After some parking lot/street testing I have found the KMS 2826-06 to be quite inadequate, even with an Axi fan mounted to the back. Under normal usage the motor would run about 170 deg. F and cog quite a lot. In the last (and final, for this motor) outing I noticed the truck seemed to be slowing down, and I knew the batteries were far from cutting off. It was almost like the motor was going "soft".
Maybe 15sec. later the motor decided enough was enough and put out quite a nice puff of white smoke. I continued to provoke it, and it rewarded me with some more smoke and even a light show from inside the motor! This was quite a sight and I felt compelled to continue feeding it so my co-workers would get a chance to witness this spectacular sight.
As you can imagine, that motor is done for. That is the last time I will purchase a KMS motor for an application where
some performance is desired (this same size/wind of motor works terrifically in my crawler). This has led me down an somewhat interesting path - the path of motor choices.
I was contemplating a typical inrunner (Medusa 36-50-xxxx) and a spur/pinion gear reduction with slipper clutch, and making the mounts to go with that, but was unable to come up with an adequate design which would allow minimum driveshaft angles (vertically and horizontally) as well as a more centered motor position.
Then I came back to the original plan of direct-drive-to-diff with an outrunner and set out to find a similar sized motor to the KMS 2826 but with more power and a reasonable price tag. The Scorpion motors seem like an excellent option:
http://www.innov8tivedesigns.com/pro...products_id=83
http://www.innov8tivedesigns.com/pro...roducts_id=391
If only their HK3026 came in a kv in the low 700s, then it would be
perfect.
That 3032 is not only longer than the 2826 I was using, but also larger in diameter. I think it should run much cooler due to the size and better quality. If you guys think this is a good option, or can point out something else, I would like to hear about it.
Whew, long post! Anybody who has read this far deserves a cookie!