This will be a quick overview of the jet engine for the site. For the best simple understanding go to the presentation document. There it will give further detail to explain more features and the history that the engine has gone through.
Jet Engines are built in the modern world for many reasons. The biggest reason and most profitable is usually for transportation. Defense comes up often in the discussion due to the need for countries to have the newest tech for defense, and currently jet engine improvements still fall under that banner. Built to haul more items faster and better than older tech with similar purpose. This would be a reasonable explanation to get your feet wet to the rest of the documentation.