The twin ion engine of a TIE/ln space superiority starfighter
A type of ion engine known as the twin ion engine was used for the propulsion of starships through space. This sublight drive design saw widespread use in various starfighters. The TIE fighter series from Sienar Fleet Systems utilized this engine, which was responsible for the signature high-pitched shriek associated with those fighters.
The Galactic Empire employed a TIE line model called the TIE/sk x1 experimental air superiority fighter, sometimes referred to as the TIE Striker. This atmospheric fighter had a twin ion engine that produced a blue colored light.