Copter Crashed in Loiter Mode with Video

ArduCopter Copter 4.6
1

Hi, I built myself a quadcopter (my first time) I used Cube Orange+, Blheli_s esc, 1245 propeller, radiolink gps, 4s 16000 mah, SunnySky X4108S 690KV motors. My Quadcopter total weight is around 2700 grams and total lift is I believe around 7600 grams. It was my second flight. It was very windy. I couldn’t figure out how to analysis log files. It would be really helpful if someone reviews it and point me the directions. I believe it crashed when it was in Loiter mode.

Link for log file : 2025-03-29 14-43-31.bin - Google Drive

2

Here are a few things,

  1. Did you setup the drone using Methodic Configurator
  2. your battery current sensor is not config correct
  3. Your vibrations are way to high, some of it could be from poor tuning
  4. you are not logging very much if it is your first few flights
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3

In addition to @prsh8ya comments it look like you had thrust loss on Motor 4.

4
  1. No, I configured it using Mission Planner, I did each calibration from Setup > Mandatory Hardware menu except ESCs, I calibrated them using Blheli Suite.
  2. I didn’t connect the motors to the Power Brick Mini because in max throttle total current consumption is around 100A and I didn’t know if power brick mini is capable of that much current. So I am trying to fly based on voltage.
  3. I mounted it with double-sided tapes included in the cube orange packaging.

Here is my wiring diagram

Ekran görüntüsü 2025-03-31 215600
Ekran görüntüsü 2025-03-31 215600876×935 174 KB

5

If you dont mind, how could you tell it? Checking the logs or from the video? I am trying to understand how to analyze logs. What parameters are too high too low etc.

6

The video indicates one appears to stop, which should also be documented in the logs.

7

image
image1518×445 42.7 KB

Here is the site to start reviewing your logs.

Start over and configure your quad with this…

There is a ton of information there with that software.

My advice is DON"T TRY AND FLY AGAIN until you have addressed the vibrations, and configured it with Methodic Configuator.

3 Likes
8

Thanks I’ll check it

9

Oh and if your quad is 2.7kg and your pulling 100amps then something is really wrong.
image

10

Not continuous, when it is %100 throttle according to motor spec sheet

11

Motor 4 output goes to max indicating it has lost thrust and then it goes down.

RCout
RCout1659×521 109 KB

2 Likes
12

Is there a reason why would it happen? Defect motor or does the log show after it crashed?

13

This is what you do now. Open the log in Mission Planner and graph the same fields shown in the above graph and then include Baro>Alt and you will see if the motor lost thrust before or after it crashed. The answer is before. The fault caused the crash.
It’s often not clear from a log what failed. You don’t have ESC telemetry in the log which can offer some clue sometimes.

3 Likes