Yes, those tempus fugit coils are a pain to balance. If the clockwise and counterclockwise coils are not in perfect balance then the time machine tends to drift off into the future or past, which makes it really hard to keep parked.
There's a term for that imbalance, btw. It's "the tempus fidgets."
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.