"a constant speed there is no acceleration. " This statement is wrong. Acceleration is there always in rotation because there is always change in direction in rotation. Acceleration is change in veloicity (not simply speed), which can be either in the magnitude (which is often called speed) or in the direction or in both. Speed is related to but different from velocity.
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.