outrunner for Revo on 4s ?
 

Hey all. i'm interested in giving an outrunner a shot. Are there any inexpensive outrunners with KV's close to 2k that will be heavy enough for a Revo ? I'm only running 4s, so I'm sure that limits my outrunner options immensely. I used the motor selector and determined I need a KV from 1800 - 2200 or therabouts. If it's a bit lower KV, I can always gear up a bit I suppose.

Any ideas ?

J.

A 2200kv is spinning too fast on 4s Lipo,it is good for a 2s Setup. In general, you shouldn't take cheapo outrunners above 15000rpm and the better ones (AXI....) above 20000rpm. So look for a 1000kv outrunner on 4s Lipo and use largest pinion and the smallest spur gear you can find. :yes:

any recommendations ? AXI ? Has anyone tried the GP rimfire outrunners in a conversion?

You could use an AXI 2826/10, sikeston34m is using it in his E-Maxx on 4s Lipo with success: http://www.rc-monster.com/forum/showthread.php?t=9493

+1 for the axi outrunners, for the price they are an excellent deal. I am very impressed with the construction quality. You should go with the 2826/10 it is a good motor for what you are looking to do. The 2826 is the stator diameter and length, the 10 is the number of turns. Longer stator-26- equals more torque in the smae diameter-28-. The 28 series have 5mm shafts and a 540 bolt battern, so they are a direct bolt in for a std motor mount.

sweet, thanks. You think I would be happy with it compared to say a Feigao 8-9xl ? I can run it on the MM or Quark 125b.

J.

On 5s lipo it will be good, the MM does not like outrunners, so the quark is your best bet.

http://www.horizonhobby.com/Products...dID=CYLCAR2000

This should work nicely. Just ask Sikston. He has my old one and loves it. I wish I never sold it to be honest. Great on 4 or 5s.

Man, that looks perfect with the KV and all. Price is a bit high for what i was thinking for this project though. I'd like to stay around or below 100.

I also notice it has a 3mm shaft. All my 32p and Mod1 pinions are 5mm.

Know of anything similar with a 5mm shaft ???

J.

The crazy thing about that motor is its based on a 5mm shaft and its turned down to 3mm where the pinion goes on it. I think they were aligning it to work with stock emaxx pinions.

I think like most outrunners its just a matter of losening a set screw that holds the shaft in place and replacing it with a 5mm shaft that isnt turned down on the pinion end. Should be easy to do if you can find a 5mm piece of rod and cut it to length. I could be wrong on that, but I think that is the case on most Outrunners.

hmm. i have 5mm shafts from a couple burnt up ammo's. I wonder if that would work ?

That may change by the end of today. Check for an update in 4-6 hours (if all goes well).

I've seen a few outrunners on MM controllers. Not personally, but on the forums and such.


Would something like this be much too small ??

http://www.hobbycity.com/hobbycity/s...idProduct=2128

And has anyone tried these hybrid's yet ? Looks interesting, and the price is very attractive...

http://www.hobbycity.com/hobbycity/s...idProduct=5422

J.

The gold outrunner is too small. When looking for a motor for your revo, keep the motor weight at least 8 ounces (224gm) IMO, if not 10 ounces.

I would like to see some of those UH hybrid outrunners in action. I tried both align 600l and xl on 5s and they worked well for me in my old emaxx. They are around 1600kv and work well with a quark controller.

I might just give it a shot. Heck, for $39, i'm not losing much if it doesn't work very well.

If it has anywhere near the performance of the align motor you will be happy. The spool up was slightly slower than an inrunner, but so much more torque. Very smooth power delivery as well. And it did not get hot at all. Hope the UH hybrids are as good as the align.

Hey Jhautz,

You just described exactly what I did to the very motor I got from you. LOL
http://i160.photobucket.com/albums/t...m/DSC06711.jpg

how about this?
http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=020

Does the shaft come out in all out runners? This cheep ebay one also looks like it has a bushing for the shaft on the mount side, is this normal?

I have found a few that the shaft doesn't come out of, such as certain models of the Century Brand Outrunners. It's a press fit PITA.

That's not a bushing that you're seeing, it's a spacer. This motor does have bearings. I've never found an outrunner that didn't have bearings.

They chose to go with a spacer and a snap ring instead of a lock ring collar.

The ebay emax motor is 180gm. Pay attention to the weight. 225gm or higher for an Emaxx.

not to hijack this tread but if the numbers are the same why is the weight not the same or close?

I cant tell you how many times in the last year I wished I didnt sell that thing.:grrrrrr:

Gimmie it back:slap:

lol

I didnt see anything in the revision history on the CC site.... What do you know? Is the fabled MM fix finally about to be released?

They got the C link done, the webmaster should upload it onto the site tomorrow.

Because sometimes a manufacturer will stretch the truth a bit. I have found the easiest way to rate an outrunner is with weight. Same for batteries. If the motor is too small, it will have to work a lot harder. If the motor is too small, it will also have trouble dissipating heat. I have that emax motor you linked to. It is about 6.5 ounces and not really all that powerful (for a revo). The air gap and stator laminations are huge too, so it isn't very efficient.

It would work, but you will either have so-so performance or the motor will burn up in short order.

Cool, thanks for the info :yes: