Kramer PAD Drive

The Kramer-PAD Drive is the propulsion powerhouse of these interstellar vessels. PAD stands for Particle acceleration drive. This fusion-based system is ingeniously designed to use plasma acceleration for space travel, setting new standards for efficiency and capability. With nearly inexhaustible energy from the fusion reactors and cheap and easy to store propulsion mass, it is possible to maintain high G acceleration over a long period of time.
For longer journeys nothing beats the stellar projectors, for manoeuvring and shorter trips near gravitation wells this drive is irreplaceable. Clever steering of the exhaust torch through magnetic manipulators, gentle course corrections are possible. Sharper turns need auxiliary steering drives located along the ship's axis.
The drive exhaust torch is a clear giveaway for presence and direction vector of a ship. There is no way to mask this thing. Stealth approach on a Kramer PAD is just not possible. Even worse, the torch energy signature can allow inference on the drive's manufacturer, energy output and sometimes even the individual drive. The latter takes time for information gathering and analysis.