Boeing 367-80

Boeing 367-80
The Dash 80 is a low wing, four-engined jet aircraft
General information
Other name(s)	Dash 80
Type	Prototype transport/airliner
Manufacturer	Boeing
Status	Prototype, on display
Owners	Boeing
Number built	1
Registration	N70700
History
Introduction date	1955
First flight	July 15, 1954
In service	1954–1969
Retired	1970
Developed into	Boeing C-135 Stratolifter Boeing KC-135 Stratotanker Boeing 707
Preserved at	National Air and Space Museum's Steven F. Udvar-Hazy Center

The Boeing 367-80, also known as the Dash 80, is a retired American four-engined jet prototype aircraft built by Boeing to demonstrate the advantages of jet propulsion for commercial aviation. It served as basis for the design of the KC-135 tanker and the 707 airliner.

The Boeing 367-80 first flew in 1954, less than two years from project launch. Its US$16 million cost (equivalent to $182 million today) was an enormous risk for Boeing, which at the time had no committed customers. Only one example was built, which has been retired and now preserved and is on public display at the Smithsonian's National Air and Space Museum's Udvar-Hazy Center in Virginia.