A fascinating Twitter presence called Soviet Visuals posted this on June 6, 2017. Apparently it’s an “atomic airship” from a 1960s Soviet magazine. The caption: “Atomic ruler of the sky.”
My book barely mentions nuclear-powered flight. The power reactor pioneers I’ve studied judged that notion to be nonsensical. The United States spent a few billion on it before JFK shut it down (rather courageously, I reckon) soon after becoming President in 1960. Clearly the Soviets took longer to see reason.