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originally posted by: Zaphod58
a reply to: BigTrain
It's a hybrid. They started with an older design, updated the materials, then during wind tunnel testing they redesigned into a somewhat new aircraft. There are portions that are recognizable as an older design, and parts that aren't.
, that flew for quite a while, quite a while ago, but was subsequently retired, to be revitalized with modern materials and propulsion technology, as zaph alluded to.
the "missing link" between the XB-70 and the Green Lady
originally posted by: MystikMushroom
Maybe this? Getting closer?