Boeing 707

The Boeing 707, also known as the Boeing 720, was the first airliner built for mass production by Boeing. Boeing delivered 1,010 707s. It was not the first commercial jetliner, but was the first to be successful. It leaded commercial transports in the 1960s, and remaining common in the 1970s. It was the first of the "7x7" designations

367-80
The 367-80 (Dash 80) was the first prototype for the KC-135 Stratotanker and the Boeing 707. It was outfitted with four Pratt & Whitney JT3C engines, each producing 10,000 lbf (44.5 kN) The first flight was 15 July 1954.

717
The Boeing 717 was the name for the KC-135 Stratotanker and the C-135 Stratolfter. The name was used in the renaming of the MD-95 after McDonnel Douglas merged into Boeing.

707-120
The 707-120 was the first production variant of the 707. It had a longer and wider fuselage than the original Dash 80. A full set of rectangular cabin windows were included in the interior, with a seating capacaty of 179. It was designed for transcontinental flights, and it had to be refueled on North atlantic Routes. Orders were sent in by Pan Am for 20 707-121 Aircraft, and an American Airlines order for 30 707-123 aircraft. The first flight was on December 20, 1957. The first revenue source of a 707 was on October 26, 1958.