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MBR-25 Atma Main Battle Robot (Mk I, II, IV)

I. Dimensions

Total Height :	12.2 meters
Total Depth :	8.5 meters
Total Breadth :	9.0 meters
Dry Weight :	31 metric tons
Operational Weight :	43 metric tons

II. Type

• (MBR-25 Mk I, IV): One/two man, all weather, heavy main battle Destroid mecha. Mass produced version.
• (MBR-25 Mk II): One/two man, all weather, heavy main battle Destroid mecha. Platoon leader version.

III. Service Use

• MBR-25 Mark I: Served with the RDF Marines, Space Marines and Army from 2050 until replaced by the Mark IV.
• MBR-25 Mark II: Served with the RDF Marines, Space Marines and Army from 2050 until replaced by the MBR-30.
• MBR-25 Mark IV: Served with the RDF Marines, Space Marines, and Army from 2059 until replaced by the MBR-30.

IV. Propulsion

Engines:

(MBR-25 Mk I)

• 2 x Icarus Aerospace AST-21 thrusters behind the legs, total thrust 122 kN each.
• Assorted small reaction thrusters and gyroscopes for all-environment maneuvers, attitude adjustment, and stability.

(MBR-25 Mk II, IV)

• 4 x Icarus Aerospace AST-37 thrusters behind the legs and on the top weapon arms, total thrust 293 kN each .
• Assorted small reaction thrusters and gyroscopes for all-environment maneuvers, attitude adjustment, and stability.

Powerplant:

(MBR-25 Mk I)

• 3 x RRD-2 Miniaturized Fusion-cell energizer providing electrical power to the mecha.  Total output, 1800 kW each.

(MBR-25 Mk II, IV)

• 3 x RRD-5 Miniaturized Fusion-cell energizer providing electrical power to the mecha.  Total output, 5000 kW each.

Fuel Capacity:

(MBR-25 Mk I)

• 36 Standard canisters of reaction mass
• 26.3 liters of D2O reactant for fusion engines.

(MBR-25 Mk II, IV)

• 36 Standard canisters of reaction mass
• 25.4 liters of D2O reactant for fusion engines.

V. Performance

VI. Electronics

Radar tracking:

(MBR-25 Mk I)

• Hughes GN/TPG-220 medium range UWB phased array pulse-Doppler, for detection and tracking of targets, and with battlefield surveillance modes.
• Thomson GN/ESM-22 electronic signal masking systems.
• Westinghouse GN/APX-16 IFF friend or foe interrogator.

(MBR-25 Mk II, IV)

• Westinghouse GN/TPG-301 medium range UWB phased array pulse-Doppler, for detection and tracking of targets, and with battlefield surveillance modes.
• Thomson GN/ ESM-36 electronic signal masking systems.
• Westinghouse GN/APX-20 IFF friend or foe interrogator.

Optical tracking:

(MBR-25 Mk I)

• Kodak GN/DOS-3300 multi-band digital camera system, for medium range all attitude infra-red imaging, optical and ultra-violet band detection and tracking
• Thomson GN/LT-7 multi-frequency laser ranger and designator.

(MBR-25 Mk II, IV)

• Phillips GN/DOS-4900 multi-band digital camera system, for medium range all attitude infra-red imaging, optical and ultra-violet band detection and tracking
• Thomson GN/LT-10 multi-frequency laser ranger and designator.

Tactical Electronic Warfare System (TEWS):

(MBR-25 Mk I)

• Loral GN/ALR-26 Radar Warning Receiver (RWR)
• Loral GN/AIR-15 Infra-red Warning Receiver (IRWR)
• Westinghouse GN/ALQ-266(V) active sensor jammer
• GN/ALE-16 Chaff and flare dispenser
• Multiple VHF and UHF antennas
• Bose Loudspeakers producing sound up to 90 decibels.

(MBR-25 Mk II, IV)

• Loral GN/ALR-33 Radar Warning Receiver (RWR)
• Loral GN/AIR-22 Infra-red Warning Receiver (IRWR)
• Westinghouse ALQ-281(V) active sensor jammer
• Tracor GN/ALE-16 Chaff and flare dispenser
• Multiple VHF and UHF antennas
• Bose Loudspeakers producing sound up to 90 decibels.

VII. Armament

Cannons

(Mk I)

• 2 x Smith & Wesson tri-barrel 60mm autocannons:  Mounted on either side of the lower torso of the mecha, the 60mm cannons provide anti-personnel firepower as well as a close range alternative to its other more powerful weapons.  Each cannon can fire at 600 rounds per minute with a 3000 round belt feed.  Ammunition is the standard mix of of Tungsten-coated depleted Uranium Armor Piercing Spin-Stabilized Discarding Sabot (APSSDS), High Explosive Armor Piercing (HEAP) and tracer rounds.
• 2 x Krupp PBC-18 particle beam cannon:  The main weapon of the Atma is a pair of large particle beam cannons mounted on either arm.  The arm mounting gives them a large field of fire covering the entire frontal area of the mecha.  Each cannon fires 250 MJ of particle energy up to 20 times/minute with great accuracy to long ranges of up to 50 km. Can also discharge at half-intensity but at double the normal rate of fire. The cannons are arm mounted and have a large field of fire. Drawing power from the mecha's power system, the particle beam has effectively unlimited ammunition.
• 2 x General Electric 105mm Electromagnetic Rail Cannon: This rail cannon can hurl 75 kg shells distances of up to 10 km at speeds in excess of 100 kps. The available ammunition consists of KCP Kinetic Core Penetrating (hull penetration rounds), KPI Kinetic Penetrating Incendiary (plasma incendiary rounds) and MKEP Multiple Kinetic Energy Penetrator (flechette cluster rounds), the latter as anti-mecha formation weapons. This cannon was intended to be used as a possible complement to the heavy beam weapons. In addition, this accurate weapon can also be used in pin-point attacks against ground targets. Mounted on the arms above the particle beam cannons, the rail guns have a great field of fire with a ammo supply of 30 shells.

(Mk II, IV)

• 2 x General Electric REB-32 laser cannon:  Two semi-fixed laser cannons are mounted on the shoulders beneath the REB-31s. Each cannon can fire pulses of 15 MJ once every second and are powered by the main power supply. Cannons can rotate over 40 degrees of arc and elevate over -40/+90 degrees of elevation.
• 2 x Mauser REB-31 laser cannon:  Two semi-fixed laser cannons are mounted on shoulders of the Atma. Each cannon can fire a 22 MJ pulse every three seconds.  Lasers are powered by the main power supply. Cannons can rotate over 40 degrees of arc and elevate over -40/+90 degrees of elevation.
• 2 x Smith & Wesson tri-barrel 60mm autocannons:  Mounted on either side of the lower torso of the mecha, the 60mm cannons provide anti-personnel firepower as well as a close range alternative to its other more powerful weapons.  Each cannon can fire at 600 rounds per minute with a 3000 round belt feed.  Ammunition is the standard mix of of Tungsten-coated depleted Uranium Armor Piercing Spin-Stabilized Discarding Sabot (APSSDS), High Explosive Armor Piercing (HEAP) and tracer rounds.
• 2 x Krupp PBC-36 particle beam cannon: The main weapon of the Atma is a pair of large particle beam cannons mounted on either arm.  The arm mounting gives them a large field of fire covering the entire frontal area of the mecha.  Each cannon fires 250 MJ of particle energy up to 30 times/minute with great accuracy to long ranges of up to 75 km. Can also discharge at half-intensity but at double the normal rate of fire. The cannons are arm mounted and have a large field of fire. Drawing power from the mecha's power system, the particle beam has effectively unlimited ammunition.
• 2 x General Electric 105mm Electromagnetic Rail Cannon: This rail cannon can hurl 75 kg shells distances of up to 10 km at speeds in excess of 100 kps. The available ammunition consists of KCP Kinetic Core Penetrating (hull penetration rounds), KPI Kinetic Penetrating Incendiary (plasma incendiary rounds) and MKEP Multiple Kinetic Energy Penetrator (flechette cluster rounds), the latter as anti-mecha formation weapons. This cannon was intended to be used as a possible complement to the heavy beam weapons. In addition, this accurate weapon can also be used in pin-point attacks against ground targets. Mounted on the arms above the particle beam cannons, the rail guns have a great field of fire with a ammo supply of 30 shells.

Missiles

(Mk I,)

• 1 x ADIMMS-1 Multi-Missile System: 8 MPM-10 Dirk multi-purpose mini- missiles with infra-red imager. Launch ports are two 2-tube launchers located on legs. 2 missiles ready, with a single reload. Various warhead options.

(Mk II, IV )

• 1 x ADIMMS-2 Multi-Missile System: 36 MPM-23 Dagger multi-purpose mini-missiles combined infra-red imager and active radar homing.  Launch ports are six 3-tube launchers located on top mounted cannons. 3 missiles ready, with a single reload per launcher. Various warhead options.

VIII. Armor

The armor on the MBR-25 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 Atma 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

Developed at the end of the Robotech War as a replacement for the MBR-10 Excalibur, the MBR-25 Atma is a much more versatile and heavily armed destroid than its predecessor. Built by Three Stars Heavy Industries, and adopted by the RDF Army and Marines in 2050, the MBR-25 saw immediate service in the suppressing several failed rebellions and the Anti-UTG and performed admirably.

The initial version of the MBR-25, the Mk I featured mostly heavy weaponry. On the arms are two different weapon systems. A pair of particle beam cannons on the lower portion providing the close range firepower with a pair of rail guns providing the long range anti-mecha power. For anti-personnel firepower the Mk I only had a pair of autocannons which left much to be desired. Against most foes this weapon was adequate, but it lacked the endurance of a laser weapon and as such was soon supplemented by additional firepower. The Mk I also had a pair of mini-missile launchers on the legs to provide close in firepower. The Mk II differed little from its brethren save for more advanced electronics.

The Mk IV which debuted in 2059 had an even better weapon package. While retaining all the weapons mounted on the Mk I, the Mk IV mounted an additional pair of arms on its shoulders which each sported a light and heavy laser cannon for anti-personnel and close in fire support. Each also mounted three mini missile launchers giving the destroid even more firepower. These changes were also supplemented by the upgraded electronics and a new power plant. This craft was even more successful and field conversion kits were issued for all Mk I and Mk II Atma's to make them the new Mk IV.

During the next few years the destroid continued to distinguish itself in combat namely during the Transient War in 2057. However the destroid was not without its problems. It was not as agile as previous designs, but this was not a problem as long it did not face a overwhelming force. However, in 2063 the 4^th Robotech War began and battles were now battles of attrition with the RDF almost always being outnumbered at least 12 to 1 and while the Atma did its best overcome these odds it could not always come through like the new mobile suits and as such it was decided after the war was over to shelve production in favor of the faster and more powerful mobile suits.

Layout adapted from Robotech Reference Guide

Content by Jeffrey R. Spillner
Copyright © 1998-2001 Jeffrey R. Spillner

Page Last Updated on November 13, 2001 @ 11:00 GMT