In April 1944, test pilot Anthony Martindale dove a Spitfire to Mach 0.92, lost the entire propeller and reduction gear, blacked out under 11 Gs, and woke up in a bent but intact airframe that he glided 20 miles to a safe landing. Drawing on declassified RAF combat reports, Supermarine schematics, diaries, and pilot memoirs, this episode tells the life story of the aircraft that brought him home and asks how a design born from failure became so adaptable it refused to go obsolete.

We begin with R.J. Mitchell’s flawed Type 224, which lost out to a biplane, and the rethink that paired an enclosed cockpit and retractable gear with the Rolls-Royce Merlin engine. We cover the name Mitchell hated, the March 1936 prototype flight, and the two-year production delay caused by stressed-skin construction, flush riveting, and the Castle Bromwich shadow factory that produced zero aircraft until Lord Beaverbrook intervened. Then we look at the mathematics behind the elliptical wing, the teenage ballistics calculations of Hazel Hill that justified eight machine guns, the washout that gave pilots a built-in stall warning, and the carburetor trade-off that cut the engine in a negative-G dive.

• How Beverley Shenstone’s semi-elliptical planform minimized induced drag while hiding landing gear and guns
• Why Spitfires hunted Bf 109 escorts while Hurricanes carried the heavier load in the Battle of Britain
• How decentralized production in garages and bus depots kept the Spitfire flowing after Southampton was bombed
• How Joe Smith stretched a 1,000-horsepower airframe to carry Griffon engines of over 2,000 horsepower
• The 1962 Binbrook trials in which a supersonic Lightning jet struggled to shoot down a vintage Spitfire