I believe I received a defective motor from 3DR.
I ordered the Quad kit, full electronics, with the 850kv motors.
When I apply throttle, all of the motors start up (no props!), but one of the motors sounds like it is "sputtering". Within 10 seconds or so, that motor cuts out. If I return the throttle back to zero and try again, the bad motor will restart, but it quickly cuts out again.
Things I have tried with no improvement:
* swapped ESCs
* swapped the order of the 3 motor wires
* hooked the ESC directly to receiver channel 3
Anything else to try? Otherwise I'd like to know how to get a replacement.