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You may be thinking of the YF-12, which was based off the closely-related-but-not-the-same-at-all A-12 precursor to the SR-71. Brag: I've actually seen a YF-12
by runjake 5y ago
You may be thinking of the YF-12, which was based off the closely-related-but-not-the-same-at-all A-12 precursor to the SR-71.
Brag: I've actually seen a YF-12, up close, at Edwards AFB. NASA used them for testing for many years.
https://en.wikipedia.org/wiki/Lockheed_YF-12 https://en.wikipedia.org/wiki/Lockheed_YF-12