Introducing any new commercial passenger aircraft is a significant event. After all, each new model alters aviation in some way. Even improvements, which may appear minor to an untrained eye (such as a 15% fuel consumption improvement), can make an enormous difference in an industry where the small details matter. Just look at what happened when United Airlines removed a single olive from a salad and ended up saving 40,000 dollars per year.  

And while all these changes are important, there are certain aircraft, which have not only altered the aviation industry, but have sparked a revolution.