The RX-Series pilot droid utilized by the Star Tours organization had its origins in the AC Series pilot droids. It is known that an AC Series pilot droid operated the StarSpeeder 1000 at some point during the period spanning from 19 BBY to 0 BBY.
AC series droids were known to be the most capable, confident, and amiable class three droids available.
Unlike the three-armed, cylinder-shaped RX-Series pilot droids also employed by Star Tours, AC-series pilot droids possessed a humanoid form. The AC unit's head featured a helmet-like design, flattened at the front, incorporating a circular speaker, and two yellow photoreceptors. They incorporated a groundbreaking Intellidor 8 droid brain, sophisticated articulation mechanisms, DV 24 robotic hands, and a disc-shaped power recharge socket on the torso.