What do you think of these HUGE rc brushless motors?

[socalfusions]

I've been searching for the largest Rc brushless motors available and so far these are what I've found. Let me know what you think!

Turnigy 80-100-A 180Kv Brushless Outrunner
http://www.hobbyking.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=5139

This is by far the most common of the larger rc brushless motors I've seen being used in e bike and other related applications. It also appears to be one of the best deals as well.


Turnigy CA120-70 Brushless Outrunner
http://www.hobbyking.com/hobbyking/...y_CA120_70_Brushless_Outrunner_100cc_eq_.html

Here's an even larger Turnigy, although It is almost 5 times the price of the Turnigy 80-100!


Predator 30-8 Brushless Outrunner
http://www.icare-rc.com/plettenberg_predator.html

The Preadtor motor seems to be a bit stronger than the Turnigy ca120-70 while the price, iirc, is about the same.

Hacker A200-8 Brushless Outrunner
http://www.aero-model.com/Hacker-Brushless-A200-8.aspx

This is the most powerful rc brushless motor I've found so far, it seems incredibly powerful for its weight. It is also double the price of the previous two motors.



What do you all think of the performance of these rc brushless motors for ebike/scooter/motorcycle applications? Although I've seen the Turnigy 80-100 in quite a few ebike setups I have rarely seen the last 3 motors in any such setup.

 

[Miles]

This is the most powerful rc brushless motor I've found so far, it seems incredibly powerful for its weight. It is also double the price of the previous two motors.

Is this a fair way to compare?

Hacker

Weight 2.585 kg

Kv 110 rpm/V

Kt 0.0868 Nm/A (9.55 / 110)

Rm 0.015 ohms

Km: 0.0868 / SqRt 0.015 = 0.71

Divide by weight: 0.71 / 2.585 = 0.27



Just to head this one off
http://www.control.com/thread/1026217558

 

[E-racer]

You should type keywords into the search query. This forum has explored and tested these motors to the limits. We've rewound them, added sensors, run them at 100volts, people have made made custom hot rod circuitry to advance the timing. For 7kw +/-3kw these are the motors to experiment with.

 

[Arlo1]

So far the 5-8 kw motors are drivable with cheep controllers but motors above need more expensive controllers.