Martin 4-0-4

Martin 4-0-4
Nine Martin 404s of Southern Airways at Atlanta Airport in 1972, being prepared for departure on the morning wave of flights
General information
TypeShort/medium range airliner
ManufacturerGlenn L. Martin Company
Primary usersEastern Air Lines
Number built103
History
Manufactured1951-1953
Introduction date1951
First flightOctober 21, 1950
Developed fromMartin 2-0-2

The Martin 4-0-4 is a pressurized, all-metal, low-wing 40 passenger American airliner built by the Glenn L. Martin Company and introduced in 1951. Derived from the unpressurized Martin 2-0-2, it is 3 feet longer, powered by the same Pratt & Whitney R-2800 Double Wasp-CB16 18-cylinder radial engine, and slightly slower. In addition to commercial airline use initially in the United States, it was used by the United States Coast Guard and United States Navy as the RM-1G (later as the VC-3A).