Oscar Biblarz is Professor Emeritus in the Department of Mechanical and Aerospace Engineering at the Naval Postgraduate School, Monterey, California, USA. He has over 35 years’ experience teaching and researching aerospace propulsion and fluid mechanics. He holds memberships in the AIAA and the APS. He is coauthor of Rocket Propulsion Elements (with George Sutton) and Fundamentals of Gas Dynamics (with R. D. Zucker), both published by Wiley.