The Vultee V-11 and V-12 were American stressed-skin monocoque monoplane attack aircraft of the 1930s.
Developed from the Vultee V-1 single-engine airliner, the V-11 and V-12 were purchased by several nations for their armed forces, including China, who used them in combat against Japanese forces in the Second Sino-Japanese War.
The United States Army Air Corps purchased seven V-11s as the YA-19 in the years before World War II, testing them to gather data to compare against twin engine light attack aircraft.
In 1935, Vultee produced a light bomber derivative of their single-engined passenger transport, the Vultee V-1, which, while demonstrating good performance, was only sold in small numbers owing to restrictions placed on the use of single-engined aircraft for scheduled passenger transport operations.
The resulting aircraft, the Vultee V-11, retained the single-engined, low wing format and all-metal stressed skin structure of the V-1.
It combined a new fuselage with accommodation for the three crew members under a long greenhouse canopy with the wings and tail surfaces of the Vultee V-1.
First prototype fitted with 750 hp (560 kW) Wright SR-1820-F53 Cyclone driving a two-bladed Hamilton Standard controllable-pitch propeller, which crashed killing both pilot and the project engineer.
Second prototype, similar to first V-11, but with a three-bladed constant speed propeller.
Initial production two-seat light bomber.
Powered by an 850 hp (630 kW) Wright R-1820-G2 Cyclone engine.
30 built for China.
Three-seat version of V-11.
4 aircraft purchased by Soviet Union (2 as pattern aircraft), 40 by Turkey and others.
26 purchased by Brazil – generally similar to V-11-GB
Final example for Brazil fitted with floats, however it wasn’t accepted.
redesignation of V-11-GB for Turkey
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.
Production version of V-12 for China. Powered by R1820-G105B Cyclone engine.
26 built, one by Vultee and remaining 25 assembled in China.
Revised version with new fuselage and powered by 1,600 hp (1,200 kW) Wright R-2600 Cyclone 14 engine. 52 ordered for China, two pattern aircraft built by Vultee and 50 for local assembly.
Unbuilt observation design based on YA-19.
Variant of V-11-GB for United states Army Air Corps.
Seven examples built.
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.
The second YA-19 built was redesignated after being fitted with a Pratt & Whitney R-2800 radial engine as an engine test bed.
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.
The remaining five YA-19s were redesignated A-19 after assignment to active duty.
Soviet licensed armoured ground attack version.
Powered by 920 hp (690 kW) M-62.
Production stopped after at least 31 built.
Designation for BSh-1 when used by Aeroflot as light transport.
37 ft 10 in (11.53 m)
50 ft 0 in (15.24 m)
10 ft 0 in (3.05 m)
384 sq ft (35.7 m2)
6,452 lb (2,927 kg)
10,420 lb (4,726 kg)
Max take-off weight
16,285 lb (7,387 kg)
1 × Pratt & Whitney R-1830-17 Twin Wasp,
14-cylinder two-row air-cooled radial engine,
1,200 hp (890 kW)
3-bladed Hamilton Standard variable-pitch propeller
230 mph (370 km/h, 200 kn) at 6,500 ft (2,000 m)
207 mph (333 km/h, 180 kn)
Minimum control speed
80 mph (130 km/h, 70 kn)
1,110 mi (1,790 km, 960 nmi) with 1,080 lb (490 kg) of bombs
1,350 mi (2,170 km, 1,170 nmi)
20,500 ft (6,200 m)
Rate of climb
1,320 ft/min (6.7 m/s)
4 x forward-firing .30 in (7.62 mm) machine guns in wings
1 x dorsal .30 in (7.62 mm) machine gun
1 x ventral .30 in (7.62 mm) machine gun
6 x 30 lb (14 kg) in cells semi-recessed in wing centre section and 1,100 lb (500 kg) externally.