P-s4 twin ion engine

The P-s4 twin ion engine was an ion drive system manufactured by Sienar Fleet Systems and most notably used aboard the TIE/ln starfighters of the Galactic Empire.

The P-s4 engine was an advancement of the SIE-TIE twin ion engine system pioneered by Raith Sienar during the latter stages of the Separatist crisis&mdash;although twin ion engine technology itself traced its roots back to the Sith fighters of the Sith Empire.

The twin ion engine contained no moving parts, and was thus low-maintenance. It was also considered to be the most precisely manufactured propulsion system in the Galaxy. It was rated at 150 KTU for the TIE/ln, and 125 KTU for the TIE/sa bomber.