Stalling
In 1915 Frederick Lindemann a 29 year old physicist whose earlier work had included glass and radiation, joined the staff at the Royal Aircraft Factory at Farnborough (where Col. Cody had demonstrated flying some years earlier).
A lot of would-be pilots for the Royal Flying Corps and the Royal Naval Air Service were killed whilst learning to fly, by first stalling and then getting into a "Tail-spin". Lindemann developed his own theories. (He may have visited some injured pilots to hear that " Once in a spin I pulled back as hard as I could on the Joystick - so that I would not hit the ground. But it didn't do any good...")
Lindemann learned to fly in 1916, just to try out his theories. Aged about thirty he would have been ten years older than most people learning to fly.
His ideas WORKED - and have been taught to would-be pilots ever since... Saving countless lives...
( Health and Safety would have been appalled at the risk he took.)
Later as "The Prof" he was to be Churchill's Scientific Advisor and become Lord Cherwell. Perhaps he was not always right.