This was my first UAV. It was the simplest, cheapest UAV possible: a magnet. It couldn't fly very high, it couldn't follow waypoints, it couldn't carry much of a payload, it was even more unstable than a helicopter, but it could fly as long as PG&E didn't have a rolling blackout. The guidance system was as simple as can be. Just pulse the throttle when too low or high. Scale the duty cyc…