Helicopter Theory (Dover Books on Aeronautical Engineering) About the Author Dr. Wayne Johnson worked in NASA at the Ames Research Center in California as well as for the US Army. He has his own company called Johnson Aeronautics, through which he works for the development of software programs that are widely used worldwide for analysing rotorcrafts. in this book, the author managed to compile a valuable resource that is necessary for all students and engineers interested in the design and development of vertical-flight aircrafts.