This unconventional design was intended to be directly propelled by a series of explosions of atomic bombs.
It was estimated that the nuclear propulsion system in the Project Orion rocket was strong enough to lift a 4,000-ton payload.
The designers envisaged an exit vehicle that was more like an ocean liner than the streamline, weight-conscious conventional rockets we see today.
The US government considered green-lighting the design, then backed down because of concerns over nuclear fallout.