The Stearman LT-1 (Light Transport-1) was a late 1920s American biplane, carrying four passengers plus mail. == Design and development == The LT-1 was a slightly enlarged version of the Stearman M-2 Speedmail with four passengers in an enclosed cabin and space for 500 lb (230 kg) of mail.
The Stearman LT-1 (Light Transport-1) was a late 1920s American biplane, carrying four passengers plus mail. == Design and development == The LT-1 was a slightly enlarged version of the Stearman M-2 Speedmail with four passengers in an enclosed cabin and space for 500 lb (230 kg) of mail.
Source: Wikipedia "Stearman LT-1" · CC BY-SA 4.0
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