Boeing 707

Boeing 707

The Boeing 707 is a long-range, narrow-body airliner, the first plane with turbofan engines, produced by Boeing. Developed from the Boeing 367-80 prototype, first flown in 1954, the initial 707-120 first flew on December 20, 1957. First airline, who got this plane was Pan American World Airways in October 26, 1958. With versions produced until 1979, the 707 had four podded engines of Pratt & Wittney different modifications, such as JT4A and JT3D. Its larger fuselage allowed six-abreast economy seating, retained in the later 727, 737, and 757 models.

Variants
707-020 (720)
That was the very first version of Boeing 707. It could cover a 2,800 nmi (5,200 km) range with 131 passengers in two classes. Powered by JT3D turbofans, the 720B first flew on October 6, 1960, and entered service in March 1961. It could seat 156 passengers in one class over a 3,200 nmi (5,900 km) range.
707-120
The 707-120 was the first type of 707. The plane could hold 179 passengers. Because of its not very effective engines, during the trans Atlantic flights, it needed to go for refueling in the north Atlantic. It had four Pratt & Whitney JT3C-6 engines. The first flight with passengers was on October 26, 1958. 56 were built, plus 7 short body −138s.
The 707-138 was a −120 which was ten feet shorter than the others. It could also fly further.
The 707-120B had Pratt & Whitney JT3D-1 turbofan engines. They were a lot better than the others. The −120B had some changes made to the wings. 72 were made.

707-220
The 707-220 had more powerful Pratt & Whitney JT4A-3 engines. Five of these planes were made, but only four were delivered. The first one began its using in December 1959.

707-320
The 707-320 Intercontinental is a longer version of the 707-120. This type could hold more passengers, and had some changes made to the wings. It first took off on January 11, 1958. The longer wing carried more fuel, increasing range by 1,600 miles (2,600 km) and allowing the aircraft to operate as true transoceanic aircraft.
707-320B
The 707-320B had a few changes made to the outside of the plane, as well as new engines. The wing was changed. This plane was first used in June 1962 by Pan Am.
707-320C
The 707-320C could be changed from a passenger plane into a cargo plane. More 707-320Cs were made than any other type. It had JT3D-7 engines and a cargo door added, as well as some other changes to the wing and the floor.

707-420
The 707-420 was the same as the −320, but it had Rolls-Royce Conway 508 engines. Lufthansa was the first to carry passengers on this type of plane in March 1960.