How to build a 1 hour 250g Ardupilot quadcopter

With the optical flow and rangefinder I can park it in the middle of the room, and it will sit there for an hour without having to touch it. With 5" propellers it’s a little scary to try and fly through the house, I dont have any full length videos just some hdmi capture from the groundstation doing when testing the digital video system, I have a version 2, that I need to finish that should fly for even longer.

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