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Well, the folks over at the OpenPilot forums solved my problem: the CC3D was facing the wrong way. Flies beautifully now!

Na, I just reset it and got the same results. It seems to be spinning around one of the motors... Could that mean that the motor/esc could be messed up?

This quad has caused me so much trouble... Once again, it is flipping on takeoff, but now it spins too. The motors are all in the right positions and the props are set up correctly. Not sure what to do here... https://vid.me/7gqt

What landing gear is that? Also, what accessories did you purchase from Hexacrafter for the HC-850? Rails, or just a gimbal mount? Looks great!

When I had mine, it took me an extremely long time to fix it. I thought that they were even too, but I fixed it after awhile... Look at this and see if it seems similar: http://multirotorforums.com/threads/hexacopter-spinning-while-in-flight.26348/

I had the same problem with the Tarot 680Pro. My problem was that the motor mounts were not completely even, causing the copter to spin. It sounds like that is the issue.

It looks like a great camera(cutting $300 off of the Blackmagic) but, after a brief search, it seems as though the only output is HDMI. The nice thing about the Blackmagic is the composite out.

That is what I was thinking, but I didn't think about the camera part... That brings me to my next question: what if you were to have a copter (say a hex) with 2 motors down, 4 up? Would that affect flight?

So I have been wondering this for a while now. I would say the majority of copters are using motors that are facing up(pulling?), though there are some copters that have the motors facing down(pushing?). What is the difference between this? Is one more efficient than the other?

Great idea, didn't think about that.

Yeah, the motors mounts are pretty difficult to make completely even. Thank you for solving my problem.

Yeah, that was my problem before but all of the motors are in the correct positions now... It sometimes flies fine but sometimes it spins...

New thought... Could it be the wind? It seems to only be affected as I get higher in the air and the drone is always pushed downwind. If this is the case, would the 3DR airspeed sensor solve this problem?

So I finally got my hexacopter up in the air, but now it spins mid flight(yaw)... I'm thinking maybe a weight problem. It is running on a Pixhawk.

So the ESC that is plugged into the first slot in the Pixhawk should be the motor at 3:00? I do have it starting at 1:00 so that might be my problem...

I don't have windows so I have to use APM planner.... I think the problem might be weight distribution. The battery is on the back half of the copter facing sideways in proportion to the copter. Regardless of the angle I take off from, the copter always flips towards the the back half(where the...

So I finally have my Tarot 680 Pro assembled using a Pixhawk. The problem is whenever I take off, it flips. I tried re-calibrating the gyros but that did nothing. I'm not really sure what to do... Here is a video of it: https://vid.me/g5hb

So I have my 680Pro assembled and soldered, my one problem is the motor mounting hardware. I have SunnySky V2216-12 KV800 motors but its mounting hardware does not fit on the motor mount for the 680Pro. Should I just drill holes into the CF? Or should I purchase new hardware? If so, what would fit?

I will do some more research, thanks

So it turns out the power module you use for the Pixhawk has a built in BEC. Does this solve my problems?