Page "Known Space" Paragraph 44

Faster Than Light ( FTL ) propulsion, or hyperdrive, was obtained from the Outsiders at the end of the First Man-Kzin War.

In addition to winning the war for humanity, it allowed the re-integration of all the human colonies, which were previously separated by distance.

Standard hyperdrive covers a distance of one light-year every three days ( 121. 75 x c ).

A more advanced Quantum II Hyperdrive introduced later is able to cover the same distance in one and a quarter minutes ( 420, 768 x c ).