Big 12 pole outrunner setup in emaxx LOOK!

[rootar]

Has anyone seen this i was browsing ebay and this caught my attenion, http://cgi.ebay.com/New-E-maxx-Brush...QQcmdZViewItem

looks pretty cool to me with the shaft as the trannys input shaft, runs on 3-6s lipos, i dunno what to make of the no slipper i guess it can be good as he says and could also have its down falls. I think the way the motor sits would be PERFECT in a G-maxx way down low and back like that, you could run it on two 2s 5000mah pack in a series for 14.8v that would be a nice setup.

what do yall think of it? or have yall already seen it and im the only one catching it late?

[BP-Revo]

If you look at the eBay seller ID, it appears to be one of our very own forum members.

[MetalMan]

Just a bit late

http://www.rc-monster.com/forum/showthread.php?t=8921

[sikeston34m]

[lincpimp]

Yes, it was Sike that gave me the idea of the direct to diff outrunner setup that ended up in the redcat chassis I had laying around (during the time of the temp forum) I saw his outrunner setup on ebay, and then posted about here, before I joined (I lurked around for 6 months or so). It seemed to be a different approach, so I gave it a try. Nice to see that we have a few people, sike, metalman, others, that have tried the direct to diff outrunner with success. Sike is trying an axi outrunner in a more conventional way in a new emaxx, and making use of the tranny and slipper. It should be very interesting to see how the combo of an outrunner with a slipper and 2 speed tranny will compete with an inrunner setup.

It appears that the general method for improving brushless performance has been higher voltage coupled with slower turning motors that produce more torque than rpm, and then gearing to achieve the desired speed. We are just taking that one step further with the outrunner and its higher torque level.

I still run plenty of inrunner setups, and am trying out 8s+ lipo with lower kv inrunners. Seems like the cheaper, lower kv motors on higher voltage work better, possibly the higher voltage helps to mask their desigh flaws? However my quest for the "perfect $100 brushless motor" (wishful thinking?!)has lead me to outrunners. They are not as flexible in terms of rpm, but when geared and powered correctly, they seem to be as capable as an inrunner.

I have tried the so called hybrid outrunner (align 600 series) and do think that these will be viable alternatives for powering larger (1/8) vehicles. They spin faster than a traditional outrunner, but still produce more torque than a comparable outrunner. Only issue is their relatively slow spool up. Std outrunners (especially in direct to diff applications) mask the slower spool time by virtue of lower gearing.

I personally think that the varied experimentation with different motor types will benifit us all, as not every motor will work in every application. It is always good to have variety!

[rootar]

dammit i didnt even think to look at the seller ID. ( doh! )

so it wouldn't work that well on 12 cells 3300 (sanyo nimh packs) my frined bryan wants to make his emaxx brushless like my LS10, told him to stay away from the HV-maxx and we have been looking for a good setup he could run his two 6 cell packs or two new 6 cell packs, he isnt ready for lipo batteries he just like to charge them throw them in there and go play.

[sikeston34m]

It will work pretty good on 12 cells, but it would do even better on 14 cells.

If your friend is interested in this setup, tell him to pick up a couple of 7 cell packs to run.

Let me know if you guys have any questions.

Thanks.

It's very interesting like setup, but how the tranny hold up without slipper???
Just a question for you, how have you did to wet lube the tranny and keep the oil in??? There have no seal on the tranny halve and on the output shaft.

[Patrick]

You only need a little bit of grease in the e-maxx tranny, no problem with leakage. I've heard of people running them dry as well.

Yes i use grease too in my revo trany, but in his E bay post, he tell that he use Lucas oil treatment, and this thing is like oil, so i suppose taht he have make speciale seal on the tranny halve case and on the bearing output shaft to keep oil in

[Patrick]

Originally Posted by david lamontagn

Yes i use grease too in my revo trany, but in his E bay post, he tell that he use Lucas oil treatment, and this thing is like oil, so i suppose taht he have make speciale seal on the tranny halve case and on the bearing output shaft to keep oil in

Oh, ok. I'm not sure then.

[lincpimp]

He uses sealed bearings to keep the oil stabilizer in. That stuff is thick, like gear oil, so the sealed bearings should keep it in.

No sure, because between the bearing and housing, it's not 100% oilproof. And for the two tranny case halve, this stuff can leak there too.

[ilpufxit]

I"ve been running this unit in my E-maxx since June. Not a lot of miles on it yet but so far so good. I'm running 4s lipo 6000mah, it flies. I like having the 2 speed trans, its driveable for track/jumping in 1st and speed runs in 2nd. No problems with the oil staying inside, only minor seepage. Not running dry is very important imo. I've ripped out 2 rear driveshafts, but no trans problems. Two thumbs up on this unit if you can still get one.

[sikeston34m]

Metal shielded bearings are used on all the internal locations, while on the external locations, rubber shielded bearings are used. 1 on the input shaft (motor side), and one on each end of the output shaft.

On final assembly, I dab just a small bead of silicone on the mating halves of the transmission.

How well does it hold up?

On 4S Lipo, it holds up very well.

On 6S Lipo, it surpasses 50mph in a light weight E maxx. The weak link on 6S seems to be the output gears. It will eventually rip the teeth from the output gears from accelerating so hard.

It's pretty hard to control on 6S though. 4S is my preferred setup.