Direct to Diff Redcat Updates

[lincpimp]

Spurred on by Sikeston's revo and Metalman's MT2, I decided to break out the redcat that I modified for a direct to diff drive and update it with a new motor. I purchased an Axi 2826/12 and modified the shaft so that I could drive from both ends of the motor. Modded my mount slightly to fit the longer motor and added some electronics. The truck runs much better, stil some startup issues with small throttle inputs. I ran it on 5s 2500 18c lipos and it seems to top out around 40mph, with plenty of power. Heres a few pics:




Heres a link to the old thread in the remp forum: http://www.rc-monster.com/tempforum/...read.php?t=845

[sikeston34m]

That looks good. How does this one do compared to the old motor? Are temps in range after a good run?

If you want some "stone cold" motor temps, check this out.

http://www3.towerhobbies.com/cgi-bin...?&I=LXPRB0&P=7 Tower is famous for typos. I know it says "Plastic Construction", but the cooler for the 41xx series are metal.

You could lose some weight with a UBEC.

How warm does your Lipo get if you run it hard? I'm just wondering if it can keep up with the demand.

How did you mod the cvd's? This motor looks longer than the old one.

Here's some suggested settings for the Quark that I have found to work best with the outrunner setups:

"Inrunner" setting
Starting Power set to "High"
Lipoly "Manual" setting with custom cutoff voltage

It looks really good though. I think the AXI motors are sharp.

[lincpimp]

Much better performance than the old motor. The stator is longer, but the shaft is the same overall length as the old motor's shaft. I like the fan idea, am I correct in thinking it bolts to the can with the fins pointing away from the motor?

I do need to wire up a ubec and make a battery tray, did not have any deans micro connectors for the ubec so I used the rec pack instead. The quark and the lipo barely got warm. The lipo did not have any issues, and I got about 20mins out of it with some left in the pack.

I had the settings as you describe, save for having the cutoff set at Lipoly High. I need to change that as I like a 3.2v cutoff.

I need to experiment more with this setup, I would like to go with larger tires and maybe drop down to 4s as the truck is plenty fast with the current setup and taller tires will just make it faster. The redcat seems to be holding together ok, only the servo saver spring is too weak and causes alot of slop. I may just make it solid at the the bell crank and use a heavy duty servo mounted saver.

[lincpimp]

Scratch that, I see that the fan blades point inward toward the motor. Does it draw air through the motor like a squirrel cauge (a/c) fan or does it blow air through?

[sikeston34m]

Originally Posted by lincpimp

Scratch that, I see that the fan blades point inward toward the motor. Does it draw air through the motor like a squirrel cauge (a/c) fan or does it blow air through?

It draws air through the motor, and blows out at the fan. The mounting end is where cool air enters, the fan end is where warm air exits.

The 41xx version moves a good amount of air. I'm sure this one will too.

[sikeston34m]

Woo Hoo! The Mail Lady came today bearing gifts!


Hey! There's something there on the left that you could use Linc. (Notice: The little smiley is looking right at it! LOL)

[MetalMan]

The Redcat looks pretty good! (or at least what you have done to it does)

That motor you're using, I'm using pretty much the same motor but the KMS version in my rock crawler.

I noticed our motors are both oriented with the mounting end of the motor toward the rear of the trucks. Interesting .

That chassis looks a lot wider than the MT2 chassis I'm trying to work with. And I'm sure it helps that your motor is also quite a bit smaller in diameter (for trying to fit everything on the chassis).