 Given the location at the airfield, it appears he may have been planning to start aircraft production at Speyer as well.Over the next five years, 3,800 Heinkelkabine's were produced at the Speyer plants, reaching 50 a day.However, Heinkel's death in 1958 ended any plans for expansion into aircraft, and in 1961 the two assembly lines were sold off to Ireland and Argentina.