F450 flips on take off

hello! i have a problem… i have F450 quadcopter drone and it flips if i try to take off… i have change propellers and all motors turn to the right direction… what can i do? i have also flysky fs-i6 and APM2.8

Not really a blog post. This should be posted in copter 3.2.1 section

I have moved your post to the Arducopter 3.2 section.

To be able to even guess what is happening we need a lot more information.
A flight log from the APM for a start.
Details about your setup?
Video of it flipping?
It might be just the way you are trying to take off.

You need to provide details to get a detailed answer.

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can you send me an email so i can send you videos?