Arducopter kept yaw-ing and crashed

Posted by Kristiyan Kostadinov on April 26, 2015 at 11:09am

hey guys, anyone here that could help me understand why the copter kept yaw-ing and yaw-ing for 5mins

until the wind pushed it and started spiraling and ended in a power line pole ?


(lost all connection, no taranis, no telemetry, nothing)

APM 2.6 running on X8 configuration 


here is the log

https://www.dropbox.com/s/3p2ndc…/2015-04-24%2017-42-02.log…

any help would be appreciated.

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Replies

  • DG April 26, 2015 at 1:44pm

    I'd say your battery is fried, and started out low V assuming it is a 4s. Toward the end there's the classic ThrOut spike struggling to keep it at altitude, then the death spiral.

    ouQXtnb.png

    It likely caused the GPS glitch, but by that time there wasn't enough battery to power the copter anyway.

    • Euan Ramsay > DG April 27, 2015 at 10:21am

      This was my thought - low voltage combined with oversized props under high load, the motors are struggling to keep up with the commands of the APM. The APM then tries polling the motors at the normal hz, but the motors are simply not responding. This happens on all 3 axis.

    • Kristiyan Kostadinov > DG April 26, 2015 at 11:38pm

      i yaw-ed about 30 in the graph, but the copter continued to rotate on itself, so the rest till 50 is spiraling and spiraling 

  • Kristiyan Kostadinov April 26, 2015 at 1:39pm

    oh well, I am replacing the APM with pixhawk now yes , but was wondering what went wrong

    thanks a lot

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