Originally Posted by chriscap
Alright, I'm super confused. I called aero-model/hacker. I was told the a40-12s is a FOUR cell motor and not to run 5 cell on it. They said the a40-14s is the 5 cell setup. This is confusing the heck out of me because ADC and 3dhs say the 12S is recommended for a 5s setup. I was also told I should run a 15x8 prop on a a40-12s. Confusion.
Hacker spec and advise their motors for people who want to stay at full throttle the whole flight... this isn't how we usually set up 3D planes however. We're usually after a higher peak performance, and only ever at full throttle for short periods of time. If you want to fly at full throttle all the time, the advice from Hacker isn't bad advice.
But as the numbers go up, the Kv of the motor goes down... the 10S is a faster motor per volt than the 12S and both faster than the 14S. For the higher thrust we generally seek for 3D, the 10S is our 4S recommendation, and the 12S for 5S.
...the 14S will work fine, it will want 5S, and a larger prop. Or stay on the same prop and you can also fly at full throttle for the whole flight