The Ago S.I was a single seat ground attack aircraft that was still under development at the end of the First World War.
The S.I is a fairly obscure aircraft. Two were under construction at the end of the war, but neither was completed before the Armistice.
The S.I was a two bay biplane. It used an advanced split undercarriage, braced to the base and sides of the fuselage. Its Bass und Selve BuS III engine drove a two blade propeller.
The S.I was to be armed with two Spandau machine guns and a 2cm cannon. The detail of the gun installation isn't clear, and it is possible that some of the guns might have been downwards firing.
Engine: Basse und Selve BuS III
Armament: Two Spandau machine guns, one 2cm cannon