What is this BS Castle is feeding this customer?

[BrianG]

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

[lutach]

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 . Let's see what he'll say in rctech http://www.rctech.net/forum/showthre...58327&page=212 i'm post # 6347.

[lincpimp]

Originally Posted by Pdelcast

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

Patrick

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!

[Sower]

Originally Posted by Pdelcast

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

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?

[lutach]

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.

[jhautz]

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.

[lutach]

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.

[jfruge]

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?

[JerryF504]

Originally Posted by dezfan

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.

[Joe Ford]

Originally Posted by jhautz

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.

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. ;)

[Joe Ford]

Originally Posted by What's_nitro?

That's what I thought. They just don't want people using under-rated batteries for safety's sake. I would like to know where the thought of damaging an ESC in that manner came from...

EDIT: Also, it should be worded differently in that the higher output batteries are needed for use with the CC MOTORS, not due to the ESC!

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. :)

Originally Posted by JerryF504

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

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

[JerryF504]

Originally Posted by dezfan

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.

[DRIFT_BUGGY]

Originally Posted by Sower

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?

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