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F-111B, an interceptor variant of the Aardvark produced by the TFX program. the speed and range of the F-111 platform were to allow it to intercept supersonic bombers at range. though cancelled, its AIM-54, TF30, and AN/AWG-9 combination would go on to equip the F-14.
Starraker, a late 70s study for a heavy SSTO. it was to both take off and land horizontally, employing turboramjets to reach over Mach 5 before boosting into low orbit with rockets. a lack of requirement and the emergence of less ambitious projects contributed to its cancellation
F-117N, a navalized Nighthawk briefly studied in the wake of the A-12's cancellation. a redesigned wing and horizontal stabilizers were to facilitate carrier operations and more powerful F414 turbofans were to be fitted. ultimately, it was rejected in favor of the Super Hornet.
T-4MS, a design study of Sukhoi's Project 100. emergent from a requirement for a bomber equivalent to the XB-70, this supersonic design was intended to strike carrier groups and conduct reconnaissance. by 1971, this configuration was dropped in favor of the more conventional T-4M