Drone flipper Immediately After Takeoff in POS Hold

ArduCopter
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1

Hello everyone,

I’m reaching out to request assistance in analyzing a crash log. Our drone crashed shortly after takeoff from the ground. I’ve attached the .BIN log file from the flight for your reference.

  • The crash occurred immediately after arming and takeoff.
  • There was no obvious mechanical failure observed externally.
  • We’re trying to understand if the cause was related to GPS, vibrations, flight controller settings, or anything else that may be evident from the log.

I’d really appreciate it if someone could help analyze the log and point out any critical errors or configuration issues that may have caused the crash.

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Not much can be learned from this log; it’s not flying and no evidence of flipping with pitch and roll at zero. But the usual cause is wrong motor order or direction. You used Mission Planners Motor Test to confirm it’s right?

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  1. That log doesn’t contain any crash as far as I can tell.
  2. Flipping on takeoff is typically caused by incorrect motor order.
  3. Use Ardupilot Methodic Configurator.
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Thanks for the quick response.

I actually ran the Pixhawk motor test twice and verified both the motor order and rotation direction — everything matched the ArduPilot documentation.

I also completed all the essential pre-flight calibrations:

Accelerometer calibration

Compass calibration

Radio calibration

ESC calibration

Motor test via Mission Planner

Despite all of this, the drone flipped immediately upon takeoff, which really caught me off guard.

Technical Specs:

Frame Type: Hexa X

Flight Controller: Cube Orange+

Firmware: ArduCopter (latest stable version)

Motors & ESCs: Hobbywing X6 (180 KV motor with integrated ESC)

Propellers: 23-inch

Battery: 2 × 22000 mAh LiPo

GPS: Here3

RC Link: H16 remote controller

I’ll be uploading the takeoff video shortly for reference. I’d appreciate it if you or anyone else could take another look with this context — I’m still trying to figure out what went wrong here.

Thanks again for your support.

5

Thanks for reviewing the log.

Yes, I agree — the log doesn’t show any crash event because the drone didn’t get airborne. It flipped immediately during takeoff, which likely didn’t register as a flight event in the log.

As mentioned earlier, I had already performed the motor test twice using Mission Planner and confirmed that the motor order and direction were correct as per the Hexa X configuration in the ArduPilot documentation.

I’ll definitely try the ArduPilot Methodic Configurator as you suggested to re-validate the setup step-by-step — thanks for pointing that out.

Appreciate your time and guidance!

6

If this was your first attempt at flying this copter, you skipped way ahead by attempting takeoff in anything other than STABILIZE mode. At a bare minimum, follow the steps here:

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