WHY DOES MY DRONE DO THAT WHEN I ARM?

It's one of these:

1. Board orientation not correct

2. Prop on wrong

3. Motor direction is wild

4. Motor order out of order

5. Prop direction, motor direction, motor order, mercury in the gatorade

It's always one or more of the above, and it's the last problem between you and flying this thing, so it's a particuarly frustrating one. you've probably been working on this for a long time, and let me just say first of all GOOD JOB getting this far. We're almost there, and this is easy to fix so hang in there! Trust the process and if you apply the steps in order it should work out for you easily in the future.

1. Board orientation: This one is easy to figure out! when you first open up betaflight there is a 3d model of the drone that moves around in real time, there is an arrow that points toward the front. move your drone around while plugged in and see if it responds properly. hold it level and still, roll it slowly to one side, does the one on the screen react the same way?

2. Props on wrong: think of a propeller as a knife that cuts through the air in order to provide lift. it needs to be spinning in the direction that the knife blade is facing uphil into the air as it spins around. there are 2 different kinds of propellers, CW and CCW. (Clock wise and counter clock wise) and they go in specific spots. a good rule to remember is that they always have to alternate. no two of the same next to each other. there are two differnet orientations, "Props Out" - props spinning away from the camera (good for open prop drones, it pushes brush away from the camera) and "Props in" - spinning towards the camera, better for whoops and ducted quads. there is a little switch top left of the motors tab that says "Motors are reversed" - this needs to be selected if you are running props out.