jfro
Aerial Fun
I made some additions to my new 8x.
Had a issue which I sure was my mistake, but want to check for opinions if I made 1, 2, or 3 bad decisions.
Flying by myself so no one was at risk and luckily X8r was not wrecked.
3:30 into my 2nd flight with full load, I lost power and copter came straight down. Lucky I was only about 6-8 feet hoovering.
Power loss took about 2-4 seconds. Came down on all 4 legs. Lucky.
8x Arvroto's 2514 on 4 arms with 11 x 4.7 props. HFP, no gps.
Plush 30am ESC
Gimble has 2 brushless motors.
2 5000 mAh batteries.
Rig is 11.4lbs with everything.
14.8v on main line which I knock down to 11.1v (mimic a 3s) for the gimble motors.
4s's are thus running 8 Avroto's and 2 brushless motors.
First flights today with 2 batteries, gimble, & gh1 camera added to my x8. Had to use more throttle with the added 3.3 lbs (previously was around 7.25 lbs).
Well after a couple short flights of 1 minute each, I came in & charged 2 more batteries while tweaking gimble settings, (5000 mAh 30-40C 4s Gen Ace).
Came back out with freshly charged batteries and around the 3:21 mark of mainly flying & hoovering in the back yard (6-10 ft up), boom, power off. Down comes copter. Lands flat on all 4 legs.... Lucky.
First checked batteries, their temps were not bad.
Grabbed a cable from my left side battery and it was very hot.
I then saw a burned up connection. The hot (red) side of the EC5 blue connector between my copter harness and Y cable gong to the batteries was melted.
Both the hot (Red) 8 awg wires (base of Y cable and input from copter harness) had released from their solder joints and the blue plastic connector was about 40-50% melted away. The gold m/f hot connector is fused together probably from a little left over solder.
I'm pretty sure the female side of my Y connector is where I mistakenly soldered in the wrong end of the female connector. I reheated it & blew out the solder and then soldered the correct end.
Sanded a little of the inside and checked the fit which seemed fine with the male plug on my copter harness.
I'm guessing that was a mistake.
So, I have 3 questions.
1. EC5's * 8 awg stranded silicone wire ok?
2. I'm guessing the joint got seriously hot from me trying to clean the solder out of the female plug on the EC5. Hot enough so the two soldered ends on the red (hot) cable released from the male/female gold plug.
Is this possible/feasible that some excess solder inside the m/f joint got so hot it melted the EC5 plastic housing on the hot side?
I had flown with one battery for about 10-15 3-4 minute flights previously with 1 battery without issue, but wasn't using the Y Parallel cable where the bad female connector was.
3. Today, 2 batteries in parallel instead of 1, new Y cable ( with probable bad EC5 female connector.... my error), 3 - 3.5 more lbs on copter, and 2 more motors (on gimble). Besides bad female connector, am I asking two much of the 4S 30C -40C batteries and 8awg cabling/EC5 connectors with the 8 Avroto's & 2 added gimble motors?
Had a issue which I sure was my mistake, but want to check for opinions if I made 1, 2, or 3 bad decisions.
Flying by myself so no one was at risk and luckily X8r was not wrecked.
3:30 into my 2nd flight with full load, I lost power and copter came straight down. Lucky I was only about 6-8 feet hoovering.
Power loss took about 2-4 seconds. Came down on all 4 legs. Lucky.
8x Arvroto's 2514 on 4 arms with 11 x 4.7 props. HFP, no gps.
Plush 30am ESC
Gimble has 2 brushless motors.
2 5000 mAh batteries.
Rig is 11.4lbs with everything.
14.8v on main line which I knock down to 11.1v (mimic a 3s) for the gimble motors.
4s's are thus running 8 Avroto's and 2 brushless motors.
First flights today with 2 batteries, gimble, & gh1 camera added to my x8. Had to use more throttle with the added 3.3 lbs (previously was around 7.25 lbs).
Well after a couple short flights of 1 minute each, I came in & charged 2 more batteries while tweaking gimble settings, (5000 mAh 30-40C 4s Gen Ace).
Came back out with freshly charged batteries and around the 3:21 mark of mainly flying & hoovering in the back yard (6-10 ft up), boom, power off. Down comes copter. Lands flat on all 4 legs.... Lucky.
First checked batteries, their temps were not bad.
Grabbed a cable from my left side battery and it was very hot.
I then saw a burned up connection. The hot (red) side of the EC5 blue connector between my copter harness and Y cable gong to the batteries was melted.
Both the hot (Red) 8 awg wires (base of Y cable and input from copter harness) had released from their solder joints and the blue plastic connector was about 40-50% melted away. The gold m/f hot connector is fused together probably from a little left over solder.
I'm pretty sure the female side of my Y connector is where I mistakenly soldered in the wrong end of the female connector. I reheated it & blew out the solder and then soldered the correct end.
Sanded a little of the inside and checked the fit which seemed fine with the male plug on my copter harness.
I'm guessing that was a mistake.
So, I have 3 questions.
1. EC5's * 8 awg stranded silicone wire ok?
2. I'm guessing the joint got seriously hot from me trying to clean the solder out of the female plug on the EC5. Hot enough so the two soldered ends on the red (hot) cable released from the male/female gold plug.
Is this possible/feasible that some excess solder inside the m/f joint got so hot it melted the EC5 plastic housing on the hot side?
I had flown with one battery for about 10-15 3-4 minute flights previously with 1 battery without issue, but wasn't using the Y Parallel cable where the bad female connector was.
3. Today, 2 batteries in parallel instead of 1, new Y cable ( with probable bad EC5 female connector.... my error), 3 - 3.5 more lbs on copter, and 2 more motors (on gimble). Besides bad female connector, am I asking two much of the 4S 30C -40C batteries and 8awg cabling/EC5 connectors with the 8 Avroto's & 2 added gimble motors?