Yeah ... motor sits at around 48C under there doing nothing.
RX8 Renesis Rotary eSC
- Thread starter brettus8
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r.brown.bayliss
Member
yea, maybe but it will probably have to be a custom one. What motor are you using? I looked for some a while back, but they are all for smaller motors, 40-ish mm diameters. Then I saw this, and I had one of those silly ideas, buy some copper tube and make a custom jacket.
But it would need some heat transfer goop between it and the motor case. Something that wont drip out. I did think of using computer CPU thermal paste, but I think the vibrations will work that stuff out. Maybe so epoxy that transfers rather than insulates would stick it on good.
Haven't put mine in service yet but I'm using dual 2535 Castle motors so I doubt it will be an issue. With that coil rapped around the motor and some how prevented from vibrating and then it being rapped with a small insulation barrier on the outside provided you can get some ambient to cold water flowing through it continuously I believe it would help to reasonable degree at a minimum as a barrier to surrounding heat.
r.brown.bayliss
Member
I have these, I was looking at a way to wrap with a LED light fitting heatsink. But I think all those spiral square cut valleys might be a problem.
Then I thought of getting some 75mm stainless exhaust pipe, chuck in a couple of o-rings and some hose fittings. Low pressure water, a reservoir of some sort, and a small trans-cooler and a 12v pump, maybe a fan on the cooler if required
Then I thought of getting some 75mm stainless exhaust pipe, chuck in a couple of o-rings and some hose fittings. Low pressure water, a reservoir of some sort, and a small trans-cooler and a 12v pump, maybe a fan on the cooler if required
Now you're talking because that's the kind of ingenuity I was thinking of. You could put the trans cooler in front of the ac condenser and at speed I doubt you'd need a reservoir given the size of the motor relative to the heat exchange rate not to mention the coolant volume tied up in the system. Water has a very high specific heat so a simple circuit should do the job efficiently. Check ebay for some aluminum pipe close to the diameter you need, that would be better to work with than the stainless tubing in my opinion.
r.brown.bayliss
Member
Yes, I was thinking the case was steel, but it is aluminum so yea, ali tube. Galvanic Corrosion would be an issue with stainless and ali.
You should still have a reservoir though, the water volume will change with he heat, something like a small steering fluid reservoir would do. Join to the main cooling tube, have the pump taking the water from it, the cooler feeding back into it. Half fill it, place it higher than all the rest of the system, it will give some where for air bubbles to accumulate, and allow for expansion.
Or something like these for computer cooling systems. $50 on aliexpres, built in 12v water pump, and maybe usable brackets. The res doesn't need to be large, if you can keep the water below 60c it should be ok.
I dismissed the reservoir because a good bit of coolant would be tied up in the plumbing and I've used water to air intercooling before which is very effective at bringing temps down quickly and in this case the relatively small motor is being cooled as opposed to a very large and much hotter quantity of air.