Originally Posted by jester_s1

Your props look fine in the pictures, but for future reference you don't go by the writing to see if they are on straight. You make sure the convex side is facing up or in the direction you want the prop to pull. The concave side is what pushes the air.

If you are flipping i'd suspect a motor is spinning the wrong way. Failing that, something may be screwy with the settings on your flight controller. I'd suspect a gain is reversed which would lead to a very fast flip as soon as you spin up. You can check your gain directions by holding quad in your hands and having someone advance the throttle for you. If the quad resists your effort to turn it, then settings are in the right direction. If you find it trying to turn on its own or helping you turn it, they are reversed.