The Mac Douglas DC-9

The McDonnell Douglas DC-9 (initially known as the Douglas DC-9) is a twin-engine, single-aisle jet airliner. It was first manufactured in 1965 with its first flight later that year. The DC-9 was designed for the frequent, short flights. The final DC-9 was delivered in October 1982. The DC-9 was followed in subsequent modified forms by the MD-80, MD-90 and Boeing 717. As of May 23, 2006, with the final two deliveries of the 717, production of the DC-9 aircraft family has ceased after 41 years. Douglas launched the DC-9 development project in April 1963, intending the DC-9 as a short-range companion to their larger four engined DC-8.[1] Unlike the competing but slightly larger Boeing 727, which used as many 707 components as possible, the DC-9 was an all-new design. The DC-9 features two rear fuselage-mounted Pratt & Whitney JT8D turbofan engines, small, highly efficient wings, and a T-tail.[1] In most configurations, DC-9 aircraft have distinctive 5-abreast seating in coach class. The airplane seats 80 to 135 passengers depending on version and seating arrangement. The DC-9 prototype first flew in February 1965. The second DC-9 flew a few weeks later and entered service with Delta Air Lines in late 1965.[1] The initial -10 variant would be followed by subsequent growth variants. The final DC-9 variant was the -50, which first flew in 1974. The DC-9 would be a commercial success with 976 built when the production ended in 1982. The DC-9 would be followed by the introduction of the MD-80 series in 1980. The MD-80 series was originally called DC-9-80 series and was a lengthened DC-9-50 with a higher maximum take-off weight (MTOW) and higher fuel capacity. The MD-80 series was then developed into the MD-90 in the early 1990s. The last variant of the family was the MD-95, which was renamed the Boeing 717-200 after McDonnell Douglas's merger with Boeing in 1997 and before aircraft deliveries began. The DC-9 family is one of the most rugged, longest-lasting aircraft currently in operation. Northwest Airlines still operates a fleet of DC-9 aircraft, most of which are over 30 years old. That reputation for reliability and efficiency drove strong sales well into the 2000s. The long-lived DC-9 family is one of the most successful jet airliners ever made with total sales of over 2,400 units; it ranks third behind the second place Airbus A320 family with 3,000 total sales, and the first place Boeing 737 with over 6,000 total sales.


Caracteristics of Mac Douglas DC-9
- Crew : 2 pilots + cabin crew
- Wingspan : 28,50 m
- Lenght : 36,37 m
- Height : 8,38 m
- Wing area : 92,97 m2
- Masse à vide: 26 535 kg
- Maximum takeoff weight : 49 000 kg
- Range : 2704 nm (about 5000km)
- Cruise speed : 439 kt
- Ops ceiling : 37 000 ft
- Powerplant : 2 engines Pratt & Whitney PW127F of 2 475 Horses.
- Capacity : 106 passengers

The Mac Donnell MD80

McDonnell Douglas MD-80 and MD-90 are twin-engine, medium-range, single-aisle commercial jet airplanes. The MD-80 series and MD-90 have seating capacity up to 172 passengers. They have a common cabin layout that seats 140 passengers on scheduled flights and 161 or 165 on low-cost or charter flights. The MD-80 series was derived from the DC-9 and it was introduced commercially in October 1980 by Swissair. The MD-80 series was followed in modified form by the MD-90 in 1989 and the MD-95/Boeing 717 in 1998. The MD-80 series is a mid-size, medium-range airliner that was introduced in 1980. The design was second generation of the DC-9 with two rear fuselage-mounted turbofan engines, small, highly efficient wings, and a T-tail. The aircraft has a distinctive 5-abreast seating in coach class. It was a lengthened DC-9-50 with a higher maximum take-off weight (MTOW) and the ability to carry more fuel. The airplane series was designed for frequent, short-haul flights for 130 to 172 passengers depending on plane version and seating arrangement. The development of MD-80 series began in the 1970s as a growth version of the DC-90 Series 50. Availability of new Pratt & Whitney JT8D higher bypass engines drove early studies including designs known as Series 55, Series 50 (Re-fanned Super Stretch), and Series 60. The design effort focused on the Series 55 in August 1977. With the projected entry into service in 1980, the design was marketed as the "DC-9 Series 80". Swissair launched the Series 80 in October 1977 with an order for 15 plus an option for five.[1] The Series 80 featured a fuselage 14 feet 3 in ( m) longer than the DC-9-50. The DC-9 wings were redesigned by adding sections at the wing root and tip for a 28% larger wing. The initital Series 80 first flew October 19, 1979.[1] It entered service in 1980. Originally it was certified as a version of the DC-9, but was changed to MD-80 in July 1983, as a marketing move. New versions of the series were initially the MD-81/82/83 and the shortened MD-87, even though their formal certification was DC-9-81/82 etc. Only the MD-88 was given an "MD" certification, as was later the MD-90. The MD-80 versions have cockpit, avionics and aerodynamic upgrades along with the more powerful, efficient and quieter JT8D-200 series engines, which are a significant upgrade over the smaller JT8D-15, -17, -11, and -9 series. The MD-80 series aircraft also have longer fuselages than their earlier DC-9 counterparts, as well as longer range. The MD-80's production ended in 1999. Notably, some customers American Airlines and Alitalia still, as of 2007, refer to the planes in fleet documentation as "Super 80" or "SP80". This model is still flown extensively by American Airlines and Delta Air Lines on domestic routes. Comparable airliners to the MD-80 series include the Boeing 737 (in particular, the 737-400 variant) and Airbus A320. The MD-80 series has been used by airlines around the world. Major customers include Aeroméxico, Allegiant Air, American Airlines, Austrian Airlines,Belle Air,Delta Air Lines, Swissair, Alitalia, Scandinavian Airlines System (SAS), Finnair, Iberia, Japan Air System (JAS), China Eastern Airlines, China Northern Airlines, Alaska Airlines, Korean Air, Austral Líneas Aéreas, and Viking Airlines. Many of the airlines have, however, started to retire the type in the 2000s. In May 2007, a total of 1,051 MD-80 and MD-90 aircraft (all variants) were in airline service, including American Airlines (301), Delta Air Lines (133), Alitalia (72), Scandinavian Airlines System (44), Japan Airlines (42),Spanair (37), Iberia Airlines (30), Saudi Arabian (29, MD-90 only), Aeroméxico (28), China Southern Airlines (24), Allegiant Air (24). In addition, some 70 other operators fly smaller numbers of the type.[2] A number of variants were proposed that never saw production. One proposal was the MD-94X which was fitted with an unducted fan engine. The MD-81 was used as a testbed for unducted fan engines, such as the GE 36 and the Pratt and Whitney/Allison 578-DX.


Caracteristics of Mac Donnell MD82
- Crew : 2 pilots + cabin crew
- Wingspan : 32,80 m
- Lenght : 45,10 m
- Height : 9,05 m
- Wing area : 112 m2
- Maximum takeoff weight : 64 000 kg
- Range : 2900km
- Cruise speed : 811km/h
- Ops ceiling : 37 000 ft
- Powerplant : 2 engines Pratt & Whitney JT8D-209
- Capacity : 172 passengers

Caracteristics of Mac Donnell MD83
- Crew : 2 pilots + cabin crew
- Wingspan : 32,80 m
- Lenght : 45,10 m
- Height : 9,05 m
- Wing area : 112 m2
- Maximum takeoff weight : 67 800 kg
- Range : 3800km
- Cruise speed : 811km/h
- Ops ceiling : 37 000 ft
- Powerplant : 2 engines Pratt & Whitney JT8D-217A/C
- Capacity : 172 passengers