MD-81 – mid-range passenger aircraft, developed by the American company McDonnell Douglas. The prototype DC-9 Super 80 made its first flight on October 19, 1979. At the end of the year, it changed its designation to MD-80. Two MD-80 aircraft took part in flight tests. Despite the serious accidents that occurred with them, certification was completed at the end of August 1980.
The first aircraft was delivered in mid-September 1980 by Swissair, but the airline received only a few units. In October 1980, she began to receive the MD-81 variant, which differed from the previous one by the more powerful JT8D-209 turbofan engines. It was the MD-81 aircraft that became the initial model, based on which a whole family of MD-80 aircraft was created, which are second only to the Boeing 737 in their market popularity. McDonnell Douglas announced plans to develop several modifications even before the certification of the original plane.
The aircraft is equipped with the usual avionics system with electromechanical data display facilities. In recent years, at the request of the customer, the digital complex EFIS can be installed. Installed 2 turbojet engines Pratt & Whitney JT8D-209 (traction 8730 kgs) or JT8D-217 (traction 9080 kgs).
- Modification: MD-81
- Wingspan, m: 32.87
- Length of aircraft, m: 45.06
- The height of the aircraft, m: 9.04
- Wing Area, m2: 112.30
- Weight kg: empty equipped aircraft 35600; maximum take-off 63500
- Fuel, l: 21840
- Engine type: 2 turbofan engine Pratt Whitney JT8D-209
- Thrust, kgs: 2 x 8730
- Maximum speed, km / h: 925
- Cruising speed, km / h: 870
- Economic speed, km / h: 810
- Practical range, km: 2900
- Flight range with max. loading, km: 1670
- Practical ceiling, m: 10670
- Crew: 2
- Payload: 135 passengers in the cabin of two classes or 155 passengers in the economy class or 172 passengers – maximum or 17,900 kg of cargo.