RC-Monster Forums - MMM problems

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- - MMM problems (https://www.rc-monster.com/forum/showthread.php?t=24354)

Hi all,

I'm somewhat a newbie to RC so bear with me. I have been having a problem with my Momba Monster setup. I currently have a v3 MMM esc and an equvlient motor to the one that comes with the e-revo BE, I am running a 5s lipo 30c 4000mAH (Eagle Power). This is installed on a Cen Matrix TR FRE, brushless converted with the rc monster motor mount. I recently destroied my second motor (pics below) the first one i was running 11/66 or 62 cant remember whatever comes stock on a the truggy. The second time I was running 11/52 motor temps were good and esc fan would never come on, also i was running with the body off, so airflow was not a problem. I mostly us the truggy for bashing and was planning to start taking it to the track but am now getting very frustrated... any help would be very much appreciated.
thanks in advance.

-Justin

Couple vids of the car (Death of the monster is the first motor)

http://www.youtube.com/watch?v=IMc4ta49Wbw

Second motor in-car cam

http://www.youtube.com/watch?v=dBLmVCcFE8Y

EDIT: sorry dont know how to put video in post

Quote:

Originally Posted by 7mgtemkiii (Post 331225)

I currently have a v3 MMM esc and an equvlient motor to the one that comes with the e-revo BE

Guess that motor isn't equivalent. You blew the rotor. It didn't stand up to the RPM requirements.

Try a genuine motor next time. Castle/Neu or Neu.

Trying to save a few bucks can cost a lot in the long run....

I was gonna say, when you say 'eqivalent motor', did you mean just a normal black cc2200kv traxxas version, but then I realised that the castle made motors (for traxxas and hpi) dont have wrapped rotors...

HiMark? Nice looking ripoff at best- shame its in China as Castle cant persue copyright infringement. Worrying really as there is a knockoff MMpro/ MMM type esc doing the rounds too (link to a site selling them in Germany floating around here some place..).

Stick with known brands that, if not great (feigao), are atleast predictable and easy to get to work in a certain application (by gearing down & adding a heatsink/clamp etc)...

What motor would you suggest I buy for my application? I have no clue when it comes to this stuff, and what gearing would you suggest? Is the battery ok to use or should i go with a different one?
Thanks

- Justin

What motor is that? totally different from Castle's except the cooling fins. No kevlar wrapping, carbon instead. The magnet doesn't look like neodymium neither. Stator/windings/leads/screws also differ. Same size bearing though.

Quote:

Originally Posted by suicideneil (Post 331307)

but then I realised that the castle made motors (for traxxas and hpi) dont have wrapped rotors...
...

Are you sure about that? so how could those black motors handle the monster abuse in E-REVO BL and Savage Flux ?

Pat can answer than one- they might be wrapped with kevlar actually, but they definately arent wrapped with carbon.. of gaffer tape, whatever that black stuff is... :lol:

As for what motor to buy; an official castleneu 2200kv one ofcourse- same size as the copy, but much more powerful and better quality. As for not knowing what to use- thats what forums are for = seek and ye shall find (an answer), or ask and ye shall receive (helpful info). :wink:

Quote:

Originally Posted by suicideneil (Post 331307)

Sorry Neil,

The Castle made motors have Kevlar wrapped rotors.

Quote:

Originally Posted by suicideneil (Post 331428)

As for what motor to buy; an official castleneu 2200kv one ofcourse- same size as the copy, but much more powerful and better quality. As for not knowing what to use- thats what forums are for = seek and ye shall find (an answer), or ask and ye shall receive (helpful info). :wink:

:whistle:

And thats why everyone likes/hates me :smile:

Either a MMM 2200 Kv or 2650 Kv motor will work great in your application. I usutally point people towards the 2200 has a much wider power range as is more powerful than the 2650.

Our customers have explained why there is no MMM/Neu motor "equivalent" and trying to saving a few bucks at this power level can be very expensive.

Bernie

This is the combo set I purchased at the local hobby shop in Korea

http://translate.google.com/translat...3938%26hl%3Den

₩ 466 000 = 398.89600 US$

They quoted the CC website in their ad. The part about the ESC is fine but I think it was wrong of them to put the motor part in there since it doesn't come with the real CC motor. I think it would be easy for a less educated shopper to purchase that system, and, when it fails, assume that CC makes poor quality motors.

Indeed, the wording of the advert is very misleading, or confusing at best:

Quote:

OK, so you're asking, "What motor do I run it with, where's the Castle motor for this thing?"

They are on the way, honest! They are on the way, honest! The long wait is nearly over. The long wait is nearly over. You don't want to know how many prototype motors we've tortured in the testing of this Monster. You don't want to know how many prototype motors we've tortured in the testing of this Monster. The work has all paid off with these incredible motors. The work has all paid off with these incredible motors. Based on Steve Neu's awesome 15 series motor, the Neu-Castle 2200 and 2650 are works of mechanical art. Based on Steve Neu's awesome 15 series motor, the Neu-Castle 2200 and 2650 are works of mechanical art. They both feature high quality bearings and Neodymium magnets, superior electromagnetic design, and rigorous engineering control in our own factory result in a Monster motor we can put our name on. They both feature high quality bearings and Neodymium magnets, superior electromagnetic design, and rigorous engineering control in our own factory result in a Monster motor we can put our name on.

We're offering two choices: We're offering two choices:

Neu-Castle 2650 KV – Intended for 4S (16.8 Volt) operation. Neu-Castle 2650 KV - Intended for 4S (16.8 Volt) operation. Ideal for 1/8th conversions. Ideal for 1/8th conversions. The 2650 is 67mm long. The 2650 is 67mm long.

Neu-Castle 2200 KV – Intended for 6S (25.2 Volt) operation. Neu-Castle 2200 KV - Intended for 6S (25.2 Volt) operation. Incredible in monster trucks with up to 6S lipo packs. Incredible in monster trucks with up to 6S lipo packs. The 2200 is 75mm long. The 2200 is 75mm long. This is the bad boy! This is the bad boy!

Both motors come with a Neo rotor on a 5mm shaft as standard, not as an optional upgrade. Both motors come with a Neo rotor on a 5mm shaft as standard, not as an optional upgrade. Castle uses high end bearings for trouble free operation, and we've machined integrated cooling fins for that extra bit of power. Castle uses high end bearings for trouble free operation, and we've machined integrated cooling fins for that extra bit of power. These motors are 4 pole, slotted, brushless motors wound with 1 turn in a Y configuration. These motors are 4 pole, slotted, brushless motors wound with 1 turn in a Y configuration.

When? When?

ORDER NOW! Mamba Monster/2200kv combos should be delivered in early December. ORDER NOW! Mamba Monster/2200kv combos should be delivered in early December. Mamba Monster/2650 combos should be delivered in mid December. Mamba Monster/2650 combos should be delivered in mid December.

Hey, a motor is a motor, right? Hey, a motor is a motor, right? What's all the fuss? What's all the fuss? Who cares about a few points of efficiency? Who cares about a few points of efficiency?

Not all motors are created equal, efficiency matters a lot. Not all motors are created equal, efficiency matters a lot. Here's a little math, we promise it won't hurt. Here's a little math, we promise it won't hurt. Say you are laying down 1,000 watts, (about 1 ¼ horsepower), and your motor is 70% efficient. Say you are laying down 1,000 watts, (about 1 ¼ horsepower), and your motor is 70% efficient. That means you are turning 300 watts into heat. That means you are turning 300 watts into heat. Ever grab a 300 watt light bulb? Ever grab a 300 watt light bulb?

Monster's applications typically pull 4,000-5,000 watts (5 to 6 horsepower) under acceleration. Monster's applications typically pull 4,000-5,000 watts (5 to 6 horsepower) under acceleration. The Neu Castle motors are some of the highest efficiency motors that we've ever tested; they are up to 85% efficient on our rig. The Neu Castle motors are some of the highest efficiency motors that we've ever tested; they are up to 85% efficient on our rig. The more common Asian motors tend to show in the mid to high 70's. The more common Asian motors tend to show in the mid to high 70's. At those power levels, one single point equals about 50 watts of heat! At those power levels, one single point equals about 50 watts of heat! You know that soldering iron on your workbench? You know that soldering iron on your workbench? It's maxed out at 50 watts. It's maxed out at 50 watts. That's a lot of heat; now consider wasting several times that much heat inside your truck. That's a lot of heat; now consider wasting several times that much heat inside your truck. Monster motors can therefore put out more power for longer periods than less efficient motors. Monster motors can therefore put out more power for longer periods than less efficient motors. Go ahead, run the motor you have on the shelf, we have a feeling you'll find its limits pretty quickly. Go ahead, run the motor you have on the shelf, we have a feeling you'll find its limits pretty quickly.

It's always better to simply reduce the heat generated in a system by better engineering than to try and cool things with fans and other gimmicks. It's always better to simply reduce the heat generated in a system by better engineering than to try and cool things with fans and other gimmicks. Sure a fan can get you a few degrees, but you had better have a superior design to start with. Sure a fan can get you a few degrees, but you had better have a superior design to start with.

They say that the castle motors are "on the way", but then dont make it clear that the included ones arent actual castle motors... not cool.

And the price of $398 for a $170-200 esc and $60-80 is insane, thats just obscene.

On a side note- some awesome stuff coming out of korea for r/c lately, especially crawlers :yes:

So this isnt a CC MMM?This is a good copy?It says CC on the switch