Soviet Union (2 as pattern aircraft), 40 by Turkey and others. V-11-GB2 26 purchased by Brazil – generally similar to V-11-GB V11-GB2F Final example for Brazil fitted with floats, however it wasn't accepted. V-11-GBT redesignation of V-11-GB for Turkey V-12 Revised version of three-seat bomber with refined aerodynamics and more power. One prototype flew in 1939 powered by Pratt & Whitney R-1830 Twin Wasp engine. V-12-C Production version of V-12 for China. Powered by R1820-G105B Cyclone engine. 26 built, one by Vultee and remaining 25 assembled in China. V-12-D Revised version with new fuselage and powered by Wright R-2600 Cyclone 14 engine. 52 ordered for China, two pattern aircraft built by Vultee and 50 for local assembly. V-52 Unbuilt observation design based on YA-19. USAAC Designations YA-19 Variant of V-11-GB for United states Army Air Corps. Seven examples built. YA-19A The last YA-19 was redesignated and completed as an engine test bed. Equipped with enlarged vertical stabilizer (for improve directional stability) and powered by Lycoming O-1230 (12-cylinder opposed) engine. YA-19B The second YA-19 built was redesignated after being fitted with a Pratt & Whitney R-2800 radial engine as an engine test bed. YA-19C The YA-19A was redesignated after being fitted with a Pratt & Whitney Twin Wasp R-1830-51 engine. Performance was similar to the YA-19. A-19 The remaining five YA-19s were redesignated A-19 after assignment to active duty. Soviet Designations BSh-1 Soviet licensed armoured ground attack version. Powered by M-62. Production stopped after at least 31 built. PS-43 Designation for BSh-1 when used by Aeroflot as light transport. Operators Brazilian Army Aviation – Vultee V-11-GB2 (25 delivered) Brazilian Air Force - aircraft transferred when Air Force created Republic of China Air Force 14th Squadron – Vultee V-11G (30), V-12C (25 delivered from order of 26, which was built but never delivered) & Vultee V-12D (52 delivered) Soviet Air Forces – Vultee V-11GB (4 delivered) & BSh-1 (31-35 built at Moscow Menzhinskii factory) Turkish Air Force 2nd Regiment – Vultee V-11GB (41 delivered) United States Army Air Corps – A-19/V-11GB (7 delivered) Specifications (Vultee XA-19) See also References Notes Citations Bibliography A-19 World War II ground attack aircraft of the United States A-19 Single-engined tractor aircraft Low-wing aircraft Aircraft first flown in 1935