Originally Posted by
CONSO
I was referring to the the comment re lower lobe being outside the pressurized upper deck .
While that was true re the B-29's, re fore and aft pressure sections- I'm not aware that the 707 and KC 135 pressure hulls were that different being built on the same tooling ..
The 707 and KC-135 are different aircraft designs that happen to share the same family tree. The 707 and the military derivatives such as the E-3 have a lower lobe that is inside the pressure hull.
The apparent similarities between the 707 and KC-135 do cause confusion (see the RJ thread for example). You could say they were almost identical apart from the nose, forward fuselage, fuselage barrel, wings, primary structure, fin, rudder system, tail, overall dimensions et al.