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Does it really make much difference in single line cooling thru the rudder pick up...if you run the line thru the ESC or the Motor first?
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Yes, the esc will fail due to heat first. The motor only has bearings and solder connections to deal with heat. The circuits of the esc are more easily damaged. Allways go thru the esc first with the coolest water. Another option is to use two inlets and plumd each seperatly.
CG3 -
Thanks for your reply but...I understand what you're saying but..I'm asking will the temps be cooler run either way?Comment
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Think he meant that it is better to cool the ESC first, as the motor is less heat sensitive. A lot depending on your set up, and heat that is picked up from the motor can't warm the water up that much to reduce its ability to cool the ESC, IMO. If the motor is that hot, something is wrong with the set up already.
That having said, it is better to cool the ESC first if only to ensure the least restricted route for the water.Too many boats, not enough time...
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I think this depends a lot on your boat type and setup, plus how you drive. Too much mid rev range can really heat an esc. However, if your cooling is adequate and you watch your run times you *can* muck with your rev range quite a lot during a run without heat in the esc being an issue. If you've over propped say, and your waterlines are just that bit too thin, then yes, I'd say your ESC is going to be getting some pretty warm water through it if it's going through the motor first, and won't get cooled as well as it might otherwise. But a properly run, and a properly set up boat won't have these issues, and you could run your water through either the motor or ESC first. That said, most people cool the ESC first as it is more prone to heating in any boat. In theory, if you had a day where you had to alter speeds a fair amount, perhaps because of conditions say, then yes you'd do better by cooling the ESC first. In theory.PERTH AUSTRALIA
|| 2 x SV 27R || Impulse 31 - ver1 || Traxxas Spartan || Kintec Pursuit || Zonda Cat 41" || Insane FE30 || OuterLimits 870mm || TFL Ariane 36" || ProBoat Zelos 48 ||Comment
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Thanks for everyone's input! I don't have a problem for my esc is cooled first...it's just something I wanted to hear other people's thoughts on for I had heard it discussed before and was wondering!Comment
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Not so. The most commonly damaged part of a motor from heat are the magnets. Motor temperatures above 150-175 will permanently damage most magnets. This damage will contribute to many "mysterious" ESC failures yet is seldom considerded....The motor only has bearings and solder connections to deal with heat. The circuits of the esc are more easily damaged....
That said, a single water line should run to the ESC first. I've been racing for years with single water pickups routed this way with fine results. Note this is mostly racing (max 2-3 minutes) in water temps to 90F.
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Is it even possible for the few milliseconds the water is actually in the tube that it will warm it a considerable amount?
I run a single pickup on my rio ep brushless.
I run dual pick ups in my villain, one for esc and one for motors. I plan in running dual pickups in my genesis also.Comment
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Is it even possible for the few milliseconds the water is actually in the tube that it will warm it a considerable amount?...
If your concerned about that, Kintec has some nifty inline water coolers... http://kintecracing.com/Water_Cooling_BQFJ.html - they're right past all the water jacket products.
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I think what Cinnabun means is that because the water is moving through the whole system at quite a speed, will it get warmed up all that much in any case. In my experience, heck yes, if you're pushing the limits then it'll get warmed up no problem at all. Although it doesn't seem it, the motor jacket acts like a small reservoir, meaning the water is usually slowed a bit when it goes through there. Extra time to pick up heat. The water will definitely get warmed with a decent run and a system set up for sport running.PERTH AUSTRALIA
|| 2 x SV 27R || Impulse 31 - ver1 || Traxxas Spartan || Kintec Pursuit || Zonda Cat 41" || Insane FE30 || OuterLimits 870mm || TFL Ariane 36" || ProBoat Zelos 48 ||Comment
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I wonder why nobody uses them?...
Don't know, maybe people are not aware of there availablity?? Reason I don't use them is because I don't have a need to. My cooling line(s) go from the P/U to the ESC, ESC to motor, then out. Pretty much everybody on this forum says to do it that way, so that's the way I've been doing it.
My common sense tells me they slow the pressure/flow down...
How?? What's the diff between using those or a piece of aluminum / brass tubing for connecting two water lines together?? They're basically just a piece of metel tubing with fins on them to dissipate heat.
JMO
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Ever notice the inside of an electric boat is like an oven. 3 heating elements, batteries, motor, and esc all transfering heat to the cooler air in the cabin. No one uses in line coolers because they are a gimmick for electric boats, kinda like battery cooling plates.Comment
-- Seems like there's a lot of "gimmicky" stuff for R/C models, both land & marine.
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