Douglas DC-9

The Douglas DC-9 is a twin-engine short-range jet passenger aircraft. Produced by McDonnell Douglas from 1965 to 1982. The acronym DC stands for Douglas Commercial.

History

In the 1950s, Douglas Aircraft researched the creation of a medium-range aircraft to complement the flagship of its fleet – the long-range DC-8. The first attempt was the Model 2067 project, but it was planned four-engine and was too expensive to operate. Then Douglas entered into an agreement with the French Sud Aviation Caravelle on the licensed assembly of their aircraft in case of receiving a large number of orders. There were no orders, and the agreement was canceled – Douglas returned to the drawing board.

In 1962, the work was in full swing and, finally, among the many options was chosen one that eventually became the original DC-9. The production of liners was launched a year later.

The aircraft was designed for short and medium routes, small airports with short lanes and undeveloped infrastructure – this sector were inaccessible to the large and whimsical Boeing 707 and DC-8. Also, the rear location of the engines made it possible to produce a “clean” wing – without pylons, which made their products cheaper and improved aerodynamic quality.

The first airliner took off in 1965, the second took off two weeks later, by the end of the year 5 test boards were released. In total, 10 aircraft participated in the tests and, after receiving the type certificate, on December 8, Delta Air Lines began flights.

DC-9 was a very successful aircraft – in total, until 1982, 976 aircraft were produced. In total, 2,400 aircraft were produced in various versions, which puts this series in third place in terms of mass after the Boeing 737 and Airbus A320.

The DC-9 program was continued by the MD-80 series in 1980. Initially, the series was called DC-9-80. There was an extended version of -50 with increased take-off weight and modified wing and landing gear.

In turn, the MD-80 became the basis for the new MD-90 series, created in the 1990s. A new fuselage, a glass cockpit, and engines made this aircraft practically new. However, unlike the MD-80 that has spread around the world, the MD-90 has not been successful.

The final version of the aircraft was the MD-95, which went into mass production under the name Boeing 717-200. The name change followed the purchase of McDonnell Douglas by its old competitor, Boeing, which, as a result, became practically the exclusive manufacturer of large airliners in the United States.

Specifications

  • Type: Regional Passenger Aircraft
  • Powerplant: two twin-circuit turbojet engines Pratt Whitney JT8D-7 for 6 350 kg each
  • Maximum number of passengers: 90 people
  • Practical ceiling: 10 670 m
  • Range: 2 030 km
  • Maximum take-off weight: 41.1 t
  • Cruising speed: 900 km / h
  • Wingspan: 27.30 m
  • Wing Area: 86.80 sq. m
  • Length: 31.80 m
  • Height: 8.40 m
Graduated from Embry-Riddle Aviation University with a master's degree in aviation science. He began his career as an aviation researcher in local periodicals. Has a pilot license. Now are the author and developer of the Plane Worlds.