- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Experimental propulsion system that if successful would have enabled starships to reach higher speeds with greater efficiency.
The system was tested aboard the U.S.S. Excelsior in the 2280s before being deemed a failure and abandoned.