A ranar 27 ga watan Mayu 1935, an tashi samfurin zuwa Wright Field, Ohio, don yin gasa a cikin jirgin saman USAAC don sabon jirgin saman soja guda ɗaya, amma an jinkirta gasar saboda shigarwar Seversky ya fadi a kan hanyarsa. Curtiss ya yi amfani da jinkirin don maye gurbin injin da ba shi da tabbaci tare da Wright XR-1820-39 Cyclone wanda ke samar da 950 hp (710 kW) kuma ya sake yin fuselage, yana ƙara windows na baya na baya don inganta ganuwa.
1936 shekara