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Fusion engines are the powerhouse of a BattleMech. They provide the power necessary to move and fire weapons. Unlike internal combustion engines, fusion engines generate power by fusing hydrogen isotopes (1H) much like the center of stars. Despite conventional thought, these engines are not potential mini-nuclear explosions. When damaged to a significant degree, these engines will automatically shut down all fusion reactions and power down the BattleMech.

Engines come in two types; Standard Engines and Extra-Light Engines.

  • Standard engines are mounted in the center torso and require six critical spaces. These engines cost less than XL Engines but weigh more. Additionally, 'Mechs mounting standard engines are more durable than those mounting XL Engines since the engine can survive the destruction of a side torso.
  • XL Engines are also mounted in the center torso but also extrude into each side torso due to their increased bulk. These engines weigh half as much as a standard engine of the same rating but cost much more. If the side torso of a 'Mech mounting an XL engine is destroyed, then 'Mech is disabled due to amount of damage the engine extruding into the side torso has taken.

Engine Weights Table

Engine Rating Standard Tons Standard Price XL Tons XL Price
100 1 613,133 0.5 1,632,833
105 2.5 643,800 1 1,714,500
110 2.5 647,467 1 1,796,167
115 3 705,133 1 1,877,833
120 3 735,800 1 1,959,500
125 4 766,500 2 2,041,250
130 4.5 797,167 2.5 2,122,917
135 4.5 827,833 2.5 2,204,583
140 5 858,500 2.5 2,286,250
145 5 889,167 2.5 2,365,917
150 6.5 919,867 4 2,449,667
155 6.5 950,533 4 2,531,333
160 7 981,200 4 2,613,000
165 7 1,011,867 4 2,694,667
170 7 1,042,533 4 2,776,333
175 9 1,073,233 5.5 2,858,083
180 9 1,103,900 5.5 2,939,750
185 9.5 1,134,567 6 3,021,417
190 9.5 1,165,233 6 3,103,083
195 10 1,195,900 6 3,184,750
200 11.5 1,226,600 7.5 3,266,500
205 12.5 1,257,267 8.5 3,348,167
210 13 1,287,933 8.5 3,429,833
215 13.5 1,318,600 9 3,511,500
220 14 1,349,267 9 3,593,167
225 15 1,379,967 10 3,674,917
230 15.5 1,410,633 10.5 3,756,583
235 16 1,441,300 10.5 3,838,250
240 16.5 1,471,967 11 3,919,917
245 17 1,502,633 11 4,001,583
250 18.5 1,533,333 12.5 4,083,333
255 19 1,564,000 12.5 4,165,000
260 19.5 1,594,667 13 4,246,667
265 20 1,625,333 13 4,328,333
270 20.5 1,656,000 13.5 4,410,000
275 21.5 1,686,667 14 4,491,667
280 22 1,717,333 14 4,573,333
285 22.5 1,748,000 14.5 4,655,000
290 23.5 1,778,667 15 4,736,667
295 24 1,809,333 15 4,818,333
300 25 1,840,000 15.5 4,900,000
305 26.5 1,870,667 17 4,981,667
310 27.5 1,907,333 17.5 5,063,333
315 28.5 1,932,000 18 5,145,000
320 29.5 1,962,667 18.5 5,226,667
325 30.5 1,993,333 19 5,308,333
330 31.5 2,024,000 19.5 5,390,000
335 32.5 2,054,667 20 5,471,667
340 34 2,085,333 20.5 5,553,333
345 35.5 2,116,000 21.5 5,635,000
350 36.5 2,146,667 22 5,716,667
355 38.5 2,177,333 23 5,798,333
360 40 2,208,000 23.5 5,880,000
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BattleMech Engine Ratings Table

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