Brushless motor considerations for the II

[Chiphead]

Put my 2 cents in...

When I first built my II, I went with a Holmes 10t Crawlmaster 550 brushed; great motor, very fine low throttle control, strong and no problems moving the SCX10.

Last weekend, I pulled a 2200kv Puller Pro Stubby out of a Twin Hammers that my son no longer drives and give it a try in the II. I love it. Geared 14/56 running on 3s. Fantastic Motor! I didn't believe that brushless could be so good at low throttle.

 

[gigacrawl]

I see that Castle has announced sensored versions of their 4 Pole motors (1410-3800kv and 1415-2400kv models). They are not released yet so who knows how they would perform , but might be another option.

 

[MeanTT]

My castle motors are the best ones I have. I too am looking forward to sensored offerings. I run the 3800 in my twin hammers. It may be too much speed, but when I get my scx 10 ii up and running with a sensored leopard 3550 kv I will let ya know. I run a sensored 2900 leopard with a MMP in my scx 10 with 2.2s and I have amazing low speed control.


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[ajsmcs]

I have the HH 2200kv waterproof puller pro in my scx10.2 and I really like it. I do wish I had purchased the 2700kv. It was out of stock for a long time and I really needed a motor to get this rig up and going. If I have to I will gear up a little to get some more wheel speed. 3s is a must with the 2200kv. I truely feel that the 2700kv would be the best of all worlds with regards to the HH puller pro motors.

Have you tried the 2200KV on 4S? If not, that should give you the increased wheel speed you're looking for without needing to increase your gearing. "thumbsup"

 

[Motorider]

Have you tried the 2200KV on 4S? If not, that should give you the increased wheel speed you're looking for without needing to increase your gearing. "thumbsup"

The only issue with 4s is of course another battery, but it would require a bec. I currently run the shv500 servo that is powered directly off of the 3s battery.

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[ajsmcs]

The only issue with 4s is of course another battery, but it would require a bec. I currently run the shv500 servo that is powered directly off of the 3s battery.

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First off, that servo can handle up to 16V, so you would not only not need a BEC; you would also end up with a more powerful, faster servo.

Second, $50 for a new battery is a small price to pay to rid you of the buyer's remorse you've been having over that fancy $260.00 motor/esc combo.

If I were in your shoes and threw down that kind of money on premium kit, I'd want to make damn sure I was totally happy with it and able to use it to its full potential. (And being able to run at higher voltage is one of the big benefits to a low KV motor.)

But hey, that's just me...;-)

 

[Motorider]

I agree mostly, but a 4s pack is 16.8v when fully charged and John holmes said his servo would not handle it. I am very happy with my purchase. I have no buyers remorse. I can either gear up a bit or leave it be. Motor Temps are staying around 100 f. I have many needed upgrades before I worry about more wheel speed. I may one day goto a 4s setup, but for now I am in need of links, ends, wheels, tires, and weight down low. Those all trump a little more wheel speed.

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[ajsmcs]

I agree mostly, but a 4s pack is 16.8v when fully charged and John holmes said his servo would not handle it. I am very happy with my purchase. I have no buyers remorse. I can either gear up a bit or leave it be. Motor Temps are staying around 100 f. I have many needed upgrades before I worry about more wheel speed. I may one day goto a 4s setup, but for now I am in need of links, ends, wheels, tires, and weight down low. Those all trump a little more wheel speed.

If you're happy then I'm happy. Only trying to help. 8)

I'm actually looking into getting one of the 2700KV Puller Pros myself.

That's a bit strange about the servo, though. Why give the specs at 14V if it can't handle a 4S? :???:

 

[Motorider]

If you're happy then I'm happy. Only trying to help. 8)

I'm actually looking into getting one of the 2700KV Puller Pros myself.

That's a bit strange about the servo, though. Why give the specs at 14V if it can't handle a 4S? :???:

Does the castle bec goto 14v?

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[ajsmcs]

Does the castle bec goto 14v?

No, unfortunately. It goes up to 9V output. I looked online to see if I could find any that can handle higher than that, but came up short. :/
In fact, I'm not even sure if there are any Rx's that can handle that high of a voltage. I know that the SR410's that I use max out at 9.6V.

 

[Motorider]

No, unfortunately. It goes up to 9V output. I looked online to see if I could find any that can handle higher than that, but came up short. :/
In fact, I'm not even sure if there are any Rx's that can handle that high of a voltage. I know that the SR410's that I use max out at 9.6V.

That is the same as my sr3100 rx. I'm not sure about the 14v spec from holmes. I'm sure he did that for a reason.

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[ajsmcs]

You're in luck! Turns out Castle makes a higher end BEC called the "BEC Pro" that supports up to a 12.5V/20A output. $35.

 

[Motorider]

You're in luck! Turns out Castle makes a higher end BEC called the "BEC Pro" that supports up to a 12.5V/20A output. $35.

That's awesome. Lighting and servo off of the bec.

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[Say what?]

The only issue with 4s is of course another battery, but it would require a bec. I currently run the shv500 servo that is powered directly off of the 3s battery.

In Johns owen words:

holmes hobbies BLS SHV500 servo/Max 16 volts

https://www.youtube.com/watch?v=th6u0TxzYTg

~D

 

[Motorider]

In Johns owen words:

holmes hobbies BLS SHV500 servo/Max 16 volts

https://www.youtube.com/watch?v=th6u0TxzYTg

~D

Yes that is true, but a fully charged 4s pack is 16.8v. That is about 17% less mah than the rated mah of a given 4s pack. He even says that his pack is not fully charged on purpose due to the servo. I choose to run 3s due to that fact.[emoji41]

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[mobgma]

Can anyone make a recommendation on a waterproof brushless sensored ESC and motor combo? I intend to run 2S 7.4V 5000mah. I intend only to crawl and run a few trails. High speed is not needed. Just a good combo with good reliability and long run times.