Sir Bennett Melvill Jones, CBE AFC FRS (28 January 1887 – 31 October 1975) was Francis Mond Professor of Aeronautical Engineering at the University of Cambridge from 1919 to 1952. He demonstrated the importance of streamlining in aircraft design. It had been known since the time of Aristotle, that a moving body passing through air or another fluid encounters resistance (aerodynamic drag), but Jones developed the ideas of Louis Charles Breguet into a refined theory to demonstrate emphatically the importance of drag to the performance of aircraft.