flip take off

Hi Community, I have been building my first quad, and when I have gone to test it, it flips on takeoff. I have the below specs: openpilot cc3d 4 x DYS 2830-14 750kv 4 x 14x4.7 props (cw & ccw) Hobbypower simonk 30a esc w/ bec 490mhz Turnigy 30-40c 1000mah 4.s (testing battery) frsky x8r...