Posted 13 January 2013 - 02:20 PM
I have a question about double heatsinks. Before you skip to the next question, I'm not going to ask if there are any plans to set all of them to 2 times the effectiveness of a single heatsink—I saw the response to that question in an earlier ask the devs thread. Instead, I'm going to ask if you guys ever considered leaving double heatsinks as they were in the initial implementation, in which double heatsinks built into the engine were the same as singles, and those mounted manually were 2 times as effective.
Before I explain why I think that's worth considering, I'd like to request clarification on an important point that no one on the forums seems sure about. After the patch came out that was supposed to set all double heatsinks to 1.4, some people claimed to have done testing and determined that engine heatsinks were actually at 2.0, while the rest were at 1.4. Is that the way it works currently? If so, that amplifies what I consider to be the big problem with double heatsinks tremendously.
Regardless, the basic nature of the problem is the same, as long as double heatsinks upgrade the engine heatsinks in some fashion. Garth's explanation for why double effectiveness for all double heatsinks was off the table was that the dev team didn't want double heatsinks to be mandatory for all mechs. From this, one can infer that double heatsinks are not meant to be a straightforward improvement over single heatsinks (an upgrade), but rather a different option with its own trade-offs, which make it better in some cases, and worse in others (sidegrade). The trouble is, improved engine heatsinks make double heatsinks behave like an upgrade, because they provide a benefit with no associated cost. Suppose engine double heatsinks are 1.x times as effective as singles. Then, before you even get into the trade-offs associated with mounting external doubles vs. singles (preserving tons vs. preserving crits), anyone choosing to use single heatsinks is penalized by x tons and x crits, since he or she has to mount x single heatsinks just to match what the double heatsink user gets for free in the engine.
This does two things. First, it decreases the number of configurations that are better off with single heatsinks. Second, if you have a configuration that is better off with single heatsinks, there's a good chance that it's not a competitive configuration in general, since it suffers from the penalty described above.
So, the bigger the upgrade that double heatsinks provide to the engine heatsinks, the less viable it is to use singles. With non-engine double heatsinks set to 1.4, this becomes much more of a problem than it would be if they were all set to 2.0. At 1.4, external double heatsinks provide little benefit relative to the amount of space they take up. Combine the poor scaling of heat efficiency as you add double heatsinks with the free boost provided by the upgraded engine heatsinks, and you get a heat efficiency sweet spot. If your loadout produces enough heat to take advantage of the upgraded engine heatsinks, but not so much that you need lots of heatsinks outside of the engine, double heatsinks will work very well for you. On the other hand, if your heat demands are much higher than what the engine heatsinks alone can meet, you'll have a very hard time fitting on enough doubles to meet them, and may simply run out of critical space before you succeed. Using double heatsinks, I can build an efficient HBK-4P with 7 medium lasers, or an efficient 4H with 4 medium lasers...and a Gauss rifle. (The space taken up by double heatsinks on the 4P precludes the use of ES or an XL engine).
One might think that this works out, since it makes double heatsinks most suitable for certain types of loadouts, while the rest can use singles. The problem here goes back to the penalty I described earlier—since double heatsinks give you something for free, loadouts that can use them effectively will have an advantage over those that cannot. So, by making high-heat configurations poor candidates for double heatsinks, 1.4 externals make those configurations uncompetitive in general. A prime example of a mech that suffers from this phenomenon is the poor AWS-8Q. Compare it to a Cataphract. If you use doubles, and try to add enough energy weapons to take advantage of the Awesome's extra tonnage, you'll run out of space before you can cool them. On the other hand, if you use singles, that pretty much kills the tonnage advantage you have over the Cataphract, if it's using doubles.
So, why not take away the free upgrade to the engine heatsinks, and make double heatsinks outside of the engine 2 times as effective as singles? That way, choosing doubles over singles would simply trade crits for tons, making them a useful option in some cases, but not an upgrade. Thanks for reading, if you got this far.