
1) Star Trek device
Found on
https://www.crosswordclues.com/clue/impulse-drive

There are three practical challenges surrounding impulse drive design: acceleration, time dilation and energy conservation. In the show, inertial dampers compensate for acceleration. These hypothetical devices would have to be set so that the propellant regained its inertia after leaving the craft otherwise the drive would be ineffective. Time dil...
Found on
http://en.wikipedia.org/wiki/Impulse_drive
No exact match found.