RX-78 Gundam

The RX-78 Gundam is a series of fictional testbed mobile suits in the Gundam Universal Century developed by the Earth Federation. The titular mobile suit of the series, the RX-78-2 Gundam, is a member of this series. The RX-78-2 Gundam serves as the iconic symbol of the Gundam universe and sparked the creation of its multiple sequels and spinoffs.

Concepts and development

The RX-78's initial concept was that of a powered armor, the primary design for Yoshiyuki Tomino's proposed series Freedom Fighter Gunboy. The series later changed its name to Mobile Suit Gundam and Kunio Okawara was given Tomino's concept to shape into a finalized design for the anime. Okawara created multiple designs before settling on the current, samurai-styled design for the anime in 1979.

One of the common questions asked is why did the enemies in the series keep referring to the RX-78-2 as White while it is a mix of blue, red, and white. Tomino's response in the novel version of Gundam is that the original design was to be a grayscale machine, made up of mostly white and light gray colouring. However, Sunrise disapproved of the colouring and insisted the unit to be painted in brighter colours to attract attention, like other Super Robot anime at that time.

Although the 'original' Gundam, the RX-78-2 design was expanded to be the second in a line of 8 Gundams; preceding model RX-78-1 and later models RX-78-3~8. These were designed by Okawara between 1980 and 1983 for Mobile Suit Variations. Other mechnical designers later added further design variations; including Yutaka Izubuchi's RX-78-NT-1, designed in 1989 for Mobile Suit Gundam 0080, and Shoji Kawamori's and Hajime Katoki's Gundam Development Project designs in 1992 for Gundam 0083. The RX-78-2 has also been redesigned several times by other artists. In particular, the Hajime Katoki's version of the Gundam (referred to by Gundam fans and Bandai themselves as Ver. Ka) has become popular enough to be made into both injection plastic model kits sold by Bandai and resin-based garage kits sold by their B-Club subsidiary. Okawara himself redesigned the Gundam for original character designer Yoshikazu Yasuhiko's manga Mobile Suit Gundam: The Origin, a retelling of the events of the original series. Though mostly identical to the original, it features slightly different designs for its weapons, a small vulcan pod in its shoulder, and the ability to replace one of the beam sabers stored in its backpack with a cannon similar to that of the Guncannon. In addition, the fifteenth installment of the Gundam Evolve series of shorts features another variation on the RX-78's design, a highly stylized version of the iconic machine based on "modern" design aesthetics. It has been referred as Ver. Evolve 15.

Role in plot

The deployment of the Principality of Zeon's mobile suits, the MS-05B Zaku I and the MS-06F Zaku II, in the One Year War had given the small nation a major tactical edge over the much larger Earth Federation. Capable of propellant-less manoeuvring thanks to their AMBAC systems, and able to be retrofitted to suit a variety of missions and environments, they easily outclassed the Federation's arsenal of fighters and ground vehicles. Realizing that the gap needed to be closed, the Federation instituted Project V (short for "Project Victory"), a development program that would produce a counterpart Federation mobile suit design, with the ability for mass-production a requirement. While the ultimate result of the program was the RGM-79 GM, the engineers in the project tested several design concepts for the mass-production units in the RX-78 series. Some of the developments in the RX-78 models were later incorporated into the GM line, but many were scrapped due to cost and/or complexity.

Only 8 RX-78 suits were produced during the One Year War, although continual remodelling and upgrading created the impression that there were more than eight units. Although the RX-78 suits are designated RX-78-1~8, the final digit indicated the design version of the unit, and not the unit's actual number.

In addition, the EFAF (Earth Federation Air Force) created their own RX-78E (GT FOUR/Gundam Transformer/Flight & Operations Unifications Reactors), which is different from the 8 RX-78s produced. Another extra unit is the RX-78XX, which uses scrap parts of the RX-78s, and again is not considered to be one of the original line. The NT-1 is actually RX-78 unit 4 remodelled (original model unknown). After the One Year War, the GP series are numbered after the RX-78 convention, despite being newly produced units.

The variation among the Gundams was originally indicated by differences in colouration, indicating upgrades to completely internal equipment and technology, although later variants displayed externally-visible upgrades. For example, Unit 4's NT-1 configuration have extra thrusters, additional armor, and a 360 degree panoramic cockpit, while Unit 4 and Unit 5, which exist mainly in games and as model kits, provide additional mounting points and weaponry.