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Soviet Union's Tupolev SB-2, ANT-40 bomber

Photos

  • Toupolev SB-3 bomber
  • Toupolev SB-3 bomber
  • Toupolev SB-RK dive bomber
  • Toupolev SB-RK dive bomber
  • Toupolev SB-2 bomber

Design

Andrei Tupolev3 / A. N. Tupolev / Andrei N. Tuplev5 was the designer of the Tupolev SB-2 bomber (skorostnoi bombardirovshcik).1

The specifications for the design called for a fast bomber that could perform at least 50% better than other bombers.3

Construction

The skin of the SB-2 was of a stressed skin, all-metal construction.1,2,5

Prototype

The ANT-40 prototype flew on April 25, 19342 / October 7, 1934 / October 19345 for the first time.1,3 The second prototype first flew on December 30, 1934.3 The second and third prototypes flew in October 1934.2

The first prototype used two M.25 engines (copies of American Wright Cyclone).3 The second prototype had two M.100s (license built Hispano-Suiza).3

The first SB-2bis flew in October 1936.2

Production

Deliveries of the SB-2 began in early 1936.1,2

Production continued until 1942.1 Production of the SB-2bis went until late 1940.2

  • ANT-40 prototype: 25
  • Soviet Total: 6,5001, 6,6562, 6,6003, 6,9675
    • Manufacturer: State Industries3
    • Production: ? - 19413
  • Czechoslovakia Total B 71: 1112
    • Produced by Avia-Kasuta2

Variants

  • Tupolev ANT-40: Prototype.1,5 Had Wright Cyclone engines.2
  • Prototype #2 and #3: Had Hispano-Suiza 12Y V 12 engines.2
  • Tupolev SB-2: Had two VK-100 (copy of Hispano-Suiza 12Y) inline engines (750 HP).1
  • Tupolev SB-2bis: Had two M-100A engines (1,100 HP).1 Engine nacelles were redesigned.2 Additional fuel was carried.2
  • Tupolev PS-40: Civilian transport.2,5
  • Tupolev PS-41: Civilian transport.2,5
  • Tupolev SB-3: Crew trainer.2 Medium bomber.4
  • Tupolev ANT-41: Dive bomber.2
  • Tupolev SB-RK, Arkhangelskii Ar-2: Dive bomber.3,4,5 Had two M-105R supercharged engines.5
  • Tupolev ANT-46: Cannon fighter.2
  • Tupolev B 71: Czechoslovakian built.2

Usage

The SB-2 was used by Bulgaria3, China3,5 (~200), Czechoslovakia3,5 (53), Finland3, Germany, the Soviet Union3, and Spain5 (~200 / 2103).2

The SB-2 entered service in early 1936 / February 19365.3 The SB-2bis entered service in 1939.1

From 1944-1945 the SB-2s were used as night fighters.1

Payload to Height Record

In 1937 the SB-2 set a payload to height record of 2,205 lb / 1,000 kg to 40,177' / 12,246 m.2

Spanish Civil War

The SB-2s were successful in the Spanish Civil War as they could typically out fly the Nationalist fighters.1,3,5 The Republican forces nicknamed them "Katyusha."3

Chinese Air Force

The Chinese used SB-2s against the Japanese during 1938 - 1939.1 Most were lost during the second Sino-Japanese conflict.2

Winter War Against Finland

From 1939-1940 SB-2s were used against Finland during the Winter War.1,3,5 The harsh weather conditions caused many breakdowns of the liquid cooled engeines.1

Great Patriotic War

By the time Germany invaded in June 1941 the SB-2 was obsolete but it was still used as a night bomber.2,5

Secondary Role

Starting in 1943 most were used as trainers or target tugs.2

Specifications

  ANT-40
Engines 2: M-100 (Hispano-Suiza 12Ybr)5
HP 830 each5
Propeller Blades 2 fixed pitch5
Performance  
Speed 202 mph5
325 kph5
  Tupolev SB-2
Type Bomber3, Medium bomber2,5
Crew 32,3,5
Engine (Type) 2: M-1002,5
2: M-100A3
Cylinders V 122,3,5
Cooling Liquid3
HP 750 each2, 830 each3,5
Propeller Blades 3 each2
Dimensions  
Span 66' 8"3, 66' 8.5"2,5
20.33 m2,5
Length 40' 3"3, 40' 3.25"2,5
12.27 m2,5
Height 10' 8"2,3,5
3.25 m2,5
Wing area 559.2 sq ft5
51.95 sq m5
Weight  
Loaded 12,636 lb5, 12,637 lb3
5,732 kg5
Performance  
Speed at 13,120' 263 mph3
Speed at 13,125' / 4,000 m 255 mph5
410 kph5
Service ceiling 27,885'5, 31,200'3
8,500 m5
Range 745 miles3, 746 miles5
1,200 km5
Armament 4: MG3
Nose 2: 7.62 mm MG2
Turret - Dorsal 1: 7.62 mm MG2
2: 7.62 mm ShKAS MG5
Turret - Nose 2: 7.62 mm ShKAS MG5
Ventral position 1: 7.62 mm MG2
1: 7.62 mm ShKAS MG5
Bombs 1,320 lb3, 1,323 lb2, 2,205 lb5
600 kg2, 1,000 kg5
  Tupolev SB-2bis
Type Light bomber1, Medium bomber2
Crew 31,2
Engine (Type) 2: M-100A1
2: M-1032,3,5
Cylinders Inline1, V 122
Cooling Liquid1
HP 960 each2,3,5, 1,100 each1
Propeller blades 3 each2, 3 blade VISh-225
Dimensions  
Span 66' 8.5"1,2
20.33 m1,2
Length 40' 3.25"1,2
12.27 m1,2
Height 10' 8"1,2
3.25 m1,2
Wing area 559.2 ft2 1
51.95 m2 1
Weight  
Empty 8,818 lb1, 10,511 lb2
4,000 kg1, 4,768 kg2
Loaded 17,196 lb1, 17,372 lb2
7,800 kg1, 7,880 kg2
Performance  
Speed 280 mph2
450 kph2
Speed @ 14,765' /
4,500 m
280 mph1
450 kph1
Climb 1,310'/minute1,2
400 m/minute1,2
Service ceiling 25,590'2, 34,120'1
7,800 m2, 10,400 m1
Range 752 miles1
1,210 km1
Range with bomb load 745 miles2
1,200 km2
Maximum range 1,429 miles2
2,300 km2
Armament  
Nose 2: 7.62 mm MG2
2: 7.62 mm ShKAS MG1
Dorsal turret 1: 7.62 mm MG2
1: 7.62 mm ShKAS MG1
Ventral position 1: 7.62 mm MG2
1: 7.62 mm ShKAS MG1
Bombs 1,323 lb2
6: 222 lb1
600 kg2
6: 100 kg1
  Toupolev SB-3, Tupolev SB-3
Type Medium bomber4, Trainer2
Engine (Type) 2: M-1004
Cooling Liquid4
HP 1,100 each4
Dimensions  
Span 70' 6"4
Length 40'4
Performance  
Speed 280 mph4
  Toupolev SB-RK
Type Dive bomber
Engine (Type) 2: M-1004
Cooling Liquid4
HP 1,100 each4
Dimensions  
Span 70' 6"4
Length 40'4

Sources:

  1. Fighting Aircraft of World War II, Editor: Karen Leverington, 1995
  2. Aircraft of WWII, Stewart Wilson, 1998
  3. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
  4. Aeronautics Aircraft Spotters' Handbook, Ensign L. C. Guthman, 1943
  5. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
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