Lockheed CL-1201

[1] Although the Department of Defense does not appear to have records of the study's ultimate outcome, the design itself has nonetheless been cited in several sources.

[2][3] The CL-1201 design project studied a nuclear-powered aircraft of extreme size, with a wingspan of 1,120 feet (340 m).

Power would be derived from the heat generated by a nuclear reactor and transferred to four jet engines near the rear, where it would superheat the air passing through to provide thrust.

The craft would be capable of remaining airborne for extended periods, with an estimated endurance of 41 days.

The logistics support variant would have a conventional heavy transport role, carrying hundreds of troops and their equipment at once.