ANOTHER Flux MMM goes up in flames!? - RC-Monster Forums

03:00 AM

What say you Castle? This is starting to REALLY worry me.

http://www.savage-central.com/module...81425&start=40

MetalMan · 05.19.2009, 03:19 AM

I don't understand the need to worry

There are so many MMM V3 speed controls out there that are fully functioning. My guess is he will be taken care of.

shaunjohnson · 05.19.2009, 04:09 AM

they are a great ESC...trouble is....newbies to the MMM world dont treat them like some others do.
they use NIMH batts and do high load monuvers

if only the info some of the veterans on here know was out there for the noobs to acces

PDM · 05.19.2009, 04:36 AM

I do not understand why people post this messages as they are a shame for Castle. In fact most of the times they are really just a shame for those users of Castle products.

When I started in this hobby, 35 years ago, playing with model airplanes, there was a rule, always learn from people with more experience.

Nowadays people look at videos in the internet, buy the equipments, use them as they think they should be used, instead of the way they must be used, and things happen.

There are already a lot of stories of "crazy" gear ratios. Of course it is easier to burn a ESC with 6 cells connected if the ratios are not what they should be.

Always look for an advise from a more experienced modeller. These things are not toys.

shaunjohnson · 05.19.2009, 06:22 AM

^^^ exactly!!
idealy...castle might have madea bomb proof ESC (less powerful that MMM maby) and sold that to traxxas and HPI...meh...who am i in the sceme of things :P
CASTLE FTW!!!!!

Arct1k · 05.19.2009, 06:25 AM

Come on 6s, 40 series big joes, geared for the moon and no airflow - Bugger all wholes in body and a sock over the esc!

JThiessen · 05.19.2009, 08:59 AM

...and what was up with that filter sock? Probably the root cause of his issue.

TexasSP · 09:55 AM

Nice sock to impede airflow, extremely heavy tires and wheels (I hate aluminum wheels BTW, what's the point?!), and an idiot who can't even type without cussing five times per sentence.

Looks to me stupidity is the recipe for disaster. Like the one poster said, all that money you could have gotten a data logger, or at least a temp gun. I also see he ran it for 40 minutes probably geared for 60 and going off road through tall grass.

I have beat the snot out of my V2 MMM on 6s and it always comes back for more. Then you have DickyT with 400 logged hours of hard use on his before it gave up the ghost. Not to mention all the other great success stories.

Edit: I also looked at the guys other posts where he tore the truck completely down and reassembled it. He could easily have missed something and has binding in the drive train as well.

e-mike · 05.19.2009, 12:42 PM

this is the most useless thread that ive read....15lbs truck+no body air flow and kind of filter on the esc= this kind of failure....there should be have a CAUTION manual book in each box of flux or erby and newbe should read this manul before use the truck....

im not better than other guy's..o no

...but i never melt a mmm like it in this way...

or simply make a software to prevent that...!!??

01:02 PM

Well I plan on running Big Joe's 40 series as well, but I'm not sure if even going to attempt 6S power now and I've always kept my gearing 44/20 and i've leaned the power on the CC link and im running 28C SMC LiPos. Will I be ok?

Oh, and that "sock" is a special designed filter that MANY people uses without issues on their Baja's, so I fail to see how that could be even considered a possible cause of the fire

http://outerwears.com/categories.asp?cat=11441

And Jesus, dont' shoot the messenger. I'm a first time customer to CC, noobie to the brushless AND LiPo world who also spent ALOT of money on his Flux that he wants to protect. So i'm CONCERNED CUSTOMER and wanna prevent a tragedy like this so i'm asking the head hancho's themselves on who/what is at fault here so I don't become another failed/expensive noob RC statistic

Unsullied_Spy · 05.19.2009, 01:17 PM

Quote:

Originally Posted by Freezebyte

Well I plan on running Big Joe's 40 series as well, but I'm not sure if even going to attempt 6S power now and I've always kept my gearing 44/20 and i've leaned the power on the CC link and im running 28C SMC LiPos. Will I be ok?

Oh, and that "sock" is a special designed filter that MANY people uses without issues on their Baja's, so I fail to see how that could be even considered a possible cause of the fire

http://outerwears.com/categories.asp?cat=11441

And Jesus, dont' shoot the messenger. I'm a first time customer to CC, noobie to the brushless AND LiPo world who also spent ALOT of money on his Flux that he wants to protect. So i'm CONCERNED CUSTOMER and wanna prevent a tragedy like this so i'm asking the head hancho's themselves on who/what is at fault here so I don't become another failed/expensive noob RC statistic

6s lipo on the Savage really isn't for bashing if you ask me. 4s to 5s is best. If you gear down to compensate for the added weight and rotating mass it'll be fine. I run a MMM with an 80mm MedUsa in a ~16 pound Muggy and it's fine because I gear to compensate for the massive tires and the weight of the thing.

Outerwears on the Baja and the MMM are different. The Baja's flywheel is able to pull air through the filter very easily, the tiny fan on the MMM would have a harder time plus the filter will hold heat in.

So far it seems to me that you've been running yours within the safe limits of the power system and it has been fine. Running 6s with even stock gearing with wheels/tires that weigh 1+ pounds each is what will kill your ESC, Motor, and batteries.

05.19.2009, 01:18 PM

Quote:

Originally Posted by Unsullied_Spy

6s lipo on the Savage really isn't for bashing if you ask me. 4s to 5s is best. If you gear down to compensate for the added weight and rotating mass it'll be fine. I run a MMM with an 80mm MedUsa in a ~16 pound Muggy and it's fine because I gear to compensate for the massive tires and the weight of the thing.

Outerwears on the Baja and the MMM are different. The Baja's flywheel is able to pull air through the filter very easily, the tiny fan on the MMM would have a harder time plus the filter will hold heat in.

So far it seems to me that you've been running yours within the safe limits of the power system and it has been fine. Running 6s with even stock gearing with wheels/tires that weigh 1+ pounds each is what will kill your ESC, Motor, and batteries.

So when I go to 40 series and maybe 6S, should I drop to 18 pinion?

e-mike · 05.19.2009, 01:20 PM

try 18 tooth lowest timing,punch at 60% more airflow and check the temps

Unsullied_Spy · 05.19.2009, 04:51 PM

Quote:

Originally Posted by Freezebyte

So when I go to 40 series and maybe 6S, should I drop to 18 pinion?

What's stock pinion, 20T? I'd use BrianG's calculator and set a target speed of 35-40 MPH and measure your temps often. If your temps look OK then you can bump the pinion up a little.

05.19.2009, 05:04 PM

Quote:

Originally Posted by Unsullied_Spy

What's stock pinion, 20T? I'd use BrianG's calculator and set a target speed of 35-40 MPH and measure your temps often. If your temps look OK then you can bump the pinion up a little.

Yah, its 44/20T. What calculator?