Originally Posted by
birdDog
13x4 grabs a lot of air. You will like the throttle response. Just fitted a 14x4 to a 2820 870 motrolfly on 4s in my 48 Yak. 55 amps is right where Ken says should be my limit. .
Honestly I do not think a 13 x 4 is any problem with 4S on the motor or ESC. 41 amps. Less than a 12 x 6 @ 45 amps.