This film explains the concept of the 4 engine jet transport along with the various systems that comprise the then new Boeing 707 Dash 80 airliner.

Boeing rolled out their 707 Dash 80 in 1954. This is a quite nicely preserved color film that was made to capture this historic event. The new 707 could fly twice as fast, carry twice as many passengers as the prop planes it replaced, and could fly at twice the altitude. But it was also considerably more costly than the prop airliners of the mid 1950s.