My Drone won't fly - keeps crashing

ArduCopter
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1

Hi Guys. I’m exhausted honestly, it’s been taking forever to build my drone.

I am using PixHawk 2.4.8 and F450 Frame with 4x A2212 1000KV motors. I initially used 2200 mAh with 35C, but the quadcopter did not even move.

Today, I updated my quadcopter with 5200 mAh 40C LiPo battery. Now all the propellers rotate and the quadcopter moves, but in a very unstable way. I just did the ESC calibration after the battery update.

Here is the video link: Drone video - Google Drive

Can anyone checkout the video and let me know what’s exactly going wrong?

2

Lots of things are wrong.

Do you want to fix them in a fast and safe way?

3

Sure, please guide me!

4

Are you willing to learn something new and read a bit of documentation?

5

Have you verify against the motor layout, numbering and rotation from the frame class and frame type? Do you know why the rotation direction is important?

6

Yes, I have verified the rotation. I’ve configured the anti-clockwise and clockwise directions as per the documentation only.

7

Yup, please feel free to add some resources

8

Slow down the video to see for yourself. If you insist is correct, there is nobody I think can help.

Since you are so certain, Can you share how you do the verification?

9

I used Mission Planner’s Motor Test. I tested each motor one by one. But yes, let me check again, and will get back to you. Any other possible reasons or factors for this behavior?

10

If you did, how can you get it wrong. Then your motor numbering is wrong or frame class and frame type not tally. No propeller, stick masking tape to verify.

Drone don’t lift, flip and crash, as what the video shows.
You have to have an answer to yourself towards this question. Do you know why the rotation direction and motor layout are important?

11

I think it’s going to cancel out the torque acting on the body. Net Torque will be 0.

12

Good, can you have two CCWs on the left, two CWs on the right? Why household stand fan doesn’t need?

13

Flip on take off attempt is almost always a motor order or direction problem. Either because Motor Test wasn’t used or it wasn’t understood what motors should run when the A-D buttons are pressed.
order

You should have visited this post before building that.
Hardware to avoid

14

I think it’s my bad. I did the motor test and everything seemed to work fine. Then one of the motors stopped working, so I replaced it with a new one purchased from a different website, I assumed the color coding would be the same, but looks like it was reversed. Now I have corrected it, and I’ve double-checked the pin numbering. After the crash, the propeller broke. I’ve purchased a new one. I will update you, once I test them. Thank you so much for your input.

15

I think while waiting for your parts delivering, you should reference this page and understand the steps. Another thing is the thrust weight ratio for your drone. You may have to find it out. Commonly is 2.4 times. Racing drone is even higher. Low Vibration and low noise are the keys towards good stable flight.

1 Like
16

Hi,

I got the new propellers and I checked the motor rotation using the Motor Test. Also, I also connected the pins as per the below image. I have added a landing gear as well. Please see the video. When I increase my throttle, there is a flip. What do I do!? I don’t know where exactly I’m going wrong. I just need this to fly for 30 seconds.

Drone Video: Dronev2.mp4 - Google Drive

17

Did you do all the steps required before the first flight?

Anyway the motor order is still wrong. The correct order is A B C D Not 1 2 3 4

18

Is this the correct order given in the below image? I followed this. What are the steps before the first flight? I’m new to this, I’m not aware of this.

image

19

Yes, but your video placement is 90 degree rotated.
Your drone nose heading in the video is not same as image.

Remove propeller and do a motor test video instead. Place your drone the same heading as the image. Use the lowest throttle % enough to start the motor spinning, increase spin duration, like 10 sec, Stick something to motor so you can tell the motor rotating direction. Patiently press the top most button to start A motor and verify spin direction, follow by next below button to start motor B…

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20

Do the tests as described by @Jai.GAY and after that do NOT take off.
Use the ArduPilot Methodic Configurator software and follow it’s instructions. It will tell you when it’s time to takeoff

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