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RGM-89 Jegan Mass Production Mobile Suit (RGM-89B, -89J, -89K)

I. Dimensions:

Total Height:  20.4 meters 22.3 meters 22.5 meters 21.2 meters 25.6 meters
Total Depth : 5.8 meters 6.2 meters 6.2 meters 5.5 meters 8.6 meters
Total Breadth : 8.8 meters 9.3 meters 9.5 meters 8.5 meters 11.5 meters
Dry Weight : 10.7 metric tons 11.5 metric tons 18.6 metric tons 11.6 metric tons 26.6 metric tons
Operational Weight : 25.3 metric tons 26.1 metric tons 34.2 metric tons 26.2 metric tons 53.2 metric tons

II. Type

III. Service Use

IV. Propulsion



(RGM-89B, -89C)



Main Engines of standard model, plus:


(RGM-89A, -89B)

(RGM-89R, -89FA)


Fuel Capacity:

(RGM-89A, -89B)

(RGM-89R, -89FA)


V. Performance

Running speed: 195 kph 202 kph 168 kph 190 kph 148 kph
Max loiter time: 300 seconds 300 seconds 210 seconds 600 seconds 180 seconds
Jump distance:(*) 250 meters 250 meters 160 meters 350 meters 150 meters
Cell duration:(**) 100 hours 100 hours 100 hours 100 hours 100 hours
Acceleration: 1.93 G 3.1 G 2.4 G 5.9 G 3.4 G
Delta-v capacity: 168.6 kps 151.2 kps 150.3 kps 196.3 kps 122.5 kps
* = Earth-normal conditions and without thrusters
** = Continuous operational use.

VI. Electronics

Radar tracking:


(RGM-89B, -89C, -89R, -89FA)

Optical tracking:

(RGM-89A, -89B)


(RGM-89, -89R, -89FA)

Tactical Electronic Warfare System (TEWS):

(RGM-89A, -89B)

(RGM-89C, -89R, -89FA)

VII. Armament




(RGM -89C)

(RGM-89R, -89FA)

Hand Held Weapons

Beam Saber


(RGM-89A, -89C)




Other Military Cargoes available include:

VIII. Armor

The armor on the RGM-89 is a low-mass lunarium tungsten composite plating that is the standard for most Terran mecha. Aside from the good protection provided against projectiles, missiles, and other kinetic weapons, this armor is also resistant to plasma globes (annihilation discs), lasers, and fair against, particle guns too, owing to the fact that the armor can flake off and evaporate in layers under fire from such high-energy weapons, taking much of the weapon's energy and converting it into the latent heat of sublimation in the armor. The armor stops all small arms fire, and has good resistance to all weapons commonly mounted on combat mecha.

The Jegan provides full protection from nuclear, biological, and chemical hazards, using an overpressure cockpit environment activated by radiation and hazardous chemical sensors, or manually when biological warfare conditions are anticipated. The internal consumables supplies can provide atmosphere for three days maximum.

IX. Development

Following the development of both the RGM-85 Nemo and RGM-86 GM III, Anaheim sought to combine the two unique features these suits used, the Nemo's movable frame and the GM III's backpack thruster unit.  It was thought that by combining these features, one could produce a mobile suit with amazing agility and speed.  A descendant of the GM series of mobile suits , the RGM-89 Jegan was lighter and more maneuverable than any previous model. Although not as well-armed as the previous RGM-86 GM III, the Jegan was an all-around well-performing unit nonetheless.

For weaponry the Jegan kept it quiet simple and basic using most of the standard mobile suit weapons.  An optional head mounted autocannons and a new tachyon rifle which was about 50% more powerful than previous designs.  These helped keep costs low which was key if the Jegan was to mass produced quickly and cheaply.  It also had the ability to use any of the other weapon options such as the rail cannon, missile launcher, and rocket launcher.  The Jegan also used a newer model of tachyon saber which was more powerful and was waist mounted for quick deployment.  The Jegan also had missiles, which, while not as numerous as on the RGM-86, allowed the Jegan to retain its close combat ability.  There was a single three tube launcher located on the right thigh of the mobile suit in addition to the sixteen missiles loaded into the Jegan's shield.  

First built in late 2059, the Jegan delivered on its promise of speed and agility thanks to the use of the backpack system and the movable frame.  During testing it managed to best most adversaries it faced off against including the Gundam Alex and managed to best the Zeta Gundam on one occasion.  With such great ability, the RDF quickly snatched up the design and ordered it into production with the first field units arriving in early 2060.  

During the waning months of 2062, Anaheim refined the Jegan and added additional more powerful thrusters giving the mobile suit phenomenal acceleration and agility.  Dubbed the RGM-89B Jegan Kai, this  mobile suit suffered from shorter range than its predecessor, but had an increased missile payload of 30 missiles when you include the shield launcher.  The Jegan Kai was adopted in 2063 just in time for the first battles of 4th Robotech War.  During the course of this war the Jegan Kai was produced as fast as possible, but the more powerful engines took longer to manufacture and install and were much harder to maintain placing further strain on the RDF supply lines.  However the Jegan Kai remained in service for another two years before it was replaced by the RGM-89R.

Anaheim began looking to take advantage of new tachyon technology to replace the aging GM Cannon II still in use.  First rolled out in 2064 in the mist of the 4th Robotech War, the Jegan Cannon delivered on its promise of increased firepower.  Utilizing a pair of large tachyon cannons, the Jegan Cannon was able to severely damage most small capital ships and pose a credible threat to larger ones when use en masse.  The Jegan Cannon also was used as a medium range artillery unit destroying Marduk ground defenses and mecha.  Of course it did suffer from decreased agility, though not much as it was based on the powerful RGM-89B Jegan Kai which had powerful thrusters.  To compensate for this the Jegan Cannon added armor at key points across the mobile suit body to increase survivability.  The Jegan Cannon served with distinction during the 4th Robotech War assisting in the destruction of many Marduk capital ships and defending positions from Marduk assaults. 

The final variants of the RGM-89 were deployed in early 2066.  RGM-89R was one of the fastest mobile suits ever produced.  Able to accelerate at almost 6Gs it could outrun many of the Marduk mecha and out maneuver them as well.  It used numerous small thrusters to gain its amazing agility and speed.  These thrusters were cheaper and easier to produce and maintain as opposed to those used in the Jegan Kai making it much more well suited suit to the demands of the 4th Robotech War.  The Jegan Custom as it became known replaced the backpack missile launchers with a pair of wrist launchers.  These launchers had increased payload versus the ones on the Jegan Kai.  The Jegan Custom also was designed to use a new rapid firing tachyon rifle firing at up to 50% faster than any of its predecessors.  Although inflicting less damage, it was ideal for use against the swarms of Marduk mecha common to any 4th Robotech War battlefield.  The rifle and the Jegan Custom entered service in mid 2066 and were quickly made the standard mobile suit of the day and by the end of 2066 all of the older Jegan types were removed from service.

The full armor concept made its return in the midst of the 4th Robotech War.  Faced with large numbers of enemies, a more mobile alternative to the SDR-series destroids was needed.  The Full Armor Jegan was developed by both Anaheim and Rheinmetall alongside the RGM-89R.  Using the -89R as a base, the add on armor parts dramatically increase survivability and add a powerful weapons suite.  Centered around 4 nuclear capable Savior missile launchers and a pair of 6 tube Scimitar missile launchers the Full Armor Jegan was able to inflict heavy damage on enemy fleets and mecha.  First deployed with the RGM-89R, the Full Armor Jegan proved deadly against enemy fleets.  The downside to this firepower was that the armor system reduced agility and the armor add on packs proved more difficult to manufacture than first believed.  Despite the downsides, a large number of GBP-08s were made during and after the 4th Robotech War.

 Both the Jegan Custom and Jegan Cannon served throughout the war on all fronts and are scheduled to be retired sometime in the early 2070s.

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Robotech (R) is the property of Harmony Gold. This document is in no way intended to infringe upon their rights.

Layout adapted from Robotech Reference Guide

Content by Jeffrey R. Spillner and Ron Ferrara
Copyright 1998-2001 Jeffrey R. Spillner, Ron Ferrara

Page Last Updated on December 7, 2001 @ 00:00 GMT