Quadcopter first flights

I built a 150g carbon fiber and plastic frame, but it broke on my first flight.

 So I made a frame from 12mm plywood, weighing 600g, plus a cardboard box taped to the bottom, as a shock absorber. I have had some fun learning to fly this; it's not so hard as I don't need to touch the yaw control, so I just have throttle, roll and pitch to worry about, like on my plane. I only got 8 minutes flying time from it.