ESC or Motor problem?

what current is it drawing and what voltage?

The recommended propellor (for 3S) is 8 x 4 or 7 x 5

Originally posted by Dratit I bought the H-KING 10A Fixed Wing Brushless Speed Controller to go with a Turnigy Aerodrive SK3 - 2122-1800kv Brushless Outrunner Motor but it seems to cut out when full throttle. Fairly new to hobby and still learning about the electronics. Any suggestions?

Hi Dratit,

One thing I did notice in the specification for this Brushless Speed Controller (allso known as ESC Electronic
Speed Controller) is that the bult-in BEC (Battery Eliminator Circuit)(the bec powers your receiver and servos) is only rated for 1 amp, 1 amp is ok for two small servos
that don't work to hard, using more than two servos or using larger servos you have a much grater chance of the receiver going
in to "Brown-out" this is very common, especially with older Spektrum receivers.
When the receiver has a brown-out the Electronic
Speed Controller gos into "fail-safe" and stops the motor from runing.

To test if this is your problem, see if your servos still work the moment the motor cuts out. If servos still work as the motor cuts out your have some outher problem.

In the ESC manual it said cut off voltage is 3volt per cell, you should notice the motor slowing down before it cuts out completely, so I don't think this you problem. Good luck.

Cheers
FDU

Coptor - this is from the review on the motor in question:

"...I also tested using a 3S setup and for thrust, the best (of the props I had) was a 5.7x3 which yielded 157 g of thrust @ 4A, 50W, 12.3V. Here's my numbers: V : prop : Watts : Amps : Thrust/..."
8x4 : 46W : 7A : 230 g 6.x :
7x6 : 54W : 7A : 215 g 6.0 :
6x5 : 41W : 6A : 153 g 12.25 :
5x5 : 70W : 5.6A : 75 g 12.3 :
5.7x3 : 50W : 4A : 157

7 Amps is well inside the limit

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=18148

Tx. I noticed that the motor pulsates at full throttle but all servos work when it's doing it. I tried another ESC that doesn't seem to have any markings on it (from my father-in-law) and it now goes full throttle but it seems the ESC warms up pretty quick.