Douglas Aircraft developed the DC-9 in the 1960s as a short-range companion to their larger DC-8.
The DC-9 was an all-new design, using two rear fuselage-mounted turbofan engines, and a T-tail.
The DC-9 has a narrow-body fuselage design with five-abreast seating, and holds 80 to 135 passengers depending on seating arrangement and aircraft version.

The DC-9 family was produced in 2441 units: 976 DC-9s, 1191 MD-80s, 116 MD-90s, and 155 Boeing 717s.
Douglas Aircraft developed the DC-9 in the 1960s as a short-range companion to their larger DC-8. The DC-9 was an all-new design, using two rear fuselage-mounted turbofan engines, and a T-tail. The DC-9 has a narrow-body fuselage design with five-abreast seating, and holds 80 to 135 passengers depending on seating arrangement and aircraft version.
The DC-9 family was produced in 2441 units: 976 DC-9s, 1191 MD-80s, 116 MD-90s, and 155 Boeing 717s.
McDonnell Douglas MD-80