Yes, there are. In fact a motor that runs cooler than another similar sized motor will also be more powerful as putting the same power in and losing less as heat means that more is being transferred to motion. Ever wonder why a NEU motor a similar size to a CMS motor is around $150 more expensive? It's because it has *miracle cures* for heat that enable it to pump more power for the size and stay cooler for the duration of it.

Heat is caused by inefficiency, and is avoidable. A NEU motor can be around 93% peak efficient depending on model/wind/KV, meaning that only 7% of the energy being used to spin the motor is being transferred to heat/sound. I would be surprised if CMS motors are anything over 70% efficient, and really well made low turn brushed motors can make around 50% efficiency. The CMS motors are crap in terms of motors as they are basic 380 's' rotored, 2 pole architecture motors that are made in China. No amount of marketing can get round the fact they just aren't very good.

Heat can be managed lots of ways, heatsinked cans, going to a multi-pole architecture, lengthening the armature, lowering KV and increasing voltage, improving materials, using different winds (delta etc.) Basic understanding of motor building would make you think about most of the things you have said in the last few posts.

These aren't nitro motors, they don't have an optimum operating temperature they need to be at in order to produce full performance and a system running hot (say over 100 degrees) is a system that is under engineered for the application to which it is being applied. Indeed, a system running hot is a system that will suffer an earlier failure than a cool running system. Granted, most of the issues in racing are caused by a set of rules governing professional racing that state that low voltage, high KV systems must be used, which is pretty much stoneage considering we are moving toward the holy grail of true high voltage. ROAR is pretty much solely responsible for holding back brushless development in RC, showing a blatant disregard for the technology involved means that companies like Novak are pretty much set on producing brushless products that will obey rules, but are actually not suited to what they are doing.

It is also why the motor in my Blitz runs hot despite the fact it is only pushing around a 3lb plastic toy whereas the NEU motor in my 17.6" wheelbase Savage weighing in at 15lbs on 6s providing nearly 5 peak horsepower remains ice cold during a run. I don't skimp on brushless, I just know what works, and Hobbywing is it for small scale stuff. The fact it happens to be cheap is just a bonus.