2 3800kv Motors?

[sharkattack99]

Hello

I currently have the Castle creations SCT ESC (waterproof version) and the 3800kv motor on my Wroncho. Been thinking of running dual 3800kv motors, for for the fun of it, :lmao:, will the that ESC handle 2? or will i need to have 2 escs as well? and if only one is needed how do i wire it up? or if 2 are needed how do i wire that up to the receiver as well as to 1 battery?

Also with 2 motors sharing the load could i then run 3s lipos? Says only 2s lipos with that combo but was wondering with 2 could 3s lipos be put back on the table? thanks for any info.

 

[Jsabourin]

If your talking KV then your brushless and in the case you would have to run dual ESC and have them run together.

 

[EeePee]

If your talking KV then you're brushless

Brush motors can be rated by KV also.

Motor speeds (taken from random and averaged sample @ zero timing & 3100rpm):
10t = 6526 rpm/volt
15t = 4317 rpm/volt
17t = 3753 rpm/volt
20t = 3216 rpm/volt
21t = 3082 rpm/volt
23t = 2790 rpm/volt
25t = 2588 rpm/volt
35t = 1565 rpm/volt
45t = 1210 rpm/volt
55t = 987 rpm/volt
65t = 837 rpm/volt

And, two ESCs, run on one 2S battery.

 

[Jsabourin]

But assuming that he has an even KV number that would be brushless and the number that you posted for brushed are all random. But I thought people refer the brushed motors in turns rather the KV.

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[svt923]

Every dual brushless motor setup I have seen has used 2 ESCs. I don't know if it is possible to run 2 brushless motors on 1 ESC.

Both ESCs would get plugged into the receiver either with a Y-adapter on the throttle channel or in 2 separate channels and mixed together by the radio (the later option requires a higher end radio).

 

[sharkattack99]

Yes it's brushless sorry should have mentioned that.

yeah i wasn't sure either thanks.

so i would still have to run 2s. there both rated for 3s, but CC says do to weight limits like 6lbs i think 2s was the limit. was hoping with the split load 3s would be an option again....2s is fine though plenty fast for what i built my scx10 whroncho for.

and wiring the battery, just solder both the red together on the + spot of a deans and the both blacks on the - side?

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[EeePee]

But I thought people refer the brushed motors in turns rather the KV.

They do, but there's a corresponding KV number still. It's quite simple stuff really. Brushless can be, and is rated in turns also.

It's safe to say that if 5 brush motors are build using as identical parts as possible, the variation between numbers will be minimal. Not exactly random. JRH just took a random motor in whatever turn count and there's the KV numbers he found. To think every brushless motor built for 3800 KV is exactly at 3800 KV is a long shot.

 

[DickyT]

and wiring the battery, just solder both the red together on the + spot of a deans and the both blacks on the - side?

yes sir

 

[sharkattack99]

yes sir

Thanks, also I read think it was one here that one of the red wires on the esc needs to be pulled?

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[sharkattack99]

Do both the esc have to be the same? was thinking of getting the MM pro esc (same Motor) pulling the power wire of my SCT SWV3 esc and making all the setting the same for each but having the MMpro power my rx/servo cause the SW doesn't have the ability to change bec voltage. and what is the difference between the SCT version of the mamba max pro and just the regular MM Pro?

also does it matter if the shaft sizes are different?

may still go with the same set up but was just wondering.

 

[Davis_Krawling]

So why not go to a Tekin T8 2650KV on 4S on an esc that can handle it.

 

[Davis_Krawling]

Ok, now that I have gotten my sarcasm out of the way. The SCT esc is capable of running 3s, the castle 3800KV motor is not. even if you could run 2 brushless motors on 1 esc (I'm want to believe everyone else on this, but have not seen proof) the only possible wiring would be in parallel which means the full battery voltage is applied to both motors. I am also pretty sure that here is not enough current capacity leftover on the SCT esc to a second motor.

When you wire 2 brushed motors to one esc you have 2 options on wiring series or parallel. in series each motor only sees half the total voltage, so you could run to motors rated for 2S on 3s since each motor only sees 1.5S, and the esc sees the current of one motor. In parallel each motor sees the full voltage, but the esc sees 2 motors worth of current.

back to the real question here is what are you doing that requires 2 brushless motors? I see 2 outcomes here, you have a crawler ready to enter a 10th SCT race, or you are geared to where you could pull my full size out of the ditch.

 

[sharkattack99]

So why not go to a Tekin T8 2650KV on 4S on an esc that can handle it.

Cause i can get 2 of the CC Systems for the Price of 1 Tekin system and the CC is waterproof both motor and esc from factory.
planned on putting both battery wires onto 1 deans connector. although putting a connector on each esc and using a parallel adaptor seems like it would be easier.

Actually they are both rated for 3s says so right on the motor, just Castle doesnt recommend 3s in that combo cause of weight i guess like 6.5lbs i think i pretty sure im under that though. i was hoping i could run 3s with 2 motors instead of 1. and cause i like to overkill lol :lmao:. plan on running though the mud and i want to have the torque for it. Yeah im sure one motor probably has it but who knows maybe one day i get my full size truck stuck in the sand dunes here and need a tow, ;-):lmao:

 

[scxguy]

So why not go to a Tekin T8 2650KV on 4S on an esc that can handle it.

What this guy said. get the buggy version which is a little longer. also be ready to upgrade the rest of your rig!:mrgreen:

 

[sharkattack99]

i got it pretty upgraded so far, punisher shafts are on the way about the only thing still stock is the battery location and the frames and shock mounts.....haven't pulled the trigger yet emailed castle to see what they had to say Im pretty sure they will say still stick with 2s which is fine, im running 14/56 gearing it moves pretty quick, lol.

 

[sharkattack99]

I finally got a reply from castle and they say I can run 3s with this combo with 2 esc and motors sweet....my basher/mudder will have plenty of speed and torque have another set coming. Kind of my own project overkill.....lol

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[allanon1965]

"The SCT esc is capable of running 3s, the castle 3800KV motor is not."

Since when is the castle 3800 not able to run 3s? my castle 3800 says right on the motor 2s/3s.....now the sct esc that came with it says 2s only...

 

[sharkattack99]

Yeah i was flumixed by that too....lol says right on my motor too max of 3s...but that combo in a SCT have to use 2s weight issue I guess.

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