William J. Norton is a flight test engineer, continuing a career as a US Air Force officer for twenty years where he also served as aircrew on test aircraft. Norton has held numerous positions in many organisations on dozens of aerospace programmes spanning all aircraft types. He has penned scores of technical papers, fourteen books, a multitude of magazine articles and holds a Masters in Aeronautical Engineering. Also, he is a civil pilot with numerous ratings, restored and operates a DHC-1 Chipmunk and built a Rutan Long-EZ.