I killed it... MMMv3 bit the dust

[Dagger Thrasher]

Ouch, that sucks. Those temps are way too hot, though! The MMM doesn't thermal until it hits around 220F, but judging by the temps of those cells, I'm thinking that maybe ripple voltage killed the MMM? They must've been really struggling to provide the current required to get that hot, so the first thing that comes into my mind is bad ripple; and Patrick has said before that high voltage ripple from overstressed LiPos can kill an ESC.

Just an idea, but given that there haven't been any other V3 failures...I'm not sure the MMM is at fault here.

[NickRummy]

My only question is why stress a speed control only hoping that built it safety features save it? Asking for trouble if you ask me.

Those 4800 packs are 25C const. and 35c burst I believe? I'd say you were definitely punishing them! That thing had to be a bullet on wheels while it was running....

[skellyo]

I'm going to have to side with the others here. Running a 2700kv motor on 6S and gearing for 80+mph is just crazy.

Originally Posted by skellyo

I'm going to have to side with the others here. Running a 2700kv motor on 6S and gearing for 80+mph is just crazy.

I concur, you are looking to fry something at that point.

any gearing that will bring lipos up to 150 is way to high.

[macr0w]

Originally Posted by skellyo

I'm going to have to side with the others here. Running a 2700kv motor on 6S and gearing for 80+mph is just crazy.

I'm with you.

This is definitely a case of operator error.

The title of this thread should read "I Killed My MMMv3"

[Jabe]

just hoping that its castle link that has broken down, not the monster...

Originally Posted by Jabe

just hoping that its castle link that has broken down, not the monster...

hmmm....you think that could be possible?.......I will try another one

I don't think it is the link, when my v1 died it did just that, heated up the castle link. that link still works fine to program my mamba25

[killajb]

"I'm going to blame it on Larrydino over at traxxas....I was trying to win the $20 for the first guy to hit 70 with the mmm...not really for the money...for bragging rights mostley

anyway ya I wont be trying that again"


Hmm.. maybe you should have provided this info in post that started this thread..

Originally Posted by killajb

"I'm going to blame it on Larrydino over at traxxas....I was trying to win the $20 for the first guy to hit 70 with the mmm...not really for the money...for bragging rights mostley

anyway ya I wont be trying that again"


Hmm.. maybe you should have provided this info in post that started this thread..

why?

[skellyo]

Did you pop the case and make sure the fan wires didn't get shorted together? It's worth checking to see.

Originally Posted by skellyo

Did you pop the case and make sure the fan wires didn't get shorted together? It's worth checking to see.

been trying to figure out how it opens ..but those wires sure look squeezed

[skellyo]

Originally Posted by bustitup

been trying to figure out how it opens ..but those wires sure look squeezed

You should just have to pull the label off and depress the tabs on the sides for it to pop apart.

[TexasSP]

I with the rest, I think this one is the fault of the "ahem" user and not the MMM.

I am glad I am not a speed freak, it keeps me out of trouble.

[killajb]

Bustitup,

The title of this thread is somewhat misleading based on what took place. I'mean sure, the MMM "bit the dust". But most who chimed in (myself included) think that your set-up was bit extreme.

I like to push the limit on some things, knowing the results could sometimes mean complete failure. Heck, I've been told that I have this weird sadistic laugh when one of my "experiments" goes awry. Still, I'm the first to admit fault when doing so amidst the carnage.