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11-06-2014, 05:15 PM
| #1 |
| Pebble Pounder Join Date: Apr 2011 Location: Hood river
Posts: 118
|  KV rating?
Hi there, Confused on KV rating. I am getting a new motor for my Wraith and these are the same motor with different KV. I want more torque not speed. Which of these two motors should I get? Thanks!  21.5T Sensored |
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11-06-2014, 05:24 PM
| #2 |
| Suck it up!   Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: KV rating?
Lower kv typically means more torque as long as you are comparing apples to apples.
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11-06-2014, 05:28 PM
| #3 |
| Pebble Pounder Join Date: Apr 2011 Location: Hood river
Posts: 118
| Re: KV rating?
Thanks! Much appreciated....
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11-06-2014, 05:33 PM
| #4 |
| owner, Holmes Hobbies LLC  Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Re: KV rating?
The slower one has a larger rotor. 21.5t is pretty dang slow and weak. If you want torque a 13.5 on 3s is the sweet spot. Any faster and voltage drop in wires dominates, any slower and motor resistance prevents preak torque without running higher voltage. But if you don't want speed, 21.5 it is. Get the slower one. It will produce more torque since both are 21.5t. |
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11-07-2014, 12:29 AM
| #5 |
| RCC Addict  Join Date: Jan 2012 Location: Sweden
Posts: 1,809
| Re: KV rating?
As noticed these motors are the same armature with different rotors. They will produce the same power and give you the same torque and speed on the wheels given a gearing matching the difference in Kv. You'll probably need to run them on 3S to get a decent upper top speed. |
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11-10-2014, 01:12 AM
| #6 |
| Pebble Pounder Join Date: Sep 2014 Location: USA
Posts: 127
| Re: KV rating?
which brand motor do you use?
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11-14-2014, 10:00 AM
| #7 |
| Pebble Pounder Join Date: Apr 2011 Location: Hood river
Posts: 118
| Re: KV rating?
I had a sensored Tekin 17.5 turn but I put it in my Twin Hammer
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