Neu and Mamba Max Combo - Page 4 - RC-Monster Forums

Serum · 02:34 PM

Well, the higher the mAh rating of a cell is, at the same given discharge C, the higher the power is the cells can provide.

4S should be enough for 45 mph. use good cells though, if you go maxxamps, go for a 2P setup.

5S will give you a higher voltage (logically) and at a higher voltage, the setup becomes more efficient. you can use 4S of 4000's or 5S of 3200's to get about the same runtime. Hope this makes sense.

riceman · 02.16.2007, 02:29 PM

Quote:

Originally Posted by Serum

Well, the higher the mAh rating of a cell is, at the same give discharge C, the higher the power is the cells can provide.

4S should be enough for 45 mph. use good cells though, if you go maxxamps, go for a 2P setup.

5S will give you a higher voltage (logically) and at a higher voltage, the setup becomes more efficient. you can use 4S of 4000's or 5S of 3200's to get about the same runtime. Hope this makes sense.

Good point. This would be assuming you are running at the same speed (i.e. what you are limited to by the track)?:032:

BrianG · 02.16.2007, 02:32 PM

I did not factor in mAh because it really does not "directly" affect speed (more on this later); it affects runtime more than anything. And an actual runtime calculation is all but impossible because of the multitude of other factors (drive style, ambient temperature, terrain, wind resistance, drive train resistance, etc).

Now, a low mAh battery can affect top speed indirectly. A low Ah cell usually can't provide a given current without dropping more voltage than a higher Ah/C rated battery can. Example: If you have a 3Ah battery, it's voltage will tend to droop more when drawing, say, 100A. A 10Ah battery will usually have an easier time providing 100A with less voltage droop since the C rate won't be as high. This voltage droop can affect top speed since less voltage is available to the motor/ESC.

This is why I have the ability to select different voltages per cell. You can approximate the droop and then calculate the speed based on that value.

Sower · 02.16.2007, 02:43 PM

Nice info guys. Thanks.

Well, I think I might be back to the MM/Lehner now, and go with a larger 4 cell pack and just make sure it's a nice cell. Like a Trakpower or something.

Serum · 02.16.2007, 02:31 PM

Yes. the same speed is a given. sorry for not mentioning it.

It simple takes an amount of energy to drive at a certain speed.

Serum · 02.16.2007, 02:50 PM

For the ~120 bucks they cost in the states, you can't go wrong with the hard cased trakpowers!

Sower · 02.16.2007, 03:01 PM

Quote:

Originally Posted by Serum

For the ~120 bucks they cost in the states, you can't go wrong with the hard cased trakpowers!

Yeah, that's true. Is the 4900mah going to be enough though? I wonder if I should look at something like an Enerland closer to 6000mah.

Sower · 02.16.2007, 03:07 PM

Maybe this one:

http://cgi.ebay.com/Enerland-Lipoly-...QQcmdZViewItem

Although I guess that's only an extra 100mah over the Trakpower. Wow, I feel smart.

Serum · 02.16.2007, 04:09 PM

Trakpower uses a special grade of enerland cells. they are not 'just' enerland cells.

and since two trackpowers are cheaper, the answer is obvious.. :p

Sower · 02.16.2007, 04:38 PM

Quote:

Originally Posted by Serum

Trakpower uses a special grade of enerland cells. they are not 'just' enerland cells.

and since two trackpowers are cheaper, the answer is obvious.. :p

Right. I was actually thinking of doing that - putting two of them together would make it a 4 cell 4900. I was looking at a couple of the other 2 cell Enerlands too. Not as tempting as the two Trakpowers. What do you thik Serum - are the two Trakpowers, the Lehner 1950/7 hi-amp, and MM esc going to give me a great system that will stay cool?

02.16.2007, 09:24 PM

I don't know if this means anything, but I just tried to program my MM and when I started the app, it told me that a firmware upgrade was available. Is this the fix?

glassdoctor · 02.16.2007, 10:42 PM

I wish it was...

Serum · 02.17.2007, 04:06 AM

Nope, the update is a fix for the lipo cell count..

Yeah, the setup you have in mind will be awesome!!

02.17.2007, 04:39 AM

That's funny, because I've never had a problem with my MM detecting the cells. In fact, I wasn't even aware of this issue. We just happened to finish my friends 8ight tonight. We got the MM in from Mike today. Plugged everything up, jacked in a 4S pack and it only beeped twice. I wasn't happy, after what he had been through dealing with Finedesign. I decided to try the flash with the new firmware and all is well.

I suppose we should just keep twidling our thumbs, or perhaps just go out and buy a Quark. I really wanna get that Neu. For some odd reason, I just don't find the Lehner as appealing.

Sower · 02.19.2007, 11:09 AM

Quote:

Originally Posted by AAngel

That's funny, because I've never had a problem with my MM detecting the cells. In fact, I wasn't even aware of this issue. We just happened to finish my friends 8ight tonight. We got the MM in from Mike today. Plugged everything up, jacked in a 4S pack and it only beeped twice. I wasn't happy, after what he had been through dealing with Finedesign. I decided to try the flash with the new firmware and all is well.

I suppose we should just keep twidling our thumbs, or perhaps just go out and buy a Quark. I really wanna get that Neu. For some odd reason, I just don't find the Lehner as appealing.

I'm just curious - what about the Lehner don't you like? Other than what Serum mentioned about their disco packaging. They should put a few rinestones around it or something and just go all out.