Discussions

I had a crash a while back from high alt in auto mode, it flipped and was tumbling, and looked like one prop was stopped/freewheeling. I put it into stablize on the way down but it never recovered. That was just after starting out though, so I just wrote it off as some unknown teething trouble and moved on.

Second flip crash last week when I was doing maximum lift testing with my quad, it flipped from two meters, I figured I'd gone too far with the weight and tripped the self-presevation logic in one of the ESCs. They all seemed to work afterward, but one had a slight burning smell so I replaced it. I'm not too worried about that crash though, as I was pushing it.

But today's crash has really shaken my confidence, I was flying around a little aggressively as I wanted to log the current draw during these types of maneuvers, but at the time it flipped it wasn't working very hard at all. One motor just seemed to stop and it tumbled from an alt of a few meters, breaking an arm.

I've attached logs from today's crash (with current and motor logging). I had a look through, max current draw was a couple of spikes up to 53 and 55 amps, but mostly much lower, and low right before the moment of death. All motors/ESCs functioned after the crash, and nothing was even warm let alone hot.

Any advice would be much appreciated, the only thing I'm thinking of is replacing all of my ESCs with higher load+quality ones. Currently I'm using the stock 20amp ones that come with the 3DR Quad C kit, though #4 was replaced with a jrdrones replacement after the second crash last week, it looks the same though. I'm spinning 11x4.7 APC props on 880 kv motors.

BTW, is there any way of having the current logged more frequently? Seems incredibly sparse by default.

2013-02-09 10-44 5 - crash.kmz

2013-02-09 10-44 5.log

2013-02-09 10-44 5.log.gpx