TIE fighters are named after their unique propulsion system, the Twin Ion Engine. Ionized gasses are accelerated to a fraction of lightspeed in microparticle accelerators. The fast-moving particles are then emitted from the rear vents to move the fighter forward. Pilots can direct the ion particles in any desired direction making the craft highly manoeuvrable. Because of the relatively low mass of the ship, the twin ion engine design achieves great speed and maneuverability, making it faster than most commercially available spacecraft. This low mass however does come at a price. Even though the hull and solar panels are armored, the ship carries no deflector shields. This is compensated for by TIE pilots with evasion maneuvers and rapid course changes, but in reality they have to rely on shooting first and attacking in large numbers. It is also an accepted fact that amongst TIE pilots, the casualty rate is high.
Easily recognized by their hexagonal solar power panels, the TIE-Ln model has become the standard support fighter for the Imperial Navy. It uses a separate power generator for its laser cannons. Next to the Imperial Stormtrooper, the TIE fighter is one of the symbols of the might and omnipresence of the Galactic Empire.