Bill Sadler (engineer)

William George Sadler (3 September 1931 – 5 April 2022) designed, built, and drove his own sports racing cars, some of which anticipated the later Formula 5000 and Can-Am cars. He left racing and earned a Masters of Electrical and Electronics Engineering, then went on to design and build light aircraft and aircraft engines, and was involved in the early development of Unmanned aerial vehicles (UAVs).