Wing Commander James Leonard Dell OBE (23 August 1924 – 25 March 2008) was a British test pilot.
Dell remained in the RAF until 1959, retiring with the rank of wing commander, to join English Electric as their deputy chief test pilot.
Dell appeared in a 1962 episode of "Look at Life", in which his work as a test pilot is portrayed.
Following Beamont's retirement in 1965, Dell became BAC's chief test pilot, and was later involved in the Jaguar and Panavia Tornado projects.
He retired as director of flight operations for British Aerospace in 1989.