New 3905 E maxx AXI Outrunner setup
 

Just call me the outrunner motor man. LOL I guess I'm a little obsessed with them. They are very powerful, very efficient, and present a new challenge in gearing and configuration. I like it. :yes:

With this setup, we're using the factory Revo style slipper and mod 1 gears.

Motor choice is an AXI 2826/10 with the fan added. The AXI is spinning one of Mike's 22 tooth Mod 1 Pinions. The 5mm Motor shaft length is 20mm so it goes all the way to the end of the pinion. Perfect and tough!

Spur choice is a Nitro Revo 40 tooth Mod 1. It fits the slipper, afterall it is patterned after the Revo.:yes:

The ESC is a Monster Pro 125 amp modded with a Novak 2700uf Cap. It's hard to see in the picture, but it's secured to the rear shock tower.

I added a fan over the ESC just in case we need it when it comes to 6S setups and higher gearing. This is powered by the BEC. Power for this is picked up at the Receiver.

There is a CC BEC there that has been turned up to 6 volts. This makes the steering stronger and more responsive.

She just had her first run. I love it. It's a torque monster. It will flip on it's lid from a standing stop if it's getting good traction.

I played with the slipper some. Too loose isn't good for acceleration and too tight defeats it's purpose. I backed it off where I knew it was too loose, then tightened it, trying it each time in 1/4 turn increments. It will slip under a big drivetrain shock with how it is set now.

Can't wait until the 2 speed kit is released. Running this is like running in 1st gear. Loads of Torque, but only about 28-30mph top speed. 2nd gear should push this over 40mph.

The motor isn't struggling or loaded at all. WOT from a standstill or any speed is fine. This doesn't cog at all.

I love how efficient this is. Warmest the motor got might have been 90 degrees. The ESC was cold. Lipo's were cold.

First run on 4S 5000mah Lipo lasted 38 minutes! :yes:

Check this out.
http://i160.photobucket.com/albums/t...m/DSC06780.jpg

Great! 6S on a monster 125 would be unique though!

what makes you think the maxx is now in 1st gear and not in 2nd?

http://www.traxxas.com/products/elec...maxx_trans.pdf

i can't seem to find any hints in that direction anywhere. can you confirm?

Pretty cool. So the tranny is taking it huh? I destroyed my Wheelie king rear diff the other day with a teeny 2221 outrunner. No slipper.

Serum, if you look at the parts listing it shows a number and description for the 2 speed. 1st is slightly lower at 2:1 and second is 1.16:1. Current ratio is 1.83:1.

the tranny of the new maxx is pretty tough John.

the wheelieking; what happened did the ringgear got loose from the cup and got damaged?

What are you seeing what I am missing Linc?

Here:

3rd page , #3973 & #3974

Interesting. Shimmed right, my WK rear diff holds up fine to a 2826 710kv on 3s Lipo with direct drive. Driveshafts (including CVDs) on the other hand...

Lookin' good, sike! To me that motor seems too small for the E-Maxx, but I suppose it is just based off of my experience with lower quality (I think) outrunners that heat up more.

On the Gear ratio's, that is correct.

1.84 is very close to the first gear ratio of 2:1, that's why I said that.

There is a difference in the wide ratio gears and the close ratio gears that are "soon to be released". I will go with the wide ratio set.

Yes it's going to handle it very well. This transmission it tougher built. I don't anticipate any problems with it. :yes:

I love how these diffs are. They slip less in the differential action when climbing my dirts piles. LOL

I'm gonna be putting some of that thick grease in my Revo diffs. :yes:

My WK probably isn't shimmed right, but it was a 4400kv outrunner on 4s, so there was a bit of load.

AXI Quality is very good. Big Things come in small packages. LOL

It makes good power and the added cooling fan helps control temps. It moves a good quantity of air, especially with the higher kv. It sounds like it's screaming when the rpm's are up. A high pitch.

I've only ran it on 4S so far, we'll see how things go when I bump that up to 5S and then on to 6S.

I just ran this on 6S. Top Speed is MUCH better at around 40mph. Temps are still well in hand.

The warmest the motor got was maybe 100 degrees. ESC was cold, Lipo's were cool. No Worries on Temps.

It doesn't seem like this motor is loaded at all with this gearing. It just screams. WeeeeEEeEEEE WEEEEEeeeeeeeee. LOL

She will wheelie at speed now and backflip if you're not easy on the trigger finger.

I really like the Mod1 gears. Mike makes some really tough pinion gears. 2 runs, no wear, and no worries. I can tell the Mod1 gears are MUCH tougher than the 32 pitch ever thought about being. If I were Transferring this much power through 32 pitch ones, they would be showing alot of wear by now.

With the way this AXI 2826/10 motor is behaving, I feel like maybe I could have went with the 8 turn motor. This 10 turn is 920kv. The 8 turn is 1130kv. We aren't lacking at all in the torque department.

This setup is very efficient. I got close to 30 minutes runtime from 6S 4000mah. :yes:

I can't wait for the 2 speed Transmission kit. :yes:

Hi Serum,

Why do I get the impression you don't think the 6S will work with the Quark Monster Pro?

What has been your experience?

This setup on 6S doesn't cog. I seen it being a little jerky from a standing stop at the very start of the run. It wasn't bad at all though, and went away in the first minute or two of the run.

Most people seem to find that the 125b does not like a fully charged 6s pack. Once the voltage comes down a little the quark seems to be ok. Since your setup is obviously not drawing a ton of amps, you are most likely not overtaxing the 125b. I havea feeling that the quark is somewhat sensitive to gearing when running on 6s. Too much load and it will most likely have issues, as many have found.

Nice to hear that it is working well for you. If I put the 2826/12 in mine it should run great. Lower kv will load the esc even less, I may be able to get away with a quark 80, instead of the 125b.

Not to hijack your thread, but I just ordered another 125b and a savage ss kit. I also ordered the brushless savage chassis from mike! I may try an out runner in this, as it looks to have some more room, and mech brakes too! alo bought a pair of trakpower gold lipos, a greatplane 60hv esc with prog card, 3 more ccbec, and a sv27 6 pole boat motor to test out. It was an expensive morning! (not really as I have worked a trade with the lhs owner for most of the stuff I got)

Really like the out runner setup you did here sike, looks clean and I am sure that will run well. Are you going to stay with 6s, or step down when the 2 speed comes out? Or are you going for some insane speed!?!

No Worries on hijacking the thread. It's open house as far as I'm concerned. LOL

You're probably right on the 6S experiences/comments. In a setup that was overgeared and cogging. I think it would crash the ESC quickly if a person just kept stabbing the throttle, trying to make it work. Even when it's headed for a thermal shutdown, I feel like the thermistor takes a few seconds to react. If the heat is too drastic and the situation comes about too quick, damage occurs before the thermal shutdown happens.

On the topic of comparing kv ratings of motors. It seems to me it's a trade off. The lower the kv, the higher the torque. But by going to a higher kv, you take some of that torque for rpm making ability. This applies to inrunners and outrunners alike.

More toys huh? :yes: Yes, The Quark 80b may work with this just fine. NO temp issues at all with the 125 amp ESC.

I really like what the BEC does to a system. What brand are the ones you got?

The SV27 motor is a screaming, by just looking at the Video's. :surprised: It's putting out some Omph!

I have a Traxxas Villain EX on the way. Got a good deal on a used one. I've been toying around with the idea of putting 2 - AXI 2820/8's in it. They are 1500kv with a 5mm shaft. Upsize the motor pinions and put it on Dual 70amp ESC's. Then I can play around with the Prop pitch and sizing to take advantage of all that torque. Should make for some neat water cooling modifications also. :yes:

On this E maxx setup, I'm going to see how the motor reacts to pulling that taller 2nd gear when I get the 2 speed installed. I'm sure it will do well. I will get some video's after I get the transmission upgraded.

Metalman said this motor looks small. You're not gonna believe how well it pushes this truck. :yes:

On 6S, I'm a little concerned about the Center Drive shafts being tough enough.

Hi guys,

I'm new here, I come from Germany so don't be suprised about my bad English.

I want to convert my E-Maxx to brushless. The SetUp I thougt about is this:

- Kontronik Jazz 55-10-32
- Axi 2826/12
- 8s1p FePo4

My Question:

Do you think it will work or is the motor too powerful for the ESC? I think I would gear it 40/22 for the beginning and if the ESC is not getting too warm I will go up to 40/25.
Will the motor get along with the 8s FePo or is this too much for him?
What do you think about the runtime?

Hi Xpy,

I think the motor and the ESC are made for each other. Be sure to put the cooling fan on the motor though. It does make alot of difference in motor temps.

8S FePo? I have ran 6S Lipo on the 2826/10 motor with 22/40 gearing. 8S might just be ok with the 2826/12. Run it for a little bit, then check your temps to make sure they are cool enough for your liking.

Runtime? What is the Mah capacity of your battery setup?

Well, FePO4 is short for LiFePO4, that means his batteries are 2300mah, because LiFePO4 is A123, IIRC.

wow if its pushes the emaxx around at that low of temps, how would it fair in a truggy on 5s geared for 40? what do these motors go for compared to nue motors?

They vary, but you are looking at about $40 for a cheaper outrunner the correct size, or upto $80-100 for a more expensive brand. Still alot cheaper than the inrunners we would be using...

i just looked at the specs and that thing it smaller than an L can feagio only 2.1" long and 1.4" diameter ............i didnt realize it was that small.

what are you refering to as the proper size?

Well, there a couple routes you can take with an outrunner setup:

outrunner in place of a normal motor, so they tend to be smaller and higher kv.

outrunner used in place of the tranny, or inplace of the spur & pinion- direct drive more or less, so they tend to be a bit larger and slower.

Hence the slight price difference between the different sizes and cheaper vs brand name motors. I've toyed with the idea myself abit, but i'll let a few more pioneers have fun first before I do any serious thinking.

Of course i would put a cooling fan on the motor.
I think the runtime should be at about 18 min. Do you think this could be possible?

18 minutes with half-decent batteries is easily possible, the lower amp draw of the motor will help increase runtime for certain I would wager.

Hi guys,

does somebody of you know where I can get the AXI 2826/12 in Europe for a reasonable price?

I would say start looking for plane and heli websites. If not, there are some very similar motors on BRC HOBBIES. Not quite as slow as the 2826/12, but close...

Hi all- this looks like lots of fun, but I don't know if the MM is a good controller for the Axi-type motors? Can anyone offer an answer please? Thanks a lot.
Kind regards
David

It'll run outrunners just fine with the updated software/firmware, you are just limited to 4s lipo, so really low kv motors & high voltage setups require a different esc with better specs; ampdraw will fine.

Bewdy - thanks for the reply suicideneil!

Hi,

I#m more and more thinking about the Sony Cells with the AXI for my Maxx.
Do you think the motor will get along with 29,6V of 8s1p?
And are the Cells load too heavy with the 2826/12 or will they do it?

I would get the Cells for about 6-7€ here in Germany. DO you think this price is OK or should I order the Cells in Amerca?

stupid question,but when you guys talk about sony cells,what exactly are you talking about?
Thanks,
Kevin

Hi xpy,

As far as 8S1P goes, that's the same weight as 4S2P. It's not too heavy at all. The amp draw should be within the cells ability also.

This type of cell is about $6 bucks each here in the US. However, the exchange rate works out. LOL Shipping to there from here would be expensive though.

Hi Kevin,

I believe they are talking about this cell. These are the same dimensions as the A123 cells.

http://i160.photobucket.com/albums/t...m/DSC06821.jpg

What cells are those?

Hi BL,

Please refer to this thread for more info. :yes:

http://www.rc-monster.com/forum/showthread.php?t=10178

Hey sike I need your help. Can you answer this for me- http://www.rc-monster.com/forum/showthread.php?t=13148

Thread replied. :yes:

Sorry I couldn't be much help.

Atleast you tried. Well I ordered the motors anyways. Im hoping for the best!