Martin S

The Martin S was a two-seat observation seaplane produced by the Glenn L. Martin Company in the United States in 1915, designed along the same general lines as the preceding Model T. It was a largely conventional two-bay biplane with unstaggered wings of equal span, a single large pontoon beneath the fuselage and outrigger floats near the wingtips, and it was 23-year-old Donald Douglas's first and only design for the Martin company. The type set three world altitude records and a flight duration record that stood for three years. Six, possibly fourteen, were operated by the US Army Signal Corps and two by the Navy, and the Army aircraft served at Fort Mills on Corregidor from 1916, using radio to adjust Coast Artillery fire.