Model of Lockheed-Georgia nuclear-powered tug aircraft concept towing two Lockheed C-5
Galaxy military transports circa 1980.
The nuclear-tug design shown here has a gross weight of 2 million pounds; 40 percent would be the reactor. The plane would be a seaplane, and would fly only over water. If it were to fly over land, the design would have to include protection for the reactor in the event of a crash, entailing a heavy weight penalty. The nuclear-powered plane assumes advanced nuclear technology.
Without a payload, the nuclear reactor could supply enough power for takeoff and landing.
Source: "New-Technology Monster Transports Will Dwarf Today's Jumbo Jets" by Ben Kovicar,
Popular Science, October 1980.