prototype
HM599 Following the outbreak of the Second World War Humble was invited to join Hawker Siddeley's team of test pilots, taking up the role on 10 October 1940. The testing team was led by
George Bulman and
Philip Lucas. Humble was initially involved in testing
Hurricanes as they came off the production line at the rate of seven a day. Having proved his ability, he was soon assigned to help test and develop new aircraft types, initially the
Hawker Typhoon, and then later types derived from it, the
Hawker Tempest,
Hawker Fury and Sea Fury. The Typhoon became particularly important as a "tank-buster" during the
Normandy Campaign, and the Tempest in the fight against the
V-1 flying bomb. Development of the Fury was a particularly difficult experience. The aircraft could approach the
sound barrier in a dive, causing unexpected handling problems; the
Bristol Centaurus engine was also still relatively new and experienced many problems, on more than one occasion it was only Humble's skill as a pilot which prevented a crash. Bulman had retired towards the end of the war, Lucas then became Hawker's chief test pilot. In mid-1945, Lucas was promoted to the board of the company, and in early January 1946, Humble was appointed the new chief test pilot. Hawker now moved into the jet age, with Humble making the first test flight of the
Hawker P.1040 from
Boscombe Down on 2 September 1947. This ultimately entered service as the
Hawker Sea Hawk. ==Later life and legacy==