A Convair illustration of the Model 54, a proposed operational version of the NX-2 nuclear powered aircraft. The Model 54 was a missile carrier, but with an internal bomb bay. It was also strictly subsonic, so its survivability over Soviet territory would undoubtedly have been seen as minimal in the supersonic-obsessed 1950’s. By carrying long-range cruise missiles (type unclear), the Model 54 could spend days orbiting outside Soviet controlled airspace and, when war breaks out, dash in at low altitude, unleash its missiles hundreds of missiles from the target (and from the air defenses), and then run home. Of course, the Model 54 was never built.
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