A tricyclic plasma drive was the warp drive propulsion system utilized by Suliban stealth vessels in the 22nd century.

In 2151, one of these vessels intercepted Enterprise on its way to return the Klingon courier Klaang to Qo'noS, allowing Suliban soldiers to infiltrate Enterprise and kidnap Klaang. Analyzing their sensor logs, Sub-Commander T'Pol and Commander Charles Tucker determined that, if they could determine the decay rate of the plasma utilized by the Suliban ship, they would be able to detect its warp trail. However, as Enterprise's sensors were not initially designed to measure plasma decay, this necessitated modifications be made to the sensors. (ENT: "Broken Bow")

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