The majority of U.S. pilots of World War II received their primary flight training in the famous Stearman Trainer. This excellent 2-place biplane was known as the PT-17 when delivered to Army flight training centers. The Navy designations were N2S-1 and N2S-4. Nearly 3,000 were built in the 1940-43 period and, in the post war era and up to modern times, the Stearman Trainer has been successfully used as a stunt plane and crop duster.