Crash APM 2.5

Hello

Big disappointment few days ago:
After about twenty flights with no problem at all, my hexa is now in a small box and a refuse bag.
here is what arrived:
For some time, I did not manage to have a height of stable flight in Loiter, nor alt hold.
On the other hand there stabilize, no problem. I had applied the procedure of regulation of the throttle mid and verified logs on several flights to try to correct this instability in height unsuccessfully.

Yesterday, I return to my club to continue my tests.
In the first flight, I had difficulty arming the APM. I had to disconnect reconnect 3 or 4 times batteries . Then, the flight it passed well, but in every passage it loiter or alt hold, always the same thing the héxa tried to rise. I ended my flight as most of the precedent in mode RTL with a composed unless a meter of the point of initialization.
I re-prepare the héxa for the second flight. This time, the APM arms itself straight off and I take off.
While I am still in approximately 10m of top, in stabilize, the hexa turn violently in roll, crosses 3/4 back and falls.

Here is my config:
APM 2.5 HK it firmware 3.1.2
power modulate 3DR
GPS UBLOX LEA-6H
sonar EZ-4
telemetry 3DR 433mhz
2 X 3300mAh 4S
receiving and satellite JETI 2.4 ghz
Transmitter JETI DC16

here is the log of my last flight...and a screen shoot of the last seconds

If somebody has an idea...
I verified the 3.3V regulator, it's OK...

Thank you

logs.rar

Screenshot - 02_03_2014 , 09_36_37.png

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Replies

  • When you connect via cli and then go to the logs, there are start and end byte values associated with each log. What is your highest end value? Are there any logs that will not download?
    • Yes, there is another logs on my APM : the first fly of the day that was OK.

      The limit values of my first fly are 1 and 2184.

      The limits values of my second fly (crash) are 2185, 2930.

      Generaly I copy the logs of the day flights on my PC and I delete the logs on my APM.

      • I can't download the log file, try uploading again.

          • My guess would be that you lost a prop or had a hardware failure.  Have you tested all of the motors and ESCs since the crash?  You lose roll and pitch control but everything else seems pretty normal during that time.

            • hello

              today I tested all my motors and ESC, on my APM 2.5.

              Evething is OK

              On the crash time, my sensation was that the hexa became a non controlled flip by the left...

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