Its success encouraged Sir Harry to a lifetime of engine design and development .
This four - stroke stratified charge engine , designed by Sir Harry Ricardo at the age of 17 , was built in 1903 and used for pumping water at his family home .
Its success encouraged Sir   to a lifetime of engine design and development .
This four - stroke stratified charge engine , designed by Sir Harry Ricardo at the age of 17 , was built in 1903 and used for pumping water at his family home .