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View Full Version : Hacker Master 77-O full throttle cut out


Walt Thyng
09-04-2005, 12:48 PM
Yesterday I flew my new Sea Fury (Furias) and the motor would cut out whenever I went to full throtle. Even at start-up so I don't think it was thermal overload. Just to be safe I have moved the Hacker Master 77-O Flight CE (8-32 N ixx, 3-10 Lipos, 7-42 volts) to an area with higher airflow. The motor is an Axi 4130-20 on an 8S2P TP 4200 mah pack, props were APCe 14/10 and 14/12. Temp was high 70's.

The dilemma is that I flew the same motor, esc and 14/12 prop on a 9S2P pack previously and there were no problems. I have double and triple checked the brake settting (off) the timing (advanced) and frequency (high) of the esc.

I've misplaced the manual so I don't know if the esc has a low voltage protection for the LiPos and the last time I checked the Hacker site they didn't list the Master series anymore. Since it is made by Jeti would it be the same as their 77 opto?
TIA
Walt

Walt Thyng
09-05-2005, 07:59 PM
don't know what site I was looking at, but went I went back to Hacker USA I found the Master series. Still doesn't answer my question about low voltage cut out.

Would going to a 3P set up make a difference?
Walt

Mike Parsons
09-06-2005, 06:15 PM
Walt,
Have you put a Wattmeter on it? I would be interested in the amps as well as the voltage drop at full.

Walt Thyng
09-06-2005, 08:49 PM
Mike,
amp draw wit the (S2P pack was 41, with the 8S2P 38 on the 14/12. It dropped to 36 amps with the 14/10. I didn't do a fullvoltage drop check, but I do recall a three volt drop from a partial charge.
TIA
Walt

Mike Parsons
09-06-2005, 09:01 PM
Amps are within range. 3 volt drop? That seems a bit excessive. I couldnt find anything about checking the low voltage besides checking it with the programming box. Even if it was set high, that would be 3.2 volts per cell or 25.5 volts for the pack. Should still be plenty of headroom even at partial charge. I assume it does it even with a fully charged pack?