In early 1926 the Arado company built a so called "Streuflugzeug" = Crop Duster. It was a special low wing plane with a thick profile and a prominent V-shape, A.J.I.. The containers for the chemicals  was housed in the wings to achive a wide pattern of spraying and to avoid to hit the fuselage. This aircraft was however not further developed.
In 1929 a mockup for a single seat torpedo bomber, the J 1, was made with a similarity with the former crop duster. It should have a BMW engine. The low wing design was suitable for two torpedoes under the wing.. The attachments for the wingstruts were used for the suspension point for the torpedoes. This design was not demanded by the military. During the development work the cover name was "Streuflugzeug".

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