60C really?

[hoober]

Originally Posted by Mentat

to settle this once and for all we should DONATE some packs and have them tested by someone here on RCM. I would be willing to donate a Thunder Power 5000mAh 4s1p 40c for testing purposes, provided i got it back once testing is completed. There are several here that i would trust to do this. Thoughts, suggestions? Lets do this and get some REAL WORLD feedback on these CLAIMS!

Why don't we try to throw something together in the off season? We can start with the maxamps pack. Is the goal here to check a pack's abiblity to deliver what it's ratings say it will? Or to put like packs in order of performance?

In any case I would like to test packs that are a "standard" size and as much capacity as possible , but limit to 2S. The standard size is what a 6 cell stick pack is and the standard 6 cell 1/18 scale packs as well.

Have I missed anyone?

dezfan $20
Unsullied_Spy $5
nitrostarter
lincpimp
FastXR
Bondonutz $20
rawfuls
FastXR $10
hoober $20

[Mentat]

Sure, i think it would be a great ideal, maybe we can get RC Monster (Mike) to do something official and get some of the companies to join in somehow. Rc Monster is big anyway, i think with a little help maybe we can get some standardized testing, or at least make this THE PLACE that people go to get the scoop on Real World Lipo Testing and reviews. Mike what do you think?

[BrianG]

I personally think Mike has enough on his plate. The last time I talked to him, he said he started growing another set of arms to keep up with the workload.

As far as what should be tested; I think the ratings should be substantiated at the very least. And provide the voltage per cell at that rating along with the temperature.

[hoober]

Originally Posted by BrianG

I personally think Mike has enough on his plate. The last time I talked to him, he said he started growing another set of arms to keep up with the workload.

As far as what should be tested; I think the ratings should be substantiated at the very least. And provide the voltage per cell at that rating along with the temperature.

We can (in addition to substantiating ratings) simply test at various levels of current. In other words, who cares what the rating or label says. Run the pack at 20C,30C,40C,50C and 60C and allow the voltage graph to speak for itself. Anyone can call it any way they see it. This process will in itself substantiate the ratings even if the operator has no idea which pack is being tested at the time.

[Just go Play]

After being away from the forums for a while I was looking forward to catching up on the latest products and such. Sadly I could not resist checking this thread out only to discover what looks to be a clone of the last debate around MA's latest product release.

For me the most disappointing things about this thread is that Austin no longer seems genuinely interested in addressing customers concerns with his product. The response given to BrianG's example of a specific and documented problem with MA product was appalling and more like something I would expect from Jason... I believe I have lost any respect that I had for Austin previously.

As for 3rd party testing of any of MA products I would not hold my breath. If I recall correctly the last time someone did that (with prior consent mind you) they were threatened with legal action if the posted test results were not removed.

Austin I'm certain that nobody enjoys having their company/product/person put down or portrayed in a negative manner, who would?

But if you are going to ask for specific examples of problems your customers may have had with your product in a public forum have the decency to acknowledge the ones that reply with valid documented concerns. If you are no longer willing to do so that is ok too. Just don't come around asking questions you don't want answered.

I do get a kick out of the advertising claims of the "best this" or "most powerful that". Very amusing stuff...

[Dafni]

Just go Play, I agree with you on all you said.

I felt the same after I read the thread. Haven't bothered to follow the MA story here lately, just came back to research some batt stuff, read this thread, and felt exactly the same as you.

[lutach]

Originally Posted by Just go Play

with legal action if the posted test results were not removed

Good thing my 2 3S 3000mAh MA packs didn't burst into flames. If anyone saw the pics I posted, they would see the packs were very close. I'll see where I put them and post them here again.

[lincpimp]

I would say to pull the pack down from full charge to 3v per cell (maybe 10 amp load?) and see what the capacity is. The done the load tests at 10-20-30-40c, etc. That way you do not need to even look at the label on the pack, just go by the data that you log. So you will get a real world capacity and current ability. Some oscillating tests from 1c to 40c over a few seconds, then repeated would also be interesting, just to see pack performance. Also noting pack imbalance after load testing would be handy.

[whitrzac]

Originally Posted by _paralyzed_

you mean this one

http://cgi.ebay.com/Rare-1-10-TAMIYA...d=p3286.c0.m14

OHHHH, I want it

[hoober]

Originally Posted by lincpimp

I would say to pull the pack down from full charge to 3v per cell (maybe 10 amp load?) and see what the capacity is. The done the load tests at 10-20-30-40c, etc. That way you do not need to even look at the label on the pack, just go by the data that you log. So you will get a real world capacity and current ability. Some oscillating tests from 1c to 40c over a few seconds, then repeated would also be interesting, just to see pack performance. Also noting pack imbalance after load testing would be handy.

I agree, very meaningful tests.

[bcltoys]

Novak lists there hv6.5 at 730 watts is this surge watts please help me understand i stupid.

[whitrzac]

Originally Posted by bcltoys

Novak lists there hv6.5 at 730 watts is this surge watts please help me understand i stupid.

it means that its a low power motor...

[bcltoys]

Im trying to understand maxamps surge watt rating with the hv6.5 motor as this is the only brushless motor i have to compare to there surge watt bs.

[suicideneil]

I believe that would be maximum continuous watts, most BL motors I've looked at for typical MT or 1/8 scale use are in the 900watt upto 1500watt range.

The novaks are still pretty good at shifting lighter weight stuff, and dont consume as much go-juice in the process compared to say an MMM or Rx8 etc.

However, DO NOT GO BY THE SURGE WATTS RATING ON MAXAMPS LIPOS AS ITS TRIPE, AND DO NOT TRY TO CALCULATE HOW MANY SURGE WATTS YOUR SETUP WILL USE AS ITS NEAR ENOUGH IMPOSSIBLE.

Use common sense (if you have any) and read around to learn about proper lipo choice for any given motor/esc/vehicle setup- there are zillions of threads here, so use the search button.

Or just buy a pair of 30c 5000mah 2s lipos from hobbycity.com.

[suicideneil]

You wont be able to, as like I said, its near impossibble to tell how many watts your system is developing under acceleration (surge) without the use of an EagleTree data logger or similiar item. Even then, you may not capture the largest spikes with total accuracy, as it samples the current and voltage (volts x amps = watts) every 10milli-seconds I believe, so you may only catch the start of the spike of the tail end of it.

Typically, I've seen spikes in the 120-130amps region for normal BL setups running 4-6s lipo, so thats somewhere in the 2000-3000watts region. A decent 4s 25c 5000mah lipo can deliver 1800watts, or 6s 2700watts, which is pretty much fine- the hvmaxx being a less powerful system will draw somewhere around 80% of what a 1000watt motor will do. Thats an educated guess though, havent seen many, if any Eagletree sessions carried out on a hvmaxx- might be a question for the novak techs perhaps, though I imagine they will just give you 'on paper' ratings rather than real world test results, which is understandable.

Buy the best batts you can afford at the end of the day.