It's probably just a safety blanket statement until more details can be found. No sense in people blowing more packs until the issue can be pin-pointed.

It's kinda like if you smell something burning in your kitchen and you aren't cooking anything. You unplug/unhook everything to eliminate all causes. Then, you look into what's going on. Once you find that small piece of bread jammed in the toaster, you plug everything back in. OK, bad analogy, but you get the idea. :smile:

Squeak, squish!
 

Ah, yes, maxmaps are but a small piece of blackened bread in the kitchen that is rc!

No makey sense!

Or, it's possible it was a single phone call where the context of the conversation was much different than that portrayed here online. Seeing as how we haven't seen any notice from Castle to discontinue the use of MA packs, I'd think this was probably a miscommunication somewhere. But, it still would be nice to see someone from Castle specifically say, "No, that's not what we said/meant", or, "Yes, don't use MA packs for reason XYZ".

Being the information was posted by a person that is neither a rep of CC or MA and neither company has come forward it is nothing but hearsay. Patrick posted yesterday in another thread here that only 4 MMM's were called in as dead, and 2 of those were running TrueRC packs that never got warm.

also they only say the "CC support guy", I'd like to know who he talked to, it's not like Castle is a huge company in number of people.

It just does not sit right. Someone form either company would have said something publically by now.

On another note....

I'm just glad you're in south FL Dicky. I don't want to catch any of your bad juju on my MMM's. :mdr:

As intrigued as I am, it's all speculation until CC or MA stops in to clear this up.

Hi Guys,

Austin here with MaxAmps. The speed control does not determine the amp draw, the motor does. If the motor is pulling more than 120 amps constant, go with an 8000 pack. Most people are going to want more than 3 minutes of runtime anyways.

For the record, MaxAmps packs can be used with the MMM speed control. Depending on what MaxAmps pack you are using and the amp draw of the motor, you may need a different pack. I think that is what castle is trying to say. If you try and run any 4000mah pack with a 200 amp constant motor, you are going to have trouble. It has nothing to do with a MaxAmps pack vs another manufacturer.

Hope that makes sense,

Austin
CEO MaxAmps.com

Ask and ye shall receive!! :yes: Nice Austin, thanks for stopping in!

I still think you're geographically too close to Dicky. You should either move or send me your MMM just to be safe. :wink:

I appreciate you stepping in here to dispell this rumor. I couldn't honestly believe that anyone at Castle or Maxamps would tell a customer such things.

Yes, thanks Austin! 3 pages of speculation was 2 pages too many IMO. :smile:

:lol:

That just sound wrong :rofl:

Brian, come out to the track Wed night and check out the Monster. I have two... you can try one out for the week if you like. :intello:

Yeah, that did sound bad didn't it? Oh well.

I was planning on going to the track anyway. Any idea what classes are planned to run and what time we're starting? I'd like to run the buggy if possible. Or maybe the Revo or CRT.5. Don't want to run the Jato because it's too tempermental for me, especially since I'd be in the mod truck class with the other pros.

I'd like to see the MMM, but don't want to take the chance to smoke it. Besides, all my setups use ESC mounts that are too specialized to switch between ESCs that quickly.

It may have been said before but I didn't feel like reading every post. There is no way that an under-powered battery can kill an ESC! The LVC would hit and it would shut down. I can't figure out where CC is trying to go with this one... Are they trying to protect their earnings by telling people to buy better quality batteries so that the system will perform as advertised? It's up to the end-user anyways to make sure his/her components are matched properly. If something fails, like a battery getting too hot, then it's their fault for not matching the battery to the job. I don't see why CC is concerned... Further more, why would MA be saying "don't buy our stuff"? They should say "only buy our 6000 packs or bigger" or something like that and tell people why!

Help me understand better how the MaH of a battery make a difference in the amp draw? I thought the discharge rate such as 25C and 30C makes the most difference in amp draw and that the MaH affects mainly the runtime.

You may not want to read every post, but you should read post #47 on this page from MA. About CC, we still don't know the full story until Patrick or another CC rep states their side.

:rofl:

Sorry guys,

I think this was a misunderstanding on the part of one of our Tech support guys -- he wasn't aware of the newer Maxamps packs that could handle more than 15C.

The official stand of Castle is that any pack that can handle 75A continuous, and 150A peak is sufficient for use with the MMM.

Austin -- Sorry about that! You are right, there was a misunderstanding and it wasn't meant to target Maxamps in particular.

Patrick

Thanks for stopping in Patrick and clearing this up for everyone.

So there we go. Responses from both Castle and MaxAmps. Rumor squashed...

I know who he is and this is where he lost me: http://www.rcuniverse.com/forum/m_60..._1/key_/tm.htm post # 13. He was using a 300A Schulze controller before Schulze had a 300A controller and if you keep going you will see when I asked him in post # 51 for a picture. After that he was gone :lol:. Let's see what he'll say in rctech http://www.rctech.net/forum/showthre...58327&page=212 i'm post # 6347.

Is this for 4s or 6s? If so then the 4000 packs should do, while a bit close they are rated for 80 amps cont. The 5k packs may be a better bet, at 100amps cont they offer a 25% margin.

How are you determining the 75amps? What motor are you basing this on?

Thanks for the info Patrick, much help you are!

So by this standard, my NeuEnergy 6s 3900 20C battery will be fine . . . . right? Or am I too close to the 75A continuous requirement at 78A?

A lot of people are still running 3-4S and that's where a higher AMP rated cell will have to be used. When you step to 6S I don't think you would see a lot of high AMP. I get 80A or so spikes with my MBX5T geared for around 45mph. Now my BPP is a heavy truck and I have seen close to 170A spikes, but when I don't want to go fast, I usually see 90A spikes.

So how can they list in the specs that 18 cell NiMH or NiCD is ok? There is no way that NiMH or NiCD can deliver that kind of current.

This still doesnt make sense to me.

With 6S, I was able to run 20+ min. with 2200mAh cells and my average AMPs were 10A (9.92A to be exact). The spikes were between 70-128A. The Monster Max for being a fresh design is not showing any sign of a design flaw. All I think is happening are a few Switching BEC that have gone bad. You can't blame Castle for that as Castle don't make the components. I sell electronic components and some times my clients try to blame me for faulty components, but it's not my fualt.

Guys, Here is my take on the past week……I feel we need to bring things back into the real world . The sky is not falling and the batterys that were working before the MMM came out should still work now. Sure we have spikes of high amps when running these 1/8th scale conversions. They are short lived and are "Burst” amps. @ the end of the day… if you geared for 15+ minutes per pack of 4s1p 5000 20C or better cells you should more than fine on the battery C rating side of the setup. The “continuous” load on the pack @ that rate is 20 amps or less or 3C or 4C…. If your not hitting the LVC during the run and your lipo pack is coming back under 140F IMAO your pack is doing a good job.

I / we use these same type cells / packs in FE boat racing and we dump ½ or more of the capacity of the pack in about 1.5 minutes…..and we still get good cycle life from the cells if we stay below 150F or so….
I hope we can get back to good posts and things return to normal soon….

So, any new MMM failures been heard of today?

Mine failed yesterday. The mailman just picked it up to bring it back to Castle anout 30 mins ago.

You don't need a lot of current if you were to run a lower kv motor with light gearing...it's all how you use the controller. ;) For the R/C industry you're probably not going to find many people running NiMH cells with the Monster, but we had to put it up there or I'd be answering a lot of emails. ;)

Actually insufficient batteries CAN damage an ESC from ripple current. That's why we want you gents using batteries that are more than sufficient for your system. :)

Same as the others? Just lights out, or did you let the genie out of the bottle?

No, lol, it was the same as the others. I let off the throttle and coasted for a few feet and when I went to accelerate again there was nothing. BEC showed 1.09 volts and no communication with the Castle Link.

Well isn't it 3900 x .02 = 78A
MAH x .0C = A

But in the extra card that came with the MMM it said that it required a minimum of 75A continuous and over 125A burst. Why would this statement be accurate then?

I think its, for the new to brushless guys, that don't have the experience we have, to determine what loads we will put on them.

That is with the 1515/1Y in a typical setup. I stated if using a lower kv motor and light gearing you could get away with NiMH. ;)

I have a MMM on the way from Mike, I run Nimh will my 14 cell GP 3300's and 8XL work ok??? Steve

and im close to that im running a 9xl and either 14 gp3300's or i built 2 8 cells packs, that i plan on running too. Yes i bought a lot of gp3000's along time ago.