PX4-based autonomous outdoor quadrotor with Odroid-XU4 Aerial Robotics Build Components: 165mm Carbon Fiber Chassis – LinkT-Motor F20-II 3750kV Brushless DC Motor – LinkDYS F18A/F20A 4-in-1 ESC – LinkRotorX RX3040TG – 3-inch Tri Blade – LinkPX4Flow Optical Flow Sensor – Link