All,
Here is my setup -
Synergy E5 with 14T Pinion running at 2300 RPM
Kontronik Jive 120 HV (V9) setup as Mode 1,4,9
Scorpion 4025HKIII-1100 KV Motor
TP 4400 6s Mah Battery Packs (45C and 65C) with approximately 20 cycles
6 Flights with mild 3D, mainly I was dialing in my Helicommand on these flights. No issues
Yesterday, I did 3 flights. Since I was happy with the setup of the Helicommand, I worked the heli a bit harder through the flight. About 2 minutes into the Flight (timer is set to 4 min), I get what I first thought was a radio hit (DX8), or a mechanical issue. I immediately hit TH hold, had power for servos (BEC) and auto the unit down. in fact, I lifted the heli back up very cautiously and it hovered fine (no disconnect of battery, just dusted it off and hovered). I immediately looked over the heli and looked at the Spektrum Satellites and they were both solid orange (no flashing…no radio issue). I have to admit that I did not look at the lights on the ESC, as I had the JLog installed.
I downloaded the flight data from my installed Jlog, and attached a picture. At 3 min 20s, the Voltage drops to 17.5 volts and the current spikes up around 250 amps., this was the cutout. Then I cut power and did an Auto. At first I thought that a cell on the battery dropped out, and then came back after I hit TH Hold. So after reviewing the Log I went back up and flew again, with a new battery pack. I took it pretty easy on this flight, and had no issues. I had one more battery pack and went up for a third flight (sadly I forgot to put the SD card back in Jlog...whoops) Anyways, I flew the heli more aggressively for about 3 minutes and again I have a motor cut out, but it comes right back and no issue. This time I land, and do not have to Auto Again I forgot to look at my ESC (my bad) So now I am scratching my head, and think that the original battery was not the issue.
Some thoughts.
The temperature outside was 34F and I have not installed the external heat sink on the controller, just figured at this temperature it was not required.
I have read some post where KSA mode is required, again, I have not set this mode. Also perhaps I could lower my LV Cutout on my ESC. Just a thought,
The gear mesh is silky smooth, so I do not think this is an issue.
I am running the 120 HV only because I had it new in box and just sitting around, I understand a bit overkill but it should do the job.
Any thoughts are welcome.
