Quote:
Originally Posted by Pedebeater
I was inspired to do something like this by a friend who has an outrunner warhead (Takedown). He helped me out a lot with picking out the right motors. If I did this I would be using it as a direct drive setup. So I would not have to use the center tranny. Using outrunners can have many advantages. Such as loads of torque while still having amazing top end speed, efficiency, and less heat.
Here they are!
http://www.hobbycity.com/hobbycity/s...idProduct=4658
http://www.hobbycity.com/hobbycity/s...idProduct=4912
I would also like to know more information on outrunners in general. Like should I be basing my decision mainly on length or width?
I have not seen this done to a e-savage yet and would love to do something new. So please let me know what you think. |
IMO, both of those outrunners are too small to go Direct Drive with.
Gotta keep in mind the size of the load that you're asking this to start up under. Weight of the truck and the gearing + tire size you're going to use.
What gear ratio does your Savage use? Tire Size? Vehicle Weight?
As a general rule of thumb, here's how the power output of outrunner vary..
Higher kv = lower torque
Lower kv = higher torque
Large stator diameter = lower kv + higher torque
Longer stator length = lower kv + higher torque
If you go too high with the kv, you will have startup cogging and over heating. I would suggest somewhere between 400kv and 700kv for Direct Drive.
It's a balancing act to choose the right motor for the application.
Choose something with at least a 40mm stator diameter and at least a 20mm stator length.
Neo magnets make more power also.