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Dramatic fall from the sky

Posted by Mick on July 22, 2013 at 5:03pm

Greetings,  this has happened twice:  perfect flight, 6 or 7 minutes in, climb to about 60 feet, suddenly motors dead stop, power gone, drop from the sky with no response from the TX. Hit the ground with heavy damage. In both cases, a couple of strange beeps from my TX preceeded the loss of power. Checked all power connections, seemed fine... all engines failed. Attached is the log for the last flight. (no wireless telem, I am aware there was no gps lock on this flight, copter was 150 ft away from me).

 

Thanks for any thoughts...

 

APM 2.9

Hexa

2013-07-14 13-26 120.log

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Tags: failure, loss, power, total
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Replies

  • R. D. Starwalt July 22, 2013 at 8:01pm

    Look under the logs subdirectory of Mission Planner. On my machine it is Program Files --> APM Planner -->logs. If the tlog has 0k in it, there is no data. Pick the one with the date of the incident.

    Your Throttle Input looks very odd...(from the log above)

    3692780900?profile=originalThe throttle input (from the RX to the APM) should be more continuous.. like the section in the middle of the image.

    This is image would be right if you throttled up, then off, then up, then off...etc as the spikes indicate.

    When did you last calibrate the APM with your TX?

    -=Doug

  • R. D. Starwalt July 22, 2013 at 7:43pm

    So sorry to hear this. Could you check for  a *tlog of this event? They are made regardless of having the telemetry radios.

    HERE is how to fetch them.

    -=Doug

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