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-   -   Emaxx Dual brushless with smaller motors (https://www.rc-monster.com/forum/showthread.php?t=6883)

jhautz 05.24.2007 03:53 AM

I agree w/ serum... dual motor setup is not an ideal solution IMO. It adds a ton of complexity to the whole setup, not to mention weight and wires all over the place. It will look like a very symmetrical spaghetti bowl :005:

A simple, clean setup can be a very beautiful thing as well. I would focus more on quality than quantity.


If you are looking at Lehner motors, the 1940 is more than enough in single format. Dual 1940's would do nothing except shred gears. Cant go very fast with shreded gears.

Dafni 05.24.2007 05:41 AM

I agree with Starscream and Jhautz.

I take simplicity over symetry any day. But I never understood this shelf queen thing anyway.

And with no gain in performance, the decision is obvious to me.

Efficiency is the most important factor when you want to actually run your BL truck.

Gustav 05.24.2007 07:31 AM

all true,but,on the other hand,two MM escs can handle twice the power of one,and since there's a shortage of high power controllers,sharing the work load between two doesn't seem like the worst idea.

Serum 05.24.2007 08:54 AM

Gustav; One mm controller can take the maxximum power from a lipo pack, at a more efficient factor than a dual setup.

Dual is a nono for me. (as well as for other users) but if 0700 wants a dual setup, we need to advise him what we think is best.

aqwut 05.24.2007 09:14 AM

I had duals, and triple setups... I do like the single setup much better. Hey, if you want it to look symmetric, put ur ESC inside the can of an empy motor and mount it on the other side:005:

Procharged5.0 05.24.2007 09:41 AM

Quote:

Originally Posted by aqwut
I had duals, and triple setups... I do like the single setup much better. Hey, if you want it to look symmetric, put ur ESC inside the can of an empy motor and mount it on the other side:005:

Interesting idea.

Then add to that idea......>>>>vent one end of the can and put a fan on the other end for a cross flow cooling arrangement. Interesting......

Gustav 05.24.2007 12:47 PM

Quote:

Originally Posted by Serum
Gustav; One mm controller can take the maxximum power from a lipo pack, at a more efficient factor than a dual setup.

Dual is a nono for me. (as well as for other users) but if 0700 wants a dual setup, we need to advise him what we think is best.

Yeah,i know,dual is not something i'd do either,ideally, but i can see a case for it,sort of.It's hard to recommend a 6-8s controller at the moment,that's why.
You'd have to have some hot motor on 4s to keep up with a pair of milder systems on 4s,closes the efficiency gap a little if you're chasing a certain amount of power,at least it won't thermal.Also,using a pair of cheaper,lighter 4s packs,since you'd be taking less current from each,helps some with the cost and weight difference.So say you're taking 70% of the amps each,from a pair of 4s packs,that you'd be taking from a single,more powerful 4s pack with a single big motor and single esc,you'd still be up on power whilst being down on temperature and load on each esc..

So i'd take it over running a single mega hot motor,although it's not ideal,going higher voltage with a single system is.Me personally,i'm building everything light these days so i can run cool 4s setups (single),35mph is enough for me,i just want a cool running,hassle free setup that is nice to drive and has plenty of snap.the novelty of running huge power up and down in straight lines wears off,then you just want to get on with driving.until some alternative high voltage controllers come along,then i might build some big monsters again.

0700,do you have an idea what you want to spend? and if you want to make them useable as single systems in other applications?

suicideneil 05.24.2007 12:53 PM

Quote:

Originally Posted by Procharged5.0
Interesting idea.

Then add to that idea......>>>>vent one end of the can and put a fan on the other end for a cross flow cooling arrangement. Interesting......

I do actually like that idea- put a small ducted fan on one end of the empty can and turn it into a mini wind tunnel. That should keep the esc cool.:028:

0700 05.25.2007 02:03 PM

You guy have been great, you've definitely got me shopping for a single motor/controller combo....so far I'm looking at these...

neu/quark - $600?
novak 4.5 - $250?
MMM - $350 - not released
Traxxas - $? - not released

Procharged5.0 05.25.2007 02:06 PM

Skip the Novak piece.

The MM/Feigao combo is good
The MM/Lehner combo is better
Quark NEU is very good


depends alot on your budget.
the Warrior 9920/Feigao 8XL/9XL offers great "bang for the buck"

0700 05.25.2007 02:31 PM

Should I wait on the TRX or MMM? I talked to the engineer at castle, he said they're aiming at neu/quark level, but at a lower mass market price?

And of course, now TRX wants to joust with them.

Procharged5.0 05.25.2007 02:39 PM

Should you wait...........

Very good question. It will probably be several months (Minimum) to a year before either is available. How long can you wait?

Last year I was in the same position. I deceided not to wait and bought a MM with a NEU 1515 with the intention of moving the MM to another lighter truck and buying the MMM when it comes out. Well, I'm still waiting! LOL!

suicideneil 05.25.2007 02:42 PM

I'd talk to the engineer again and ask for an approximate release date- give or take a few months- otherwise we'll all be grey & old by the time its released...

Procharged5.0 05.25.2007 02:43 PM

Quote:

Originally Posted by suicideneil
I'd talk to the engineer again and ask for an approximate release date- give or take a few months- otherwise we'll all be grey & old by the time its released...

:005: That's entirely possible!

0700 05.25.2007 03:17 PM

He said they JUST got their motor supplier issues worked out, they wanted neu, but he didn't have the capacity they needed. They're testing samples now and expect good news in July.

0700 05.25.2007 03:24 PM

The $560 neu/quark setup is temping, esp if I could find a deal....

Procharged5.0 05.29.2007 11:16 AM

Quote:

Originally Posted by 0700
He said they JUST got their motor supplier issues worked out, they wanted neu, but he didn't have the capacity they needed. They're testing samples now and expect good news in July.

Who shared this new info with you????

Serum 05.29.2007 12:22 PM

I'm with procharged.. Who.. ?

0700 05.29.2007 01:18 PM

Engineer guy who picked up the tech support line. Said the controller has been done for a very long time, the hold up has been a motor supplier who could meet the quality AND production numbers they needed to release the product en mass.

I was very impressed with their business attitude in general and I'm happy to wait a few months to get a product with so much thought behind it.

Procharged5.0 05.29.2007 01:27 PM

Quote:

Originally Posted by 0700
Engineer guy who picked up the tech support line. Said the controller has been done for a very long time, the hold up has been a motor supplier who could meet the quality AND production numbers they needed to release the product en mass.

I was very impressed with their business attitude in general and I'm happy to wait a few months to get a product with so much thought behind it.

I'm a Castle fan, but in all seriousness, I've heard this before.....almost one year ago! Then again at the iHobby show in October, then again at....

Serum 05.29.2007 01:39 PM

Yes, same old..

But they can't keep that up forever.

They should look at traxxas; launch a mistic V for 3 days, and bam, there is your system.. Including flashy hopups for the vehicles they put it in..

suicideneil 05.29.2007 05:27 PM

I saw it on a reply to a Youtube video of an Emaxx running a single MM & 6700kv motor (I think). Im with you though Serum, it cant take a year or more to find a good motor supplier, they could have built and stock-piled their own in that length of time...

Procharged5.0 05.29.2007 05:32 PM

They could have had someone OEM a limited number while they were developing their own. There are quite a few brushless motor manufacturers out there, especially if you include the industrial motor segment.

BrianG 05.29.2007 05:42 PM

Quote:

Originally Posted by Procharged5.0
They could have had someone OEM a limited number while they were developing their own. There are quite a few brushless motor manufacturers out there, especially if you include the industrial motor segment.

The trouble might be finding a company that will set up a special process for the price and for such a small amount compared to the number of industrial motors they produce.

Procharged5.0 05.29.2007 05:47 PM

I agree, but sometimes you find an off the shelf part that works or is close and only requires minor mods to be a good fit.

554/550 motors are not terribly unusual so it's possible. Finding one that was 88%+ efficient or with an accceptable Kv rating are probably the big issues.

suicideneil 05.29.2007 06:12 PM

Did CC make the MM motors, or does someone else make them for them? A longer can version of their existing range might be suitable, assuming its possible to add more winds for a lower KV rating...

BrianG 05.29.2007 06:29 PM

Depending on what the current winds are, they may not need to increase them as the kv will go down as the motor gets bigger for the same wind count.


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