Well, horizon cant find the esc I sent back. Good thing I sent it delivery confimation. I was told to expect a replacement thats being shipped today. Im going to sell it real cheap. on the other hand I just tried a castle creations 35a esc last night and accually had the same type of issues. Depending on the battery used it would give full power and then start pulsing real fast. Like a current limiter. PLUGGED THE 40A JETI BACK IN AND HAD NO ISSUES WITH ANY BATTERY. Damn capslock! So I called CC and they said its a battery current issue and it cant keep up with the esc and motor. They also said that the jeti has more resitance than thier controller and thats why it does that. My TP 1320 3s works great at full power for about 30 sec then pulses, reduce to power and wait, full power comes back. That battery says it can handle 17amp con and 27a burst. CC also said that would go away with the 2100 Tp Im waiting to arrive. ive posted the 35a CC for sale in the ads. Any Idea on how many amps the motor and 13inch prop pull? i read 13 in RC Flyer mag and someone posted here it was about 17a. Im goin to look for another esc and continue to fly.