cooling question ?

[supafastsupra2]

Why would you run from a hotter component to a cooler one? This will heat up the cooler component. ESC first, Motor second, period. Also your theory about how heat flows in electrical components is wrong. Heat is waste energy that occurs where there is resistance. The Motor has the highest resistance followed by the speed controller's MOSFETs and then the batteries internal resistance.

[Blackjack-sven]

Why would you run from a hotter component to a cooler one? This will heat up the cooler component. ESC first, Motor second, period. Also your theory about how heat flows in electrical components is wrong. Heat is waste energy that occurs where there is resistance. The Motor has the highest resistance followed by the speed controller's MOSFETs and then the batteries internal resistance.

So your telling me that the internal resistance of the battery won't be the first to warm up??

If you turn on the hot water tap, does the hot water in the lines not heat up right at the tank first??

Electricity moves EXACTLY the same way as water.

[Brushless55]

Why would you run from a hotter component to a cooler one? This will heat up the cooler component. ESC first, Motor second, period. Also your theory about how heat flows in electrical components is wrong. Heat is waste energy that occurs where there is resistance. The Motor has the highest resistance followed by the speed controller's MOSFETs and then the batteries internal resistance.

So one should run cooling to esc then motor always?
That's what I was thinking

I want to run a second cooling line on my Mean Machine, not sure the best way on a Cat?

[Blackjack-sven]

I'm doing the same on my cat that I'm doing on my Vortex. I'm running 1 line in and splitting it three times to go to my motor mount, esc, and cooling jacket and the exiting via 2 exits. Here's a pic of my boat now. In all honesty I would run three pickups and three exits to my stuff so that it all gets cooled with the same temperature and volume of water. This would slow the boat down a bit as there is more stuff in the water but it also means you'd be capable of running more powerful props, batteries or motors. The amount of cooling may not be enough to prop up or get a faster motor. but if all your looking for is a fast fun boat where everything stays cool, by all means run as many inlets as you have components to cool. I'm designing a cooling plate for my batteries so that I can pull more amps faster.

[sundog]

Blackjack, I'm pretty sure splitting it 3 ways would reduce its effectiveness - reducing flow to one third and not cooling anything well. You should keep it simple. Esc to mount to motor and out. The esc will heat the water the least, followed by the mount, then by the water jacket. My 2 cents for free. Sdg

[Rumdog]

esc first always. Most expensive, most fragile. doesn't matter whats hot first. do we water cool batteries?....NO. In fact Many believe it is good to preheat lipos, including myself. One pickup in most cases will work perfectly fine. If you are pushing your equipment that close to the limits, you need to change your setup, not your cooling.

[Rumdog]

In fact, more splits means slower flow. Which means more time for that water to pass thru the components allowing it to heat more. One line with high pressure flow, flowing quickly supplies cooler water because it is not slowly trickling across hot components and heating up.

[tharmer]

So I sent the water first to the component that is running the warmest, then to the one that is next warmest, etc. This gives most cooling to hottest component. Of course for me no component is dangerously hot so it is sorta moot.
-t

[ozzie-crawl]

. if your getting heating problems then there is some thing not rite. on some of my boats that pull less than 100 amps i use a 200 amp esc un water cooled, just the cheap himodel ones. have pulled 160 amps out of these with out water cooling no problems

[SLOW]

Im kinda new to the forum here but i'll add my 2 cents.

I have 2 water pickups on my SV-27, i run one to the motor and the other to the ESC.
then both converge in a Y fitting and flow out one exit.

It seems to work well, if anyone sees anything wrong with this i would like to know but it has worked quite well.

[Diegoboy]

Slow,
If you have dedicated cooling for each device, why skimp at the end? Run 2 exits.
Using one exit, If you loose cooling to the ESC via a blockage or a kink, for example, you'll still show exit flow from the motor pickup, and not know there's an issue.

[ozzie-crawl]

yes i would run 2 exits just in case your getting more flow threw one inlet but if you dont have heating issues then i wouldnt worry

[Brushless55]

Im kinda new to the forum here but i'll add my 2 cents.

I have 2 water pickups on my SV-27, i run one to the motor and the other to the ESC.
then both converge in a Y fitting and flow out one exit.

It seems to work well, if anyone sees anything wrong with this i would like to know but it has worked quite well.

That's what I want to do on my Mean Machine...
When my MM goes by I can see water comming out of the exit but not like how I had it comming out of my SV27 with an external pickup, not using the rudder pickup..

I am not sure where a good place to put a different pickup on my MM ?

[Blackjack-sven]

esc first always. Most expensive, most fragile. doesn't matter whats hot first. do we water cool batteries?....NO. In fact Many believe it is good to preheat lipos, including myself. One pickup in most cases will work perfectly fine. If you are pushing your equipment that close to the limits, you need to change your setup, not your cooling.

OFF TOPIC

Why on earth would you want to warm up your batteries before running them and getting them hotter. Does this not cause more problems?

[Brushless55]

OFF TOPIC

Why on earth would you want to warm up your batteries before running them and getting them hotter. Does this not cause more problems?

Some say you can get more punch out of the packs!