The Boeing 747 may be flying off into the sunset.

Demand for the jumbo jet is falling as airlines make the change to smaller and more economical aircraft.

The 747 was launched more that 40 years ago and was about three times bigger than the largest airliner at the time.

It was powered by four huge engines and featured a wide body that helped revolutionize the airline industry.

New aircraft, including Boeing's own 777 and 787 Dreamliner have gone back to the two engine model, and Boeing says they're slowing down production of the 747 to 18 planes a year, down from 21.

- Rob Archer