I love problem solving. With the development side of things there are, unfortunately, so many problems that need to be overcome. When you come to it you have to think on your feet and find a solution; it is very satisfying.
The propulsion system of a car is the engine. I test the engines before they go into cars, or I develop them so that they are the best they can be when they do go into cars. I also test boats and planes – any kind of propulsion device.