I found a clearer version of the graphic:
The blurred text just says "Indicated air speed, IAS" (and I'll be looking forward to your admission that you were wrong 
). Your assertion that the yellow zone is just the difference between Vne and Vd is just that, an unfounded assertion.
I claim that the yellow zone is the margin of safety that results from applying a 1.5 factor of safety to ALL the loads, not just the g-loads, just as FAR 25 requires. That claim is based on what FAR 25 says about limit and ultimate loads and the confirmation from the FAA that 25.305 specifies limit conditions. As always, your counter-claim is based on nothing but your own assertions and repeated misinterpretation of FAR requirements. You persist in ignoring that FAR 25 at the time required planes to be flutter-free up to 1.2 Vd, which wouldn't make any sense -- and would be impossible to meet! -- if Vd was the ultimate case.
And you have yet to substantiate a single claim that you have made about "impossible speeds," most especially including any relevant technical specification or any actual test results. You don't have the nerve to post your claims about 25.305 being ultimate cases anywhere that an engineer can comment, nor to ask the FAA yourself.
On point after point, you have demonstrated that you don't understand this stuff well enough to even discuss it intelligently. Instead, you persist in simply pretending to know the maximum speed of a 767 and make ridiculous claims about plane substitutions for no apparent purpose. Instead of proving your claims, you insist that they are valid unless someone can prove them wrong. I have done that. The technical game is long since over, but I'll keep up this posting game as long as you like.
Edit history
= new reply since forum marked as read