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.
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.
Source: Wikipedia "Martin 4-0-4" · CC BY-SA 4.0
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