Sir Arnold Alexander Hall FRS FRAeS (23 April 1915 – 9 January 2000) was an English aeronautical engineer, scientist and industrialist.

[1] Hall was born in Liverpool, and attended Alsop High School in Walton, before going to Clare College, Cambridge, where he took the Mechanical Science Tripos, and was awarded a first class honours degree with distinction in aeronautics, heat engines, applied mathematics and theory of structure.

He initiated the construction of new laboratories concerned with aerodynamic and structural research at Imperial College and became a member of the Academic Council of the University of London.

[1] In 1939 while Chief Superintendent of the RAE, in association with Sidney Cotton he worked on the modifications needed to enable Supermarine Spitfires to be used in the photo-reconnaissance role.

[2] During World War II, he designed gyroscopic gun-sights for D-day fighter aircraft, and the compressor for Frank Whittle's first jet engine.

In 1959, Hall received the Dutch Aero Club von Baumhauer Medal, which is awarded only every five years, for "his meritorious work on behalf of Aeronautical Science in general and particularly his outstanding contribution to the knowledge and understanding of the problems of fatigue in aircraft structures".