Editor’s Note: Over the next two years, we’ll be hosting a series of GoFly Master Lectures where industry experts share advice, insights, and answer questions from anyone interested in participating in the GoFly Prize.

For the latest in our series of “Master Lectures,” we welcome Bob Parks, a Technical Fellow at Aurora Flight Sciences, a subsidiary of Boeing. He mainly works on the design of non-traditional aircraft, including sub-scale and full-scale prototyping. He has been working on VTOL aircraft professionally for 20 years, but has also worked on Mars aircraft, solar aircraft, submersible aircraft and even a few conventional aircrafts.

In this video, he lectures about using ducted fans for hover and cruise.