ever heard about arc motors?

[florianz]

just recently a guy's castle-neu rotor exploded. and my losi would have exploded as well, if I didn't seal the rotor bonding which was getting loose due to sand. even the lehner's loosing segments... they all can fail. but when the arc's not bonded, that might be a problem. I can't forget that statment of the 75mm on 8s. surviving that, I think they're solid, but I think we wil find out

[brian015]

So has anyone tried one of these ARC motors out? I saw this advertisement which claims they now have "REDESIGNED ENDCAPS FEATURING RETAINING CLIPS TO PREVENT ENDCAP FAILURE FROM THE EXTREME FORCES THESE MOTORS GENERATE":

http://www.lightflightrc.com/

[brian015]

anyone?

[killajb]

I have one of these in my muggy. I haven't run it very much because of work has been picking up. I'll run it this weekend and give you more details, temps, gearing, etc.

[brian015]

Originally Posted by killajb

I have one of these in my muggy. I haven't run it very much because of work has been picking up. I'll run it this weekend and give you more details, temps, gearing, etc.

Thanks, any general impressions would be helpful.

[killajb]

Took my Muggy out bashing today. MMM 6s 4000 30C Zippys. I have the 36-75-1 ARC motor with a heatsink/fan combo on it from Hobby City, exactly like this:
http://cgi.ebay.com/540-Brushless-Mo...item255adc159c

Running 15-tooth pinion, 46-tooth spur. Don't think the fan is really necessary, but since I purchased 5 of them at one time, I put them on most of my 1/8 conversions as a precaution. They seem to lower temps an average of 20 degrees (F). Wheels are large (and relatively heavy) Hot Bodies wheels.

I ran in an open parking lot which is surrounded by steep, grassy hills that lead to adjacent parking lots. I consider this worst-case scenario as the vehicle is run in either wide-open throttle in the open parking lot, or being bogged down in tall grass (as tall as the wheels) going up steep hills.

Temps after 20 minutes of this were: Motor 153.5 F, Battery 121 F ESC 132 F

Motor has plenty of torque and throws the Muggy around nicely. Center diff fluid could be a little thicker as the front tires ballooned if I pegged the throttle. I could flip the truck on its lid from a standstill as well. Overall the motor seems a more powerful than my CC 2200, NEU 1515 2.5 D or my Hacker C50 11XL. Temps were lower in this setup than the CC 2200 and Hacker motor, but on par with the NEU 1515 2.5 D.

I covered the cooling holes with aluminum tape to prevent dirt from damaging the motor. Overall, for the price I'd consider this a good alternative for a larger 1/8 scale vehicle or monster truck. I didn't have many hard impacts, so I cannot verify if the end caps would pop off during a hard crash or not.

Hope this helps!

[brian015]

Originally Posted by killajb

Hope this helps!

Yes it does - good to hear from someone who has actually used it. Thanks for the data.

brian