The Comet 1 airliner roared into the air— and into history—on 20,000 pounds of thrust from its four De Havilland Ghost jet engines. For the first time ever, a jet-propelled aircraft was ...

as is the basic idea of what a commercial airliner looks like. It hasn't changed very much at all since the introduction of the jet engine in the 1950s. On the other hand, aeronautics is far from ...