1. If you would like to get rid of these banners and the ads within the posts, all you have to do is sign up and they will go away!
  2. Welcome to Rc-Help, are you here looking for the PDF Plans? They are located in the store in the tab above, but you must be signed in to access that part of the site. It only takes a second to sign up!
  3. Like Us On Facebook!
    Hello Guest, it occurred to us during that last server failure that we had no way of informing the members of the site of the failure and I would like to invite you to like us on facebook so that you can get updates if the site happens to go down again. We don't post much over there unless we are updating the members so we will not flood your feed like some places do. Just click on Like and then allow notifications and that's it. See you there soon!

    Click Here To Rc-Help's Facebook page!
    Dismiss Notice
Dismiss Notice
Hey Guest, I see you are not signed up on our forum yet. Did you know Registration is FREE and is only a couple clicks away? You can even sign in from Facebook, Twitter or Google+ for your convenience! So what are you waiting for, CLICK HERE to join in on the conversation!

Kv Rating Explained, And How To Figure Out Headspeed

By Tony, Jun 29, 2011 | |
  1. Tony
    What's up everyone. Well, I have been asked time and time again what the KV means on the side of a motor. Well, this video will explain it really quickly. It's a simple equasion that you can use to figure out your head speed as well.

    Pretty much, if you have a 3500kv motor, then that means it will turn 3500 rpm if only 1 volt was applied and it was running at 100% efficency. Lets face it though, nothing runs at 100% efficency, so in these, we are using 80% to be safe. If you want, you can use 90%. Below is the equasion.


    Confused yet, don't be.

    kv= the kv rating of your motor
    v= the voltage of your battery
    m= main gear teeth
    p= pinion teeth

    If you use this equasion, you can figure out what kv motor you need for the perfect head speed, and with what pinion without ever buying a motor before hand.

    Share This Article


To make a comment simply sign up and become a member!