Bofors SRB-9 Satyr Combat Search and Rescue Robot


SRB-9-Mk. II armed combat model of the Satyros


ROBOTECH Technical Files

by Tim Wing and Rob Morgenstern, with Pieter Thomassen

edited by Tim Wing


  • Satyr reference file
  • Satyr gallery

Designation: Bofors SRB-9 Satyr Combat Search and Rescue Robot

I. Dimensions:

  • Total Height: 6.5 m
  • Total Depth: 2.6 m
  • Total Breadth: 3.2 m
  • Weight: 11.2 metric tons (SRB-9-Mk. I and II), 17 metric tons (SRB-9-Mk. III)

II. Type:

  • Design: Bofors
  • Builder: Bofors, Proteus Group


  • SRB-9-Mk. I: One person, mountain warfare optimized, unarmed combat search and rescue/engineering robot.
  • SRB-9-Mk. II: Armed combat model upgrading the armor, weapons and drive systems of the Satyros.
  • SRB-9-Mk. III: Heavy armor variant.

III. Service Life:

  • SRB-9-Mk. I: Used by the UN Spacy from 2013-2017 to support mountain offensives and the construction of defensive emplacements in mountainous terrain, adopted by the UEDF in 2018 and used until replaced by the Mark II.
  • SRB-9-Mk. II: Used by the UEDF TC Alpine Division from 2018 until the Invid Invasion.
  • SRB-9-Mk. III: Used by the UEDF TC Alpine Division from 2026 until the Invid Invasion.

IV. Propulsion:

  • Powerplant: 1 x SCE-2P Miniaturized Protoculture-cell energizer
  • Fuel Capacity: 6 Standard Canisters of Protoculture.

Climbing equipment

  • 2 x Climbing hardpoints mounted on the forearms capable of supporting either:
    • Compressed-air-driven Grapples with 15 metric ton rated winches for climbing or equipment retrieval with 45 meters of high strength cable located in the arms
    • or Combination digging/climbing claw for excavation and climbing also located in the arms.
  • Typically, one of each will be mounted.
  • 2 x retractable spikes in wrists to assist in climbing. (Note: these hardened tungsten spikes can also be used as weapons. See below.)
  • 2 x clawed hands to assist in climbing.
  • Provisions to attach spikes in feet to assist in climbing.

V. Performance:

  • Running speed: 110 kph (Mark I and II), 96 kph (Mark III)
  • Protoculture supply: 300 hours operational use.

VI. Electronics:

Sensor Systems:


  • Phillips AllView II multi-band spherical-coverage digital camera system, for medium range all-attitude infra-red imaging, optical and ultra-violet band detection and tracking in Battloid mode HF and C-Band Satellite communications systems for long range communications.

(SRB-9-Mk. II and III)

  • Thomson LT-8 multi-frequency laser ranger and designator.
  • Tactical Electronic Warfare System:
  • Selenia GroundWarrior active/passive sensor jammers.

(SRB-9-Mk. III only)

  • Westinghouse TPG-144 X-band pulse-doppler phased array radar with battlefield surveillance mode. High gain phased arrays and signal processors to deal with harsh mountainous propagation environment.

VII. Armament:

(SRB-9-Mk. I)

  • No weapons are standard built-in beyond the climbing claws. Though the Mark I does have hands with-which to hold gunpods, no systems integration is available for actually aiming them.

(SRB-9-Mk. II and III)

Common optional pods for used by the hands:

  • 1 x Mauser EU-10 Laser Gun Pod. This gun pod fired energy pulses of up to 10 MJ per blast. This gun pod could fire up to 150 times/minute due to the large capacitors mounted on either side of the pod. This was the most common gunpod assigned to these battloids due to its decent penetration capabilities and high rate of fire. The weapon incorporated a carrying handle to assist in transportation and could be attached to an arm in a carrying position.6
  • or 1 x General Electric EU-12 pulse ion cannon gun pod, firing 12 MJ pulses at 130 pulses per second. Specially developed for the SC ground Battloids, this cannon used pulse technology to offset the beam attenuation caused by the lower layers of the atmosphere in which it was used. This pod was utilized in cases where more impact than penetration was required, and was introduced around 2029, although primarily with the combat Battloids first.
  • or 1 x Excavation spade, 3.8 meters long, used as an entrenching tool. Also makes for a formidable hand to hand weapon.

VIII. Armor:

The armor on the SRB-9-Mk. II Satyr is a new development in low-mass composite-materials Chobham plating that became the standard for all Terran mecha after its application to the VQ-6A Vandal. Aside from the respectable protection provided against projectiles, missiles, and other kinetic weapons, this armor is also resistant to plasma globes (annihilation discs), lasers, and to a lesser extent, particle guns, 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 and heavy infantry weapons fire, provides excellent resistance to light mecha-mounted weaponry, such as the Zentraedi 22.3mm HE autocannon round, and fair resistance to medium mecha-mounted weaponry, such as the Valkyrie’s 55mm APFSDS round.

The SRB-9-Mk. III featured a much heavier Chobham armor package than the earlier Satyrs. The armor stops all small arms, heavy infantry weapons fire, and light mecha-mounted weaponry, provides good resistance to medium mecha-mounted weaponry, such as the Valkyrie’s 55mm APFSDS round and poor resistance to heavy mecha-mounted weaponry, such as the VHT-1’s 105mm shell.

The Satyr provides full protection from nuclear, biological, and chemical hazards, using a fully sealed cockpit module activated by radiation and hazardous chemical sensors, or manually when biological warfare conditions are anticipated. The module is also armored and gives the Satyr the option of operating off-planet on the Moon or elsewhere in the system. The internal consumables supplies can provide atmosphere purification for one week maximum on Earth and 48 hours in a hostile environment such as the Moon or Mars.

IX. Development:

The SRB-9 Satyr, commonly known by its nickname “Billy Goat”, at first seems to mirror the CBL-8 Dryad’s mission and capabilities. But whereas the Dryad was originally a non-military construction robot, the Satyr was devised by Bofors as an armored, search and rescue and combat engineer robot from the get go. The Dryad was optimized for jungle and marshy environments, the Satyr on the other hand was meant to be used to reclaim terrain-embedded Zentraedi warships, to help construct defensive emplacements in mountainous terrain and to provide mobile hardened command, control, communications, and intelligence (C3I) relay stations for mountain-based infantry. After the Zentraedi Holocaust and the following years of unrest and uncertainty, many communities desired more protective locations in out of the way locations, such as canyons and blast craters. As such, the Satyr was expected to assist in building these communities, when their duties didn’t keep them occupied elsewhere. With its powerful winches, the Satyr was also used as an armored recovery vehicle and in maintenance areas to lift heavy equipment.

Due to the poor radio propagation environment of mountainous terrain, the Satyr assisted the Alpine forces of the Tactical Corps in maintaining communications between their units. This Battloid was equipped with a powerful communications relay capability, which could be boosted by the addition of high gain whip antennas. It was also equipped with a powerful radar set for a non-combat Battloid that was evidenced by the twin arrays located to either side of the head.

The Mk. I was an unarmed search and rescue/military construction/salvage/mining robot for use in the mountains. The UN Spacy quickly discovered the vulnerability of this mecha in a combat situation without built-in weapon systems. Therefore, Bofors devised an armed refit for this Battloid to assist in mountainous combat arenas like the Andes Mountains. After years of use of the Mk. I and II, the Proteus Group (which formed in a merger between Bofors and Cadillac Gage) designed a newer version optimized for its combat role as well as keeping its engineering capabilities to support the Southern Cross in mountainous terrain, designated the Mk. III. The refit consisted of five tons of additional armor and a short range TPG-144 X-band pulse-Doppler phased array radar.

Visually, the Satyr was a very distinctive mecha. With its large shoulders, clawed arms and hands and long skinny legs it looked very close to its Greek namesake. The feet were long and thin, giving them the agility needed for mountaineering. It also had mounting points on the feet for adding spikes to assist in climbing. The arms could mount either a claw or a grappling hook (usually one of each). It also provided accessories to support an infantry team. Knee rings for mounting ropes and a chest bar for rigging off of. The Satyr had wrist spikes to assist it in climbing as well as fully rotating shoulder and upper arm joints. It was also limited-flight-capable, which proved a life saver any time a pilot found himself involuntarily airborne.

The Satyr saw combat in the Malcontent Uprisings in the upper Andes, fought the Robotech Masters all over the Western Hemisphere and it battled against the EBSIS in Eastern Europe after the Second Robotech War. They acted as search and rescue, combat engineers and as infantry support Battloids. Later, during the Invid Occupation, they served in a limited capacity with freedom fighters where their role in the fighting was not relegated to the mountains. No complete, functional models are known to exist today.

SRB-9 Mk. I Satyr
SRB-9-Mk. I one person, mountain warfare optimized, unarmed combat search and rescue/engineering robot



Robotech (R) is the property of Harmony Gold. Super Dimension Cavalry Southern Cross (R) is the property of Big West Advertising, Tatsunoko Studio and Ammonite studio. This document is in no way intended to infringe upon their rights.

Original artwork by: Kogawa Tomonori, Hiroyuki Kitazume, Miyo Sonoda, Hiroshi Ogawa, Hirotoshi Ohkura and Takashi Ono; Tim Wing; ‘MAJESTIC vulne pro’

Acknowledgement is extended to Peter Walker, Pieter Thomassen and Robert Morgenstern of the unofficial Robotech Reference Guide. Peter Walker, Pieter Thomassen and Robert Morgenstern are given credit for all quotes and paraphrasing of the unofficial Robotech Reference Guide that has been utilized in this publication. 

Images from – This is Animation #10 The Southern Cross, Unspecified Super Dimension Cavalry Southern Cross OSM, Robotech Masters Saga Sourcebook (March 2009), The Robotech RPG Book Four: Southern Cross (September 1987)

Content by Tim Wing and Rob Morgenstern, with Pieter Thomassen, edited by Tim Wing

Copyright © 2000, 1998, 1997 Robert Morgenstern, Pieter Thomassen, Peter Walker; 2016 Tim Wing



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