1/8 Buggy w/ a Outrunner Motor - RC-Monster Forums

jhautz · **1/8 Buggy w/ a Outrunner Motor -** 12.10.2006, 12:39 AM

Here are a few pictures of my latest project. Its a Cen Matrix that I am going to try a Cyclon outrunner motor in. The motor is a Cyclon 2000. W/ a Mamba Max on 5s Lipo. I have been thinkig about these motors for a long time and I found a deal I couldnt pass up so I figured what the heck should be a pretty nice application for it. The mamba maxx seems to run it pretty nicly. Although I have not had it ooked to the drivetrain yet. Just spinning freely to test the system out.

Its a long way from finished...These pictures just show it with everything set in place for a basic layout. Nothing is tied down permanently yet and the wires are all over the place. Lots of work still to do.

The peak amps it calls out on the cyclon data sheet is only 65A. I figure that it should be enough to make it get up and go.

Anyway this should be a 1100-1200 watt setup... Anyone know how many watts would be needed fo a good racing setup on a buggy like this? I'm am thinking about taking this to the local indoor track (well not so local... Its 1 1/2 hours away) and trying out racing against the nitros with it.

Is there a target wattage I should be shooting for in a racing setup that is not over the top? Maybee 4s would be a better chioce?

Any other sugestions? One thing I was thinking about was moving the center diff a little farther over to the motor side so I can get the battery closer to the center line? And the final battery position will probably be a little farther forward for better balance. Not sure on that yet.

zeropointbug · 01:28 AM

Hey! Nice man! I have wanted to try an outrunner myself for a long time, i was up until a month ago, but decided to go 7XL... i was thinking about the E-Flite Power-46 motor, it's 670Kv motor, which should be able to drive a differential directly. It's rated for 55A burst, it had reversible shaft and everything.

That motor looks nice too, even though it's 65A, doesn't mean it won't perform! I here they perform in real world apps better than inrunner's of the same 'rated power' or peak amps. Are you sure you need a diff in there?? That seems like an awfully geared down setup, and i think it would be slow slow. What Kv motor is it?

zeropointbug · 12.10.2006, 01:25 AM

BTW, how is everybody posting pics larger than 640x480? That's all i can do...

jhautz · 01:37 AM

Quote:

Originally Posted by zeropointbug

Hey! I have wanted to try an outrunner myself for a long time, i was up until a month ago, but decided to go 7XL... i was thinking about the E-Flite Power-46 motor, it's 670Kv motor, which should be able to drive a differential directly. It's rated for 55A burst, 800watts cont. it had reversible shaft and everything.

That motor looks nice too, even though it's 65A, doesn't mean it won't perform! I here they perform in real world apps better than inrunner's of the same 'rated power' or peak amps. Are you sure you need a diff in there?? That seems like an awfully geared down setup, and i think it would be slow slow. What Kv motor is it?

Its a 2093kv motor with a 40K rpm limit. They have some kind of diferent tecnology in it that they say it has all of the torque of a 10K outrunner, with 4 times the rpm so it has even more ''power'' than a conventional outrunner. Their cell limit is 16 or 5s for this motor. They claim that it is the highest power to weight ratio motor anywhere. I'm hoping that it does have the torque it claims so I can really play some games with the gearing. We'll see I guess.

You can read more about it www.cyclonbrushless.com

Quote:

Originally Posted by zeropointbug

BTW, how is everybody posting pics larger than 640x480? That's all i can do...

I use photobucket.com

MetalMan · 12.10.2006, 03:28 AM

I would say, "Go for it!". If it doesn't work out well, then you can play around with the gearing.

Serum · 12.10.2006, 04:55 AM

Nice!

Did you tested these Enerland cells yet? got an Eagletree?

jhautz · 06:23 AM

Serum, this is probably the 10th time you have asked me that and I can finally say......
Yes, I do have data from eagletree on these cells.:018:
Just got the eagletree a few weeks ago. The data is obviously not from this model, but I did run this pack in another 1/8 buggy I have.

It was set up w/ a Quark125 a Lehner 1940/7 and this 5s pack geared to 16/46.

I was pulling 130amps (over 30C on these 4350mah packs.) The voltage dropped, but it handled it no problem. I didnt hook up the eagle tree until the very end of the pack (you can tell by the resting voltage being just barly over 18.5) so I'm not sure how valid this data is, and it was also only 40 degrees F outside so the cold weather didn't help the lipo packs.

Here is the data.

This is the only pack I have tested so far. Not sure what I should expect from them under these conditions. They seemed to perform pretty well to me under the conditions.

coolhandcountry · 12.10.2006, 10:10 AM

That is pretty tight. Have you got a test run on it yet. I have seen them in a crawler but not in a buggy or speed truck.

MetalMan · 12.10.2006, 12:39 PM

That battery is holding up pretty well IMO. 130amps (37C!) @ 3.2v is not bad at all, considering that the graph shows the voltage after wiring losses.

jhautz · 04:02 PM

Quote:

Originally Posted by coolhandcountry

That is pretty tight. Have you got a test run on it yet. I have seen them in a crawler but not in a buggy or speed truck.

No haven't tested it yet. Its not even close to being finished.

As far as the motor goes, its a little different than a typical outrunner. It has a 40K rpm capability due to some kind of wiring that makes it act like a 4 pole motor to the controller allowing the high rpm from an outrunner that is normally limited by the controller frequency capability. I am not sure what to expect from this thing, but being the optimist that I am... I am hoping for all the torque of an outrunner, with the rpm of an inrunner. (the best of both worlds) I'm sure there will be some sort of compromise, I'm just not sure what it will be.

Bench testing w/ a mamba max it runns nice. Also bench tested it on a QUark125, and also ran good. I am going to test it on a BK controller also, but I expect that it will not run very well. The BK's dont handle the motors with more than 2 poles well.

Serum · 12.10.2006, 04:06 PM

Freaking good cells!! 3.38V at a 130A load.. Awesome..

You got them cheap, right?

I am also very interested in this outrunner.. Please keep us informed! i will keep a close eye on this thread.. 130A at 3.38V.. Fewwww that's a great 5S pack you've got.. These cells deliver you the 3.5V per cell at 100A load.. Awesome..

jhautz · 12.10.2006, 04:50 PM

Quote:

Originally Posted by Serum

Freaking good cells!! 3.38V at a 130A load.. Awesome..

You got them cheap, right?

I am also very interested in this outrunner.. Please keep us informed! i will keep a close eye on this thread.. 130A at 3.38V.. Fewwww that's a great 5S pack you've got.. These cells deliver you the 3.5V per cell at 100A load.. Awesome..

Yes. They were a ''good deal.''

MetalMan · 12.10.2006, 05:19 PM

Quote:

Originally Posted by Serum

Freaking good cells!! 3.38V at a 130A load.. Awesome..

You got them cheap, right?

I am also very interested in this outrunner.. Please keep us informed! i will keep a close eye on this thread.. 130A at 3.38V.. Fewwww that's a great 5S pack you've got.. These cells deliver you the 3.5V per cell at 100A load.. Awesome..

Serum, we must be seeing the graph differently. At 0.9 minutes I'm seeing the 100amps, and the pack voltage at 16volts. 16volts/5cells = 3.2v/cell.

Serum · 12.10.2006, 05:30 PM

Yeah, my bad.. I meant 3.23 instead of 3.32 Look at the minimim voltage under the graphic. Not bad either IMO.. These babies do a 3.5V at a 100A load though..

jhautz · 12.10.2006, 06:30 PM

Also remember this is the very tail end of the pack charge. They literally dumped like less than 1 minute after this graph. Next time I get a chance to run them I will redo the graph with a fresh charge. I'm sure it will be much better.