I guess, technically PVA is available commercially. From what Iv'e seen of it in use though, it isn't very practical. The material itself is quite finnicky and extremely expensive compared to PLA and ABS. At the price of that stuff with the issues I've heard of, you might as well just have it printed in higher quality through a service.
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.