The Arado S I was a biplane trainer built in Germany in 1925.

The first of three prototypes was powered by a Bristol Lucifer radial engine, while the other two Arado S.Ia aircraft were fitted with the Siemens-Halske Sh 12.

The Siemens-Halske Sh 11 powered the Arado S III, a virtually identical aircraft of which only a single prototype was constructed and sold to Turkey.

Data from Jane's all the World's Aircraft 1928,[1] German Aviation 1919-1945:Arado S III[2]General characteristics Performance