This Day in Aviation History
November 22nd, 1946
First flight of the Martin 2-0-2.
The Martin 2-0-2 was an airliner introduced in 1947. The twin-engined piston fixed-wing aircraft was designed and built by the Glenn L. Martin Company.
Glenn L. Martin, president of the company, intended that the Model 202 would be a replacement for the Douglas DC-3. It was also known as the “Martin Executive”._
The first flight of the model was in November 1946. Full civilian certification was gained in August 1947. This was several months before competing aircraft types. The total production of 2-0-2 and 2-0-2A was 47 aircraft.
The aircraft was non-pressurized but was considered a long range airliner. The fatal crash in 1948 of Northwest Airlines Flight 421 revealed a serious structural problem in the wings. Structural metal fatigue was the problem in a major wing spar. Alloy 7075-T6 was used, which is susceptible to stress-corrosion cracking and low toughness. The airliner was grounded and modifications were made. The wing components were redesigned and the engines replaced. The changed type was designated the Martin 2-0-2A….
Wikipedia, Martin 2-0-2:
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