TIE / ln - a more successful modification of the TIE. Visually different from its predecessor, the darker body. Faster and more durable. He still lacks a superluminal velocity. Estimated cost of manufacturing TIE evaluated by specialists from the center of 60000 Imperial credits. There are several specialized versions TIE.
Development and use of fighter aircraft and its modifications partially started a few years before the Battle of Yavin, but it was very small. Small enough to have saved the Empire from imminent collapse of the Death Star.