In 1933 Darwin F Swanson built the Swanson B-4-T N13619. A single-place open cockpit monoplane, it was powered by a 55hp Swanson engine, later, a 50hp Ford.
In 1933 Darwin F Swanson built the Swanson B-4-T N13619. A single-place open cockpit monoplane, it was powered by a 55hp Swanson engine, later, a 50hp Ford.