If you have not yet heard of Sir Stanley Hooker, this will come as a treat. As a young (and brilliant) mathematician he joined Rolls Royce near the outbreak of WW2 - to find that the Merlin engine which powered the all-important Hurricane and Spitfire was down on power due to a supercharger design flaw that only he had spotted due to his mathematical abilities. In finding that extra power he will have earned the gratitude of a generation of pilots and by extension the gratitude of the nation whose existence depended on their ability to out-fly the invaders.
There is more... Throughout the war he continuously extended the development of the aircraft enigine superchargers that he had mastered, and became one of the first to appreciate and support Whittle in the development of the Jet Engine. Hooker was one of the key figures in the success of Rolls Royce jet engines, and went on to develop the Key ingredient in the Harrier Jump-jet, it's dedicated power plant.
And more, much more....
"Not much of an Engineer" has its dramatic personal twists, and Hooker is ruthless with what he saw as his own personal failings. In addition to his mathematical and engineering skills, he writes both fluently and with feeling.
Beg, borrow, or buy it, and read it. Highly recommended.
