Enzmann Spaceship

The Enzmann starship is a concept for a manned interstellar spacecraft proposed in 1964 by Dr. Robert Enzmann. A three million ton ball of frozen deuterium would fuel nuclear fusion rocket engines, which were contained in a cylindrical section behind that ball with the crew quarters. It would be longer than the 449 m (1,473 ft) Empire State Building—the craft would be about 2,000 feet (600 m) long overall. The ball of frozen deuterium powered thermonuclear powered pulse propulsion units, similar to Project Orion engines.The spacecraft would have been assembled in-orbit and was part of a larger project preceded by interstellar probes and telescopic observation of target star systems.The rest of the spacecraft was attached behind the ball, a seamless metallic fuel tank. The proposed method of tank construction would be to expand a plastic balloon in space then coat it with metal. The spacecraft would be modular, and the main living area would be three identical 300 feet (91.4 m) wide and long cylindrical modules.The Enzmann could function as an interstellar ark, supporting a crew of 200 but with space for expansion.