motor choice

[foggha]

Quick question for my electric longboard.

Should I use the
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=18128
Turnigy Aerodrive SK3 - 6364-245kv Brushless Outrunner Motor
or
http://www.hobbyking.com/hobbyking/store/__18175__turnigy_aerodrive_sk3_5055_280kv_brushless_outrunner_motor.html
Turnigy Aerodrive SK3 - 5055-280kv Brushless Outrunner Motor

with my setup, which is a 6s 5000mAh 20c battery and a 120A esc ?

thanks

 

[Rolling_Friction]

I personally place more premium on the torque of motors. Maybe a more experienced user can chime in but i think 280kv motor might not hit its optimal performance with 6s lipos.

 

[CoolRextreme]

I wouldn't call me terribly experience but...

For my first build, I used that very motor in a 6S build, with a gearing ratio of 14/40

Dont get me wrong, it works plenty well; boosting me up to 19mph with topped off batteries, and an average speed of around 16mph.
Quite enough for cruising.\

However, I noticed that the overall power is on the weaker side. I weigh about 145-150, and I am able to go up about 10% slopes. However this is an audible 'chugging' sound, its obvious that the motor is really working.
A quick touch of the motor after such a climb would reveal that the motor is quite hot.

In my current build, I am upgrading to a dual-motor setup. I will be using two 230kv 6355 motors.

I will certainly be testing one of these motors on the board alone and see how the 6355 230kv stands up to the 280kv 5055.


Anyway, to sum my experience up. I think the 280kv 5055 motor is scraping the bottom. If I where to do it over, I would have bought a 230kv motor, or a 280kv motor with a larger motor body
The numbers 6355 state the motors size; 63mm wide, 55mm long. Same with the numbers 5055.

Again I would get a larger motor for more overall power.

So DONT get that motor. Shoot for a lower kv rating, or a larger motor.

I would recommend this one:
http://diyelectricskateboard.com/product/electric-skateboard-motor-6374-230kv/

Purely from looking at the stats. 230kv is plenty of speed, and a 6374 motor size is much bigger then a 5055, and presumably much more powerful! (almost double the watt output too)

Hope that helps!
-C.R

 

[WeeChumlee]

Hi there
Honestly mate, do yourself a favour and go with the bigger motor.
If you are a very small bloke the smaller motor will work, no doubt of that - but only to a point.
It will not do steep hills and will get very hot on longer mellow hills.
For a light campus board on flats alright, but for everyday use definitely go with a 63mm motor.
Good luck with the build.

 

[Hummina Shadeeba]

If u want a gem

http://www.scorpionsystem.com/catalog/aeroplane/motors_1/sii-40/SII-4035-330/

Power of a 63 in a 53 can
Why no one gets these..must be the price.

 

[s28400]

Check out APS Motors. I'm using their 6355 motor and it works great. http://alienpowersystem.com/product-category/brushless-motors/63mm/ They have a 190kv and a 230kv.

 

[nitrag]

...i think 280kv motor might not hit its optimal performance with 6s lipos

How does one determine this?

 

[Hummina Shadeeba]

Optimal performance: big enough, right gear ratio and kv so ur riding most often at the higher Rpms. I would just figure what top speed u want to do, find the kv and volt combo that will get u there, and get a single 63 or (2) 50s....or the single 50 scorpion