This guide presents a comprehensive engine weight chart for both Standard Fusion and XL Fusion engines, along with practical information on how to use this data for Mech construction.
BattleTech Engine Weight Chart
| Rating | Standard Fusion (tons) | XL Fusion (tons) |
|---|---|---|
| 100 | 3.0 | 1.5 |
| 105 | 3.5 | 2.0 |
| 110 | 3.5 | 2.0 |
| 115 | 4.0 | 2.0 |
| 120 | 4.0 | 2.0 |
| 125 | 4.0 | 2.0 |
| 130 | 4.5 | 2.5 |
| 135 | 4.5 | 2.5 |
| 140 | 5.0 | 2.5 |
| 145 | 5.0 | 2.5 |
| 150 | 5.5 | 3.0 |
| 155 | 5.5 | 3.0 |
| 160 | 6.0 | 3.0 |
| 165 | 6.0 | 3.0 |
| 170 | 6.5 | 3.0 |
| 175 | 7.0 | 3.5 |
| 180 | 7.0 | 3.5 |
| 185 | 7.5 | 4.0 |
| 190 | 7.5 | 4.0 |
| 195 | 8.0 | 4.0 |
| 200 | 8.5 | 4.5 |
| 205 | 8.5 | 4.5 |
| 210 | 9.0 | 4.5 |
| 215 | 9.5 | 5.0 |
| 220 | 10.0 | 5.0 |
| 225 | 10.0 | 5.0 |
| 230 | 10.5 | 5.5 |
| 235 | 11.0 | 5.5 |
| 240 | 11.5 | 6.0 |
| 245 | 12.0 | 6.0 |
| 250 | 12.5 | 6.5 |
| 255 | 13.0 | 6.5 |
| 260 | 13.5 | 7.0 |
| 265 | 14.0 | 7.0 |
| 270 | 14.5 | 7.5 |
| 275 | 15.5 | 8.0 |
| 280 | 16.0 | 8.5 |
| 285 | 16.5 | 9.0 |
| 290 | 17.5 | 9.5 |
| 295 | 18.0 | 10.0 |
| 300 | 25.0 | 15.5 |
| 305 | 26.5 | 17.0 |
| 310 | 27.5 | 17.5 |
| 315 | 28.5 | 18.0 |
| 320 | 29.5 | 18.5 |
| 325 | 30.5 | 19.0 |
| 330 | 31.5 | 19.5 |
| 335 | 32.5 | 20.0 |
| 340 | 34.0 | 20.5 |
| 345 | 35.5 | 21.5 |
| 350 | 36.5 | 22.0 |
| 355 | 38.5 | 23.0 |
| 360 | 40.0 | 23.5 |
| 365 | 41.5 | 24.5 |
| 370 | 43.5 | 25.5 |
| 375 | 45.5 | 27.5 |
| 380 | 48.0 | 27.5 |
| 385 | 50.5 | 29.0 |
| 390 | 53.0 | 30.0 |
| 395 | 56.0 | 31.5 |
| 400 | 59.5 | 33.5 |
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Understanding Engine Ratings
Every BattleMech has an Engine Rating, which is calculated by multiplying the Mech’s tonnage by its desired walking speed. For example, a 55-ton Mech moving at 5 M.P. (movement points) requires an engine rating of 275 (55 × 5 = 275).
Engine ratings correspond directly to engine weights. Standard Fusion engines are heavier but occupy fewer critical slots, while XL Fusion engines are significantly lighter, allowing for more armor or weapons but using more critical slots. Selecting the right engine type is a trade-off between mobility, weight, heat management, and internal space.
Standard vs. XL Fusion Engines
Standard Fusion Engines: These engines are reliable, moderately heavy, and include ten built-in heat sinks. They are ideal for Mechs where critical slot usage is limited. Standard Fusion engines are often preferred for medium and heavy Mechs.
XL Fusion Engines: XL engines are approximately half the weight of Standard engines for the same rating. This allows designers to allocate weight for armor or weapon systems, improving overall Mech performance.
However, XL engines take up more critical slots and are less forgiving when damaged. They are commonly used in fast, high-mobility designs or Mechs that require heavy weapon loads.
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Tips for Mech Builders
- Balance Speed and Armor: Heavier engines reduce available weight for armor and weapons. Lighter XL engines increase speed and allow heavier armaments, but reduce critical space for other systems.
- Consider Heat Management: Standard engines include ten built-in heat sinks. XL engines also include ten, but additional heat sinks must be added separately if your weapon load produces extra heat.
- Check Critical Slots: XL engines take up more internal slots. Plan carefully to avoid limiting your weapon or system placement.
- Use the Table for Planning: Multiply your Mech’s tonnage by the desired walking MP to find the engine rating. Then select the corresponding engine weight from the chart.
FAQs
How much does a BattleTech 300 engine weigh?
A BattleTech engine with a rating of 300 weighs approximately 25 tons for a Standard Fusion engine and 15.5 tons for an XL Fusion engine. The Standard engine is heavier but uses fewer critical slots, while the XL engine is lighter, allowing more weight for weapons and armor.
What are the weight classifications in BattleTech?
In BattleTech, Mechs are classified by tonnage:
- Light Mechs: 20–35 tons
- Medium Mechs: 40–55 tons
- Heavy Mechs: 60–75 tons
- Assault Mechs: 80–100 tons
Engine weight scales with these classifications, as higher tonnage Mechs require higher engine ratings to achieve acceptable speed.
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How much does an engine weigh in kg?
Engine weights in BattleTech are listed in tons, where 1 ton = 1,000 kg. For example:
- A 300 Standard Fusion engine weighs 25 tons, which equals 25,000 kg.
- A 300 XL Fusion engine weighs 15.5 tons, which equals 15,500 kg.
What is the most common engine in BattleTech?
The Standard Fusion engine rated 200–275 is the most commonly used in BattleTech designs. It offers a balance of weight, speed, and critical slot usage, making it suitable for most medium and heavy Mechs. XL engines are common in specialized, fast, or highly armed Mechs.
How much does a KTM 300 engine weigh?
If referring to KTM motorcycles, the KTM 300 engine is significantly lighter than BattleTech Mechs. The KTM 300 two-stroke single-cylinder engine weighs approximately 11–12 kg depending on the model year. This is purely a real-world engine reference and unrelated to BattleTech engine ratings.
How heavy is a 235 engine?
A BattleTech engine with a rating of 235 weighs:
- 11.0 tons for a Standard Fusion engine
- 5.5 tons for an XL Fusion engine
This makes it suitable for medium Mechs with moderate speed requirements or lighter heavy Mechs needing weight for armor and weapons.
Final words
The engine is the heart of a BattleMech. Choosing the right engine type and rating affects every aspect of a Mech’s performance, from speed to survivability. This comprehensive engine weight chart allows Mech designers and players to make informed decisions, balancing weight, armor, weapons, and mobility effectively.
