling flight envelope and ‘dry-boom’ contact checks with the boom-equipped Boeing 747.”
I didn’t know any of this, so I never looked for it. Next time I’m in Seattle, I’ll get some better photos.
Been to the Museum 3 times, never noticed it.