Solomon “Sol” Epstein was the inventor of the Epstein Drive, a modified fusion drive.
A Jewish man born on Mars, Epstein was an engine engineer for Masstech for at least a decade before he started spending his free time implementing his design for a magnetic coil exhaust acceleration to increase drive efficiency, enabling spaceships to sustain thrust throughout the entire voyage.
After finishing his design, Epstein outfitted his private three-man yacht with the Epstein drive and turned it on, launching it out into the solar system at a marginal percentage of the speed of light. He was, however, unable to turn the engine off, and never returned.
The plans for the Epstein drive were discovered on his home computer by his wife Caitlin Esquibel, and the mass production of the drive enabled humans to populate the solar system.
Within a system, distances are measured in AU (150 million kilometers, about 92 million miles).
Speeds and Travel Time
To calculate travel time within a system, use the following
(distance in AU * 10)/ship epison drive die = travel in days
So for example to travel from Earth to Jupiter (3.8AU) @D4
(3.8 * 10)/4 = 9.5 days