The R1-series integrated and improved on the developments of the P2-series prototype astromech, and was an improvement over the P2, despite its unconventional appearance. To save on research, development, and retooling costs, Industrial Automaton reused the jet black body shells from its long running Mark II reactor drone. The dense shielding of the heavy shell gave the R1 protection against intense radiation. The droid moved about via a treaded unipod, which was slow and often malfunctioned, causing a frequent lack of locomotion.
The center of the R1's design was the Intellex III computer brain, which contained a comprehensive catalog of 500 starship configurations. In addition, the R1 was the first Industrial Automaton astromech able to calculate complex navigational coordinates necessary to complete a single hyperspace jump. It was common for R1 units to be used in the hyperdrive sleds of CloakShape fighters.
Stationed on freighters
On the Sun Runner
An R1 was employed as principal controller of the Sun Runner counterfeit ship fabricated in 23 BBY by Groodo the Hutt for his Jedi-foiled attempt to destroy the orbital Fondor Shipyards. Coming face to face in the ship's control chamber with a 18-year-old lightsaber-wielding Jedi Padawan Anakin Skywalker, the R1 droid triggered a self-annihilating shutdown, antecedent to Skywalker destroying the false Sun Runner itself with a hypermatter reactor-planted proton grenade.
The droid's array of retractable tools made the droids useful technicians, but owners often complained of their obstinate personalities and unreliable method of locomotion. Industrial Automaton promised to address all these issues in their next model, the R2-series.
The recycled construction of the R1 did not give off the impression of sophisticated electronics, but Industrial Automaton did use the model to introduce Binary to the market, which became the standard for all inter-droid communications, which caused the R1 to have a lasting impact on the droid market.
- "Single Cell"—Star Wars Tales 7 (In flashback(s))
- Star Wars: Episode I The Phantom Menace
- Star Wars Adventures 1: Hunt the Sun Runner
- Star Wars: Episode IV A New Hope (First appearance)
- Star Wars Episode IV: A New Hope junior novel (First identified as R1 reactor drone)
- LEGO Star Wars II: The Original Trilogy (Non-canonical appearance)
- LEGO Star Wars: The Complete Saga (Non-canonical appearance)
- "Spare Parts"—Star Wars Adventure Journal 11
- The New Rebellion
- The Star Wars Album (Picture only)
- (Picture only)
- (Picture only)
- Star Wars Official Poster Monthly 9 (Picture only)
- (Picture only)
- Artoo Detoo's Activity Book (Picture only)
- Dark Empire Sourcebook
- Galladinium's Fantastic Technology
- "The History of R-Series Astromech Droids"—Star Wars Adventure Journal 7 (As "R1 astrodroid" and "R1 Astromech Droid")
- Star Wars: Incredible Cross-Sections (As reactor drone)
- The Essential Guide to Droids
- Star Wars: The Action Figure Archive
- Arms & Equipment Guide
- The Official Star Wars Fact File 9 (MAN1, Droid Manufacturers)
- The Official Star Wars Fact File 21 (AST1-2, P2 and R1 Astromech Droids)
- The New Essential Guide to Droids
- Star Wars: The Complete Visual Dictionary
- Star Wars: Complete Cross-Sections (As reactor drone)
- The Complete Star Wars Encyclopedia (As "R1 unit")
- Star Wars: Edge of the Empire Core Rulebook
- Star Wars: Age of Rebellion Core Rulebook
- Star Wars in 100 Scenes