Originally Posted by jon.moab
I flew my son's Sabre today and have a question for you. About 30 seconds after take off, the motor pulses, as if it has detected low voltage. The battery was freshly balanced. I flew the plane 2 1/2 minutes and landed. The cells still have 3.8 volts in them. The motor continued to pulse every 30 or so seconds during the flight. I flew it on 4 different batteries and all did the same thing. Any ideas what causes this?
mine does that sometimes in a hard banking turn. it's like it loses signal for a split second, but recovers before it has any effect on flight surfaces. only throtlr is affected.
if you are in cold weather, that may cause it also.