This was an attack-bomber development of the V-1 airliner. Normally, it had a radial engine and a tail fin similar to the V-1. The one in the photo is the XA-19A version, with an experimental 1200hp Lycoming inline engine and extended tail fin.
Although many of these V-11 aircraft were exported, the Army Air Corps rejected it after a few were service-tested briefly. It is probably just as well that they did, because this would probably have turned out to be the U.S. equivalent of the RAF's Fairey Battle. The Army Air Corps decided that they preferred larger, twin-engine, aircraft for this particular combat role, such as the Douglas A-20 Havoc.