Born from the failures of the Martin 2-0-2, the Glenn L. Martin Company built the successor Martin 4-0-4, a pressurized 40 passenger airliner. The Glenn L. Martin Company built a total of 103 of these aircraft, starting in 1951 with deliveries mainly to TWA and Eastern Airlines.
Its main market was in the United States, but a few served the U.S. Navy and Coast Guard until the late 1960s.
Progress in newer propulsion systems soon relegated the 4-0-4 from the mainstream U.S. airlines carriers to regional and commuter carriers.
Planes of Fame Air Museum’s Martin 4-0-4 served with TWA and Pacific Air Lines. The flyable N636X now resides at the Planes of Fame Air Museum’s Valle, AZ facility.
Manufacturer: Glenn L. Martin Company
Model: Martin 4-0-4
Registration Number: N636X
Serial Number: 14135
Max T/O Weight: 44,900 lb.
Span: 93 ft. 3 in.
Length: 74 ft. 7 in.
Height: 28 ft. 5 in.
Maximum Speed: 312 mph
Cruise Speed: 280 mph
Rate of Climb: 1,905 ft/min
Power Plant: 2-2,400hp Pratt & Whitney R2800 Double Wasp 18-cylinder air-cooled radial engines