Trouble shooting a crash, but not sure what I'm looking at

[jlrogers2 (Joseph Rogers)]

I’m hoping that someone might have the time and be willing to take a look at the attached log file.

I have to admit that I have no idea as to what I’m looking at, but I believe that motor #3 either lost power or couldn’t keep up with the other three. The flight seemed to start just fine, but at around :29 when I pushed the throttle up a bit the craft seemed to dip forward and to the left until it found it’s way into some tomato cages, which make GREAT quad catchers

I’ve posted the log file below and here’s a link to the VERY brief flight itself: VIDE1610 - YouTube

BTW - I’m using the current Jessie image listed in the DOCs. This build has had many previous and uneventful flights. What made this flight different, aside from the crash, was that I switched the motors from tmotor MN3515-15 400kv to tmotor MN3520-11 400kv.

00000017.BIN (236.0 KB)

[aleksandr.zheleznov]

You are right, you had some problem with motor 3 or ESC or propeller.
And I can see strange range of values RCOU

[jlrogers2 (Joseph Rogers)]

@aleksandr.zheleznov Thanks for taking a look at that. I’ve been thinking that it’s about time for an update to the ESC’s anyway seeing as they’re Afro 30a 6s esc’s running SimonK from a few years ago.

I have to apologize, but again I have zero experience in reviewing the log files so I’m uncertain as to what RCOU is or what a strange range of values might suggest. Any insight would be much appreciated

[aleksandr.zheleznov]

For a start you may read this doc.