What is this BS Castle is feeding this customer? - RC-Monster Forums

Pdelcast · 11:54 AM

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

Sower · 05.13.2008, 11:49 AM

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

lincpimp · 05.13.2008, 12:48 PM

Quote:

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 · 05.13.2008, 01:03 PM

Quote:

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?

jhautz · 05.13.2008, 02:14 PM

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.

Joe Ford · 05.13.2008, 03:50 PM

Quote:

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. ;)

jhautz · 05.13.2008, 04:52 PM

Quote:

Originally Posted by Joe Ford

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. ;)

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?

crazyjr · 05.13.2008, 05:04 PM

Quote:

Originally Posted by jhautz

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.

Joe Ford · 05:58 PM

Quote:

Originally Posted by jhautz

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?

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. ;)

Toyman · 05.13.2008, 06:35 PM

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

jhautz · 07:10 PM

Quote:

Originally Posted by Joe Ford

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. ;)

Thanks Joe, I wasnt sure what your baseline was for "lower". Got it now. So all of this setup info is based on a 2200kv 1515/1Y on 6s? I would imagine running that same motor on 4s would not require the same battery capability either provided gearing didnt change.

Just to be clear can you confirm this for me...

Then with a 1512/3D (1700kv) shorter lower kv motor in a light 1/8 buggy and conservative gearing (35-40mph) I could run a lipo that isnt quite up to the 75A/125A specs and get away with it without damage to the Monster.

Sorry to be a pain, I just read all the bolony that has been posted the last couple days in this and "other" forums regarding the Monster and lipos that may not be up to the task causing the reported dead MMMs and I want to be clear is all. And hearing it directly from someone at CC is better than all the hearsay floating around at this point.

nativepaul · 05.14.2008, 12:47 AM

Quote:

Originally Posted by jhautz

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?

Good NiMhs are capable of that and more, holding reasonable voltage while doing it, just not for long, F5B flyboys were pulling over 300A from NiMhs in 3 second bursts before they switched to LiPos and boat and pylon guys were pulling close to 100A continuous, but at those levels your lucky to get half a dozen decent runs out of a pack before it either significantly drops capacity and voltage or goes pop.

Joe Ford · 12:19 PM

Quote:

Originally Posted by nativepaul

Good NiMhs are capable of that and more, holding reasonable voltage while doing it, just not for long, F5B flyboys were pulling over 300A from NiMhs in 3 second bursts before they switched to LiPos and boat and pylon guys were pulling close to 100A continuous, but at those levels your lucky to get half a dozen decent runs out of a pack before it either significantly drops capacity and voltage or goes pop.

100% correct...I'm one of those pylon guys...100A continuous plus in my F5D's...the batteries get about 10 cycles and then I throw them away. Same for the F5B guys. :)

For "getting away with batteries that handle less than 75A", NO, DO NOT DO THIS. If the controller fails due to ripple current we can't cover it under warranty, and you may lose your batteries in the process. Better to buy expensive, buy once.

lutach · 05.13.2008, 02:15 PM

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 · 05.13.2008, 02:43 PM

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….