Engines

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Compact Engine

The Compact Fusion Engine (CFE) is mechanically similar to a Fusion Engine but uses much denser radiation shielding. The Compact fusion engine is 50% heavier for the same performance, but occupies less space in the center torso and is less likely to receive a critical hit.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 1
Install Location: Center Torso
Value: 625,000
Gear ID: emod_engineslots_compact_center


Equipped Effects:

  • +25% walk speed
  • +50% engine weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Engine Dense (S)

The Sanctuary Worlds are not without their innovations and though fusion engine technology has long been considered a solved technology by the Inner Sphere the Sanctuary Worlders kept tinkering with it. Eventually, they discovered that by incorporating a heat sink and a heat negator into the engine block and by compacting the reactor they could develop a unique engine that boosted engine power as well as provided some cursory heat management benefits. Naming it the Dense Engine, the Sanctuary Worlders began using it on various combat units to great effect.

Manufacturer: Sanctuary Manufacturing
Tonnage: 0
Critical Slots: 2
Install Location: Center Torso
Value: 1,000,000
Gear ID: emod_engineslots_dense_center


Equipped Effects:

  • +15% Walk Speed
  • +25% Engine Weight
  • -5 Heat Sinking Per Turn
  • -1 Heat at the end of the turn

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Fission Engine

Fission engines are a rarely seen piece of engine technology. Originally the predecessor to the much more widely accepted fusion engine, the fission engine is extremely fuel efficient and relatively inexpensive to both fabricate and operate, making them fairly popular for support vehicles and the occassional IndustrialMech. Compared to fusion however, the fission engine has few advantages and many downsides, such as high doses of dangerous radiation, making them rarely seen on combat units such as BattleMechs.

Manufacturer: Vlar
Tonnage: 0
Critical Slots: 3
Install Location: Center Torso
Value: 450,000
Gear ID: emod_engineslots_fission


Equipped Effects:

  • +80% engine core weight
  • -20 heat at the end of the turn
  • Fission engines cannot make use of any heat sink systems other than standard heat sinks. They also cannot use any e-cooling, heat bank, or heat exchanger equipment.

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'Mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Fuel Cell Engine

Fuel Cell engines are primarily used in civilian applications like rail systems, personal transport, and IndustrialMechs. Fuel Cell engines generate electrical power that is then used by the vehicle to operate its propulsion system. A Fuel Cell engine has several advantages over the typical Internal Combustion Engine. While they require an oxidizer to operate, they are readily able to accept a stored oxidizer along with their fuel, making it a good choice for submarines, satellites, and naval applications. As most fuel cells run on hydrogen and oxygen, they have no exhaust other than water vapor so Fuel Cells are also used as generators for buildings and other large structures. You cannot use additional Cooling Kits, Exchangers or Heat Banks on a 'Mech with a fuel cell engine.

Manufacturer: Vlar
Tonnage: 0
Critical Slots: 3
Install Location: Center Torso
Value: 450,000
Gear ID: emod_engineslots_FuelCell


Equipped Effects:

  • +60% engine core weight
  • -20 heat at the end of the turn

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'Mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


I.C. Engine

For all intents and purposes identical to a modern internal combustion engine, the I.C.E. in BattleTech is used mainly for conventional vehicles and IndustrialMechs. Its power output is less than a fusion engine of similar mass, meaning an I.C.E. needs to be heavier in order to have the same engine rating of a fusion engine.

Manufacturer: Vlar
Tonnage: 0
Critical Slots: 4
Install Location: Center Torso
Value: 250,000
Gear ID: emod_engineslots_ICE_center


Equipped Effects:

  • x2 engine core weight
  • -20% movement speed
  • +15% heat generated from weapons fire

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Jury-Rigged XL Engine

During the technology revival of the 3050s many technologies were rediscovered and put back into wide production. Among these was the Extra-Light Engine. However, the reactor shielding was complex on the XL and was beyond the capacity of many smaller manufacturers to make. Therefore, this type of engine was created, the so-called Jury-Rigged XL (JRXL). While actually a production model, it is called jury-rigged because it uses extremely bulky but lightweight materials to reproduce the effect of the more advanced and capable standard XL. The Jury-Rigged XL has only one real advantage over its more conventional cousin, which is ease of installation since it was designed to be quickly and cheaply installed.

Manufacturer: Periphery Armory, Inc.
Tonnage: 0
Critical Slots: 16 (4 CT + 12 ST)
Install Location: Center Torso
Value: 500,000
Gear ID: emod_engineslots_juryrigxl_center


Equipped Effects:

  • -50% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated

Notes:

  • JRXL engines take up 4 critical slots in the center torso and 6 in each side torso
  • Destroying either side torso of a 'mech with a JRXL engine renders it incapacitated, much in the same way as destroying the CT would, but provides more mech parts to salvage
  • While CASE doesn't prevent a 'mech with a JRXL engine from being incapacitated due to losing a side torso, it does stop spill-over damage from the side torso continuing into the CT preventing the 'mech from taking critical damage. More info on this can be found here


Found On These 'Mechs: (Click Expand For List)


Land Air Mech Engine

LAM engines are highly specialized pieces of equipment only found as fixed gear on LAM 'Mechs.

Manufacturer: Allied Aerospace
Tonnage: 0
Critical Slots: 4
Install Location: Center Torso
Value: 500,000
Gear ID: emod_Engine_LAM


Equipped Effects:

  • +20% jump distance
  • +1 evasion pips gained from movement
  • DFA self damage reduced by 25

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Light Engine

The Light Fusion Engine (LFE) is mechanically similar to an XL Engine, but uses Lostech energy shielding to allow a mech to survive the destruction of a side torso. The Light Fusion engine is 75% the mass for the same performance, but intrudes into the side torso bays of a BattleMech.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 8 (4 CT + 4 ST)
Install Location: Center Torso
Value: 937,500
Gear ID: emod_engineslots_light_center


Equipped Effects:

  • -25% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated

Notes:

  • Light engines take up 4 critical slots in the center torso and 2 in each side torso, this makes it quite somewhat vulnerable to side torso damage
  • 3 critical hits on the engine will also incapacitate the 'mech, providing full salvage in the same way a headshot would
  • Destroying a single side torso does not incapacitate a 'mech with a Light engine as there are only two critical slots in each side. Destroying both side torsos however will incapacitate the 'mech. (The Clan XL engine works the same way)


Found On These 'Mechs: (Click Expand For List)


Primitive Engine

Compared to their Star League and Succession War-era counterparts, Primitive Engines are larger and less efficient; typically, modern engines are 80% the size of these early engines for the same amount of power.

Manufacturer: Vlar
Tonnage: 0
Critical Slots: 6
Install Location: Center Torso
Value: 150,000
Gear ID: emod_engineslots_Primitive_center


Equipped Effects:

  • +20% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Prototype XL Engine

During the technology revival of the 3050s many technologies were rediscovered and put back into wide production. Among these was the Extra-Light Engine. However, the reactor shielding was complex on the XL and was beyond the capacity of many smaller manufacturers to make. Because of this issue, some smaller manufacturers put very early prototype engine designs into production instead due to ease of construction. These prototype XL engines were flawed and created extraneous waste heat, unlike the later perfected models, but were cheaper and easier to produce and install, meaning they found acceptance in Periphery militaries despite these limitations.

Manufacturer: Periphery Armory, Inc.
Tonnage: 0
Critical Slots: 10 (4 CT + 6 ST)
Install Location: Center Torso
Value: 500,000
Gear ID: emod_engineslots_protoxl_center


Equipped Effects:

  • -50% engine core weight
  • +8 Heat Per Turn

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


XL Engine

The Extralight Fusion Engine is mechanically similar to a Fusion Engine but uses much lighter radiation shielding. The XL fusion engine is half the mass for the same performance. The XL fusion engine is twice as large as the standard fusion engine and intrudes into the side torso bays of a BattleMech, exposing the 'Mechs to catastrophic engine damage from side torso structural damage that would be otherwise survivable.

Manufacturer: Lostech
Tonnage: 0
Critical Slots: 10 (4 CT + 6 ST)
Install Location: Center Torso
Value: 500,000
Gear ID: emod_engineslots_xl_center


Equipped Effects:

  • -50% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated

Notes:

  • Inner Sphere XL engines take up 4 critical slots in the center torso and 3 in each side torso, this makes it quite vulnerable to side torso damage
  • 3 critical hits on the engine will incapacitate the 'mech, providing full salvage in the same way a headshot would
  • Destroying either side torso of a 'mech with an XL engine renders it incapacitated in the same way three critical hits would, however the loss of a side torso reduces salvaged parts by 1
  • While CASE in a 'mech with an XL engine won't prevent it from being incapacitated if ammo does explode, the CASE acts as insurance that you'll be able to recover the 'mech afterwards. More information on the subject can be found here


Found On These 'Mechs: (Click Expand For List)


XL Engine (C)

The Clan XL fusion engine is 66% larger than the standard fusion engine and while it intrudes into the side torso bays of a BattleMech, it takes up less space and is less vulnerable to side torso damage than its IS counterpart.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 7 (3 CT + 4 ST)
Install Location: Center Torso
Value: 2,500,000
Gear ID: emod_engineslots_cxl_center


Equipped Effects:

  • -50% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated

Notes:

  • Clan XL engines take up 3 critical slots in the CT and 2 in each side torso, making it vulnerable to side torso damage but not to the same degree as an IS XL engine
  • 3 critical hits on the engine will also incapacitate the 'mech, providing full salvage in the same way a headshot would
  • Destroying a single side torso does not incapacitate a 'mech with a Clan XL engine as there are only two critical slots in each side. Destroying both side torsos however will incapacitate the 'mech. (The light fusion engine works in a similar fashion)


Found On These 'Mechs: (Click Expand For List)


XL Engine (S)

The Sanctuary Worlders took Extra-Light Engine technology with them on their great journey out of the Inner Sphere. Over time, their reproductions of the technology changed into this, the Sanctuary XL Engine. More compact than an Inner Sphere XL engine, the Sanctuary XL can withstand more damage than the IS XL can. However, the engine spreads power out somewhat, reducing effective power to the motive systems which reduces the equipped unit's walk speed somewhat.

Manufacturer: Sanctuary Manufacturing
Tonnage: 0
Critical Slots: 7 (3 CT + 4 ST)
Install Location: Center Torso
Value: 1,000,000
Gear ID: emod_engineslots_sxl_center


Equipped Effects:

  • -50% engine core weight
  • -10% Walk Speed

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated

Notes:

  • Sanctuary XL engines take up 3 critical slots in the CT and 2 in each side torso, making it vulnerable to side torso damage but not to the same degree as an IS XL engine
  • 3 critical hits on the engine will also incapacitate the 'mech, providing full salvage in the same way a headshot would
  • Destroying a single side torso does not incapacitate a 'mech with a Sanctuary XL engine as there are only two critical slots in each side. Destroying both side torsos however will incapacitate the 'mech. (The light fusion engine works in a similar fashion)


Found On These 'Mechs: (Click Expand For List)


XXL Engine

The Extra-Extralight Fusion Engine is mechanically similar to a Fusion Engine but uses much lighter radiation shielding. The XXL fusion engine is one third the mass for the same performance, but extrudes into the side torsos of a BattleMech and produces prodigious additional waste heat.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 16 (4 CT + 12 ST)
Install Location: Center Torso
Value: 3,500,000
Gear ID: emod_engineslots_xxl_center


Equipped Effects:

  • -66% engine core weight
  • -20 heat sinking per turn

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'Mech is incapacitated

Notes:

  • Inner Sphere XXL engines take up 4 critical slots in the center torso and 12 in each side torso, this makes it quite incredibly vulnerable to side torso hits and restricts available space in the 'Mech by a lot
  • 3 critical hits on the engine will incapacitate the 'Mech, providing full salvage in the same way a headshot would
  • Destroying either side torso of a 'Mech with an XXL engine renders it incapacitated in the same way three critical hits would, however the loss of a side torso reduces salvaged parts by 1
  • While CASE in a 'Mech with an XXL engine won't prevent it from being incapacitated if ammo does explode, the CASE acts as insurance that you'll be able to recover the 'Mech afterwards. More information on the subject can be found here


Found On These 'Mechs: (Click Expand For List)


XXL Engine (C)

The Clan Extra-Extralight Fusion Engine is mechanically similar to a Fusion Engine but uses much lighter radiation shielding. The cXXL fusion engine is one third the mass for the same performance, but extrudes into the side torsos of a BattleMech and produces additional waste heat.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 10 (2 CT + 8 ST)
Install Location: Center Torso
Value: 12,300,000
Gear ID: emod_engineslots_cxxl_center


Equipped Effects:

  • -66% engine core weight.
  • -20 heat sinking per turn

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'Mech is incapacitated

Notes:

  • Clan XXL engines take up 2 critical slots in the CT and 4 in each side torso, making it quite vulnerable to side torso hits but as much as an IS XL engine
  • 3 critical hits on the engine will also incapacitate the 'Mech, providing full salvage in the same way a headshot would
  • Unlike a Clan XL engine, destroying a single side torso will incapacitate a 'Mech with a Clan XXL engine


Found On These 'Mechs: (Click Expand For List)


3rd Gen. Engine

The 3rd Generation Fusion Engine is the final expression of engine technology in the Inner Sphere. With all the weight savings of the Extra-Light Fusion Engine with zero drawbacks (it doesn't extend into the side torsos), the 3rd Gen. Engine is the absolute pinnacle of what an engine is capable of being. Developed by St. Ives in response to Capellan aggression, the 3rd Gen. Engine is as good as it gets. The 3rd Gen. Engine is Community Content gear.

Manufacturer: St. Ives
Tonnage: 0
Critical Slots: 3
Install Location: Center Torso
Value: 500,000
Gear ID: emod_engineslots_3g_center


Equipped Effects:

  • -50% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


3rd Gen. XXL Engine

The 3rd Generation XXL Fusion Engine is the final expression of engine technology in the Inner Sphere. With all the weight savings of the Extra-Extra-Light Fusion Engine with few drawbacks, the 3rd Gen. XXL Engine is the absolute pinnacle of what an engine is capable of being. Developed by St. Ives in response to Capellan aggression, the 3rd Gen. Engine is as good as it gets. The 3rd Gen. XXL Engine is Community Content gear.

Manufacturer: St. Ives
Tonnage: 0
Critical Slots: 7 (3 CT + 4 ST)
Install Location: Center Torso
Value: 500,000
Gear ID: emod_engineslots_3gxxl_center


Equipped Effects:

  • -66% engine core weight

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Unique Light Engine

The Unique Light Fusion Engine is mechanically similar to an XL Engine, but uses Lostech energy shielding to allow a mech to survive the destruction of a side torso. The Light Fusion engine is 75% the mass for the same performance, but intrudes into the side torso bays of a BattleMech. The Unique Light Engine also comes with attached engine speed enhancements that permit the equipped mech to move faster than normal for its engine size. The Unique Light Engine is Community Content gear.

Manufacturer: Generic
Tonnage: 0
Critical Slots: 8 (4 CT + 4 ST)
Install Location: Center Torso
Value: 937,500
Gear ID: emod_engineslots_light_center_unique


Equipped Effects:

  • -25% engine core weight
  • +25% Walk Speed
  • +0.25 Sprint Multiplier

Critical Effects:

  • HIT 1: Engine damaged, additional 15 heat per turn
  • HIT 2: Engine damaged, additional 30 heat per turn
  • DESTROYED: Engine destroyed, 'mech is incapacitated


Found On These 'Mechs: (Click Expand For List)


Engine Cores

Fusion engines are defined by their engine rating. In BTA3062, engine cores are used as replaceable equipment allowing the player to increase or decrease the overall size and power of an engine. The larger the engine core, the faster the 'Mech moves. Note that some 'Mechs are limited to a certain engine core range depending on their size. As an example, a 20t Locust cannot fit anything larger than a 195 core.

For 'Mechs, their maximum walking momentum is directly proportional to engine rating. For instance, a 30-ton Spider BattleMech with a 240 Pitban Fusion Engine is able to generate the same maximum momentum of a 60-ton Merlin with the same engine, but because the Merlin masses twice the Spider, the Spider's maximum velocity is twice that of the Merlin.

All fusion cores require a minimum of 10 heat sinks internally or externally in order for the 'Mech to operate, with extra heat sinks permitted in a 'Mech's potentially in the core itself if it is large enough (see E-Cooling for more information). The 250 core is the minimum sized core that can mount 10 heat sinks internally. Below this size bracket the core can't fit the minimum number of sinks and requires additional heat sinks to be added to the 'Mech (though these extra sinks don't cost any weight, until you go above 10). Cores scale in increments of 25 in regards to their restricted or expanded space available, e.g. a 200 rated engine requires 2 additional heat sinks to be fitted, a 225 engine requires only one, a 250 engine requires no additional heat sinks and a 275 rated engine has space for an additional heat sink that can be added using the E-Cooling +1 gear. The table below details which cores provide space for additional cooling (275 and above) and which require additional heat sinks and how many (245 and below).

Size Mass Engine Heat Sinks
050 2.5 -8
055 2.5 -8
060 2.5 -8
065 3 -8
070 3 -8
075 3 -7
080 3.5 -7
085 3.5 -7
090 4 -7
095 4 -7
100 4 -6
105 5.5 -6
110 5.5 -6
115 6 -6
120 6 -6
125 6 -5
130 6.5 -5
135 6.5 -5
140 7 -5
145 7 -5
150 7.5 -4
155 7.5 -4
160 8 -4
165 8 -4
170 8 -4
175 9 -3
180 9 -3
185 9.5 -3
190 9.5 -3
195 10 -3
200 10.5 -2
205 11.5 -2
210 12 -2
215 12.5 -2
220 13 -2
225 13 -1
230 13.5 -1
235 14 -1
240 14.5 -1
245 15 -1
250 15.5 0
255 16 0
260 16.5 0
265 17 0
270 17.5 0
275 18.5 +1
280 19 +1
285 19.5 +1
290 20.5 +1
295 21 +1
300 22 +2
305 23.5 +2
310 24.5 +2
315 25.5 +2
320 26.5 +2
325 27.5 +3
330 28.5 +3
335 29.5 +3
340 31 +3
345 32.5 +3
350 33.5 +4
355 35.5 +4
360 37 +4
365 38.5 +4
370 40.5 +4
375 42.5 +5
380 45 +5
385 47.5 +5
390 50 +5
395 53 +5
400 56.5 +6
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