450Quad crashed in stabilize mode!!!

Hay guys....

                I was flying a 450quad with pixhawk3.3.3with vibration dampers, M8n gps, 3DR telemetry, BEC module and futaba transmitter. I had a clean fight in stabilize mode for about 3mins and then quad suddenly yawed in counter clockwise direction for 3 times and fell into the ground.... from dataflash log, it showed EKF error... but I dont know what caused that error.... all the esc and motors are working fine. I dont think that prop could be damaged  or any other mechanical issues during flight... I am attaching the log file below... pls someone could analyse and tell what could caused crash....

2017-02-21 16-55-13.bin

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –


  • Hay  Mossbackfarm... I checked all the motors and escs. All are fine... I use vibration isolation for mounting the pixhawk. I even flew the same quad about five times before the crash (sixth flight crashed)

  • Hay  Michael Burmeister thanks for the reply.... I have attached the correct file... I could plot motor outputs (RCOUT)... I will also attach .log file 

    "I think it is possible to crash in Stabilize mode with version 3.3.3 do to over use of the GPS in this mode" - Stabilize mode does not use gps inputs. can you explain me more clearly?

    2017-02-21 16-55-13.log

  • At 3:28:30, yaw starts picking up right after your vibrations start to spike after being good for the previous portions.  Check motor / esc?

  • This log shows a normal flight with no issues.  RCOUT is not logged which is needed when determining an issue with flight.

    I think it is possible to crash in Stabilize mode with version 3.3.3 do to over use of the GPS in this mode.  Later version I believe corrected this issue.

    This log did not show any of this and did not show any Yaw issues so I don't think this is the correct log.

This reply was deleted.


Hiroki Tanaka liked Hiroki Tanaka's profile
Oct 13
Derrick Davies liked lisa TDrones's profile
Sep 23
xemone liked Max Gilson's profile
Aug 31