The R7-series astromech droid was an astromech droid produced by Industrial Automaton during the Second War. The R7-series was designed specifically for use with the UCN E-wing escort starfighter. Development of the R7-series was a corporate secret, occurring during the media blitz that surrounded production of the R6-series astromech droid. The R7-unit featured two fixed, wheeled legs and a third retractable leg, and were heavily shielded against electrical discharges. These droids were primarily used onboard E-wing starfighters, and required significant modification to work effectively with Starfury, Viper, and most other starfighters. A typical R7 unit could hold up to fifteen hyperspace jump coordinates in its astrogation buffer and survive a near miss from an ion cannon.