Gary,
You know a hell of a lot about celestial navigation, but you are wrong on the relationship between the 707 and the C-135.
They were parallel developments and used completely different stress calculations, due to the fact that the C-135 was expected annually to fly about
one tenth of the hours the civil 707 would be flown resulting for example in different aluminum alloys being used for the wings (see ISBN 0-85177-804-6 Peter M Bowers "Boeing Aircraft since 1916" p 463). They also had different cabin cross sections.
The true military version of the 707 was the C-137.
Ronald
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