GTDr 3301 Release addon - Between The Ashes mod for FS2_Open Source

Introduced as a smaller and cheaper cousin of the Phidias, the GTDr 3301's role is very specialized. When the job is too dangerous for a Terran or too small for the Phidias, the 3301s are deployed. Although slightly newer than the original Phidias model, the 3301 is far less advanced and considerably less adaptable. These drones contain only the most basic features and are usually teamed up with Terran construction workers or heavier equipments to assist them in their task. In systems where Phidias drones may not be seen, chances are that there will be 3301s instead.

Hard-light.net --- Wiki Article
Hard-light.net --- Release Thread (Old Version)