Ding demonstrates winding and launching a free flight plane. It stalled out, but the next video captures the flight. ... https://www.youtube.com/watch?v=cG1YQV5tVOs

Here's a nifty thing I learned from Dave Z at a Concord Model Engineers fun fly. Trim your plane, and then give it a couple of notches of rudder. Your plane will circle hands-off very sweetly. And of course, the basic unit of airplane sweetness is the milli-vapor! ... https://www.youtube.com/watch?v=3ZzcnNWX000

EastBay-RC's series on getting started with the DJI Inspire 1. Details here: http://eastbay-rc.blogspot.com/2015/03/getting-started-with-dji-inspire-1.html ... https://www.youtube.com/watch?v=hxyiy4LA-8M

Part 1 is here: https://www.youtube.com/watch?v=l03SioQ9ySg Building on the intuitive model presented in part 1, we take a look at the mathematical model and write a PID control loop based on that model. Hang in there if you're unfamiliar with the math... it turns out to be pretty straight-forward code in the end! Like part 1, this is a first take. I was going to make a second take, but I discovered I had scribbled all over my only nice-looking copy of the PID math. Your comments are welcome! The printed formula is from wikipedia. I tried doing this Khan Academy style with a tablet... wow that's hard to write with, that man is a genius if for no other reason being able to use one of those things! ... https://www.youtube.com/watch?v=sDd4VOpOnnA