ORIGINAL: pvt_pile
ORIGINAL: Slo-V Flyer
ORIGINAL: LiL Richy
But the for kv the faster, right?
You wanna say that again more clearly? ;D
I think what you're trying to say is the higher the Kv the faster the motor, and yes generally that is correct, since 5700 rpm per volt is faster than 4600 rpm per volt. But of course, that does not necessarily mean one is faster than the other when you plug in real world variables. the 4600 can be faster on 3S than a 6900 on 2S, if geared right.
Incidently, the 4600 on 11.1 would be 51060 rpm, exactly the same as 6900 at 7.4v. I'll let you guess which one will be faster and run longer.
Plus you have to consider can sizes, motor efficiency, max rpm ratings, etc... Interpreting Kv as the only measure of speed is not very useful. Its one of the major factors, but not everything.
Yeah I forgot to mention, the Kv rating + maximum amp draw is what you want to look at, along with efficiency. The first two will tell you what kind of torque your motor will produce, and the efficiency rating will tell you how much of that power will really be produced and how much will be turned into heat, so to speak.