The Boeing 367-80 is an American prototype jet plane. The people who worked at Boeing called the plane the "Dash 80". It was made to show airlines how good jet aircraft were.
The Dash 80 was the prototype for the Boeing KC-135 Stratotanker and the Boeing 707. It was made in less than two years.
Only one was made. It is now in the Steven F. Udvar-Hazy Center at Washington Dulles International Airport in Virginia.