Originally built for an Army Attack Program, it was converted into an engineering test bed and then into a demonstrator and finally was used as a company executive aircraft.  This was the first Vought aircraft to have an enclosed cockpit.

Our records for the V-70 end with its use as an executive aircraft. However, information received from Spain report flight tests by the Spanish Air Force in Madrid with the V-70 in its land plane configuration. It was then flown to the San Javier Naval Base and configured as a seaplane. The Navy pilots at the base made several flight tests. On 30 April 1935 Navy Lieutenant La Cierva with Chief Naval Aeronautical Engineer Nardiz as observer flew it. The flight was made to conduct a high altitude performance test. Shortly after reaching the designated altitude, the V-70 caught fire and crashed about 300 meters from the beach, resulting in the death of both occupants. No cause for the accident was determined, but a carburation failure at high altitude was suspected.

Prior to the Spanish Civil War, Naval aviation was the Air Army of the Spanish Fleet, but was disbanded during the Civil War.