Thermal Issues with the New Traxxas Spartan

[forescott]

I'd try propping down to a 40mm prop and get a larger xl-sized cooling can that covers the entire length of that motor.

[GeoVW72]

Poping the esc apart is not difficult, there's just a few tabs and then the heat sink is accessible and still able to be installed in the boat as far as I can tell.


As far as the thermal resistor, I don't think there could be much done without knowing more about when the receiver decides to cut off, temp wise. I suppose knowing the stock cut off temp and the resistance of the stock resistor at temp, a resistor could be added to "fix" it. I was citing it more as a manufacturing tolerance that could have been overlooked, a replacement would be better.

The purpose of a water jacket is to get water in contact with the motor. A jacket will allow water to contact more of the surface area of the motor than tubing. Perhaps the problem with the stock jacket is that it forces water to travel around the motor rather than allowing free-flow like a standard jacket.

I also noticed that the motor I have has no end play. perhaps that is causing a bind?

You probably want the batteries to be at the back of the tray to get the bow out of the water, as in the top pic.
What Doug is talking about is the weight or trim tabs pushing the bow down with more hull in the water=more drag, bottom pic.

[Brushless55]

I'd try propping down to a 40mm prop and get a larger xl-sized cooling can that covers the entire length of that motor.

I wonder how much bite a prop that size would have on this size hull?

[stringfly]

Drive cable grease ????

After reading all this I am wondering what kind of lube or grease is being used on the drive cable. The manual says " Lubricate the motor bearings with the light oil included with the model" Then says next paragraph "remove the drive cable and lubricate it with the light oil included with your model. Any light oil included for motor bearings would not be worth a darn for the drive cable. On 6s lipos the motor is turning some rpms and the flex needs a decent marine grease so it won't pull a bunch of amps and overheat the motor or ESC. What is the oil included ????? Traxxas should know better and newbs don't know. This is no sealed truck transmission driving wheels with bearings with little drag resistance on a hard surface. My two cents.

Stringfly <>++++

[Steven Vaccaro]

In running the numbers, it seems in order to hit 30 with nimh, its got to be the motor kv you guys assumed at 1600kv or so, if thats the case, 6s is really to much. 5s would be better.

[Brushless55]

In running the numbers, it seems in order to hit 30 with nimh, its got to be the motor kv you guys assumed at 1600kv or so, if thats the case, 6s is really to much. 5s would be better.

with maybe a prop change on 5s, this boat may work very well

[Brushless55]

After reading all this I am wondering what kind of lube or grease is being used on the drive cable. The manual says " Lubricate the motor bearings with the light oil included with the model" Then says next paragraph "remove the drive cable and lubricate it with the light oil included with your model. Any light oil included for motor bearings would not be worth a darn for the drive cable. On 6s lipos the motor is turning some rpms and the flex needs a decent marine grease so it won't pull a bunch of amps and overheat the motor or ESC. What is the oil included ????? Traxxas should know better and newbs don't know. This is no sealed truck transmission driving wheels with bearings with little drag resistance on a hard surface. My two cents.

Stringfly <>++++

right here buddy!
http://www.offshoreelectrics.com/pro...od=dh-aqub9500

[Steven Vaccaro]

with maybe a prop change on 5s, this boat may work very well

On 5s you may be able to use the stock prop or a metal one of similar size. But its going to take some testing.

[Checkmateguy01]

In running the numbers, it seems in order to hit 30 with nimh, its got to be the motor kv you guys assumed at 1600kv or so, if thats the case, 6s is really to much. 5s would be better.

The Traxxas spec page say's the motor is 1600kv. I'm probably never gonna run the boat on 6s personaly, but if get a new charger and some lipo packs i'd like to run 4s and 5s in it, sounds like that is gonna work like a charm!

[Brushless55]

I just cannot decide if I am going to cancel my order or not

[Darin Jordan]

The Traxxas spec page say's the motor is 1600kv. I'm probably never gonna run the boat on 6s personaly, but if get a new charger and some lipo packs i'd like to run 4s and 5s in it, sounds like that is gonna work like a charm!

Does the spec page say how many poles this motor is??

[martin]

Looks like the Spartan is going to be a 40mph boat if 5s is the safest to use, $400 + lipos is a very expensive boat for 40mph. Thanks Martin.

[djmaincheese]

4S on this boat is as bad as the stock packs. It's perfect if you don't want to go faster than 30mph and want 10 minutes or so run time.

[Brushless55]

Does the spec page say how many poles this motor is??

Darin, I don't think Traxxas knows, but my guess is 2 pole
I think is similar to other XVL motor

[djmaincheese]

This is what the Inside of the motor looks like. Im sure this guy knows how poles this motor is, lol



So is the consensus to switch to a lower kv motor (leopard 1300kv) if we only want to run 6S?