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Phantom 2 Wont take off. No Lift
2592 10 2014-9-28
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lvl.1

United States
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Phantom 2 Wont take off.  There is no lift.

I replaced the motors and 1 of the ESC boards.

Now I put the copter back together and it wont fly.

The motors and prop spin fast and have power.

The air from the props is blowing upwards and is keeping the copter on the ground.
I did notice that the props will tighten on to the rotor, but when I accelerate the props with the controller, 1 or 2 of the props seem to unscrew from the rotor.

I think I may have installed the motors in the wrong orientation and the threads on the motors are wrong, so the blades become unscrewed...

How can I reverse this to make it lift, should I reorient the motors again?

I am confused.

I saw some video on youtube that I have linked below.





They have the same issue, but they installed the motors in the wrong orientation because the top shell of the phantom was put on in the wrong direction.

My top shell is in the correct direction.  Picture attached.

I will post a video to explain this.



2014-9-28
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hd_ultra
lvl.4

United States
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Sounds like you put the props on wrong. Black on black silver on silver. When you put the motor on did you check to see if the orientation of direction is correct.
But sounds like props not installed correctly.
2014-9-28
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lvl.1

United States
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Here is the video of what happens.

Keep you eye on the left front prop in the video.

You can see that it screws off.

I have come to the conclusion that the motors are oriented wrong.
You can here the rattling of the prop unscrewed and resting on thop of the spinning rotor.

Notice how the prop unscrews when I accelerate, but then screws itself back on after I stop.

I think I need to reorient each motor to solve this.

http://youtu.be/WtBE_NTa5Ms
2014-9-28
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T J Gilbert
Second Officer
Flight distance : 74659 ft
United States
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There's no way to screw the props on wrong.
They either tighten on the shaft or they don't.
I can't tell from the video if all of your props are unscrewing...
What you've done is install the CW motors in the CCW positions, and vice versa.
-or-
You've got the motors positioned properly, but wired backwards.
Look at your Phantom shell where the motor directions are molded in for reference.
#1 & #3 = CCW
#2 & #4 = CW
Mount them and wire them accordingly...
2014-9-28
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lvl.1

United States
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Figured it out.  The motors were in the wrong positions.
Swapped them out and it works fine.

Time to fly!!
2014-9-29
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djiuser_0e1TsCUR3db8
lvl.1
Flight distance : 1001 ft
United States
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hd_ultra@msn.co Posted at 2014-9-28 19:41
Sounds like you put the props on wrong. Black on black silver on silver. When you put the motor on did you check to see if the orientation of direction is correct.
But sounds like props not installed correctly.

I know I'm a noob for saying this but I was literally having the same problem and your comment was the most informative and helpful thing I've read all day.  IF ONLY DJI PUT THAT IN THEIR DOCUMENTATION!!!  grrr...  Thank you!  I'm flying again and still have some daylight left to play, so the whole day wasn't a complete loss!
2018-3-10
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Geebax
Captain
Australia
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djiuser_0e1TsCUR3db8 Posted at 2018-3-10 14:18
I know I'm a noob for saying this but I was literally having the same problem and your comment was the most informative and helpful thing I've read all day.  IF ONLY DJI PUT THAT IN THEIR DOCUMENTATION!!!  grrr...  Thank you!  I'm flying again and still have some daylight left to play, so the whole day wasn't a complete loss!

Except he was wrong, the props were fine, but the motors had been installed in the wrong positions.
2018-3-10
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Homer Simpson
Second Officer

Canada
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Is the wiring correct? They are DC maybe they are reversed?
2018-3-10
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badvision
lvl.1
Flight distance : 1001 ft
United States
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Geebax Posted at 2018-3-10 14:29
Except he was wrong, the props were fine, but the motors had been installed in the wrong positions.

Maybe in your case he was wrong -- in my case the props were on the wrong motors.   If the documentation had said it I would have known it without reading it on a random forum post.  But as for your wiring, good luck!  That's delicate work!
2018-3-11
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Homer Simpson
Second Officer

Canada
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jpg@jpghawaii.c Posted at 2014-9-29 02:28
Figured it out.  The motors were in the wrong positions.
Swapped them out and it works fine.

Good, enjoy the flight.
2018-4-1
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Octovisuals
lvl.2

Spain
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If only DJI would care enough about the documentation... lol
2018-4-1
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