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ANT-40 SB - Variants

Over the years of serial construction, the SB was repeatedly modernized, its creators, taking into account the operating experience, of the combat actions have constantly improved the car, trying to maintain its flight tactical characteristics at the proper level. Below is a brief information on some variants of the SC aircraft that have found application in the Air Force and Civil Air Fleet, as well as those remaining in the prototypes:

• ANT-40-1 or SB 2RTS (1934) - the first prototype with Wright Cyclone engines with a power of 730 hp.
• AHT-40-2 or SB 2IS (1934) - a prototype with engines Hispano-Suiza HS 12Y.power 780h.s.
• SB 2M-100 (1936-37) - the first production model. The wing area was increased to 56.7 m², the normal flight weight to 5628 kg, which led to a reduction in the maximum speed to 393 km / h. The Klimov M-100 engines with double-bladed propellers were installed on the aircraft.
• SB-2M100A (1936-38) , serial SB with M-100A engines with a capacity of 860 hp (642 kW) and with new engine hoods, series in 1937;
• SB-2M-100A with shielded turrets, an experimental aircraft created from the experience of using the first SBs in the Spanish War, was tested in 1937, until 1940 with similar turret installations (MV-2 and MV-3) separate serial machines were produced, only after the war with Finland began re-equipment of the system;
• SB-2M100A "cruiser", two copies with installation of four ShVAK cannons in the nose section, passed factory and ground tests, participated as night fighters in repelling raids on Moscow during the war;

Beginning in 1936, mass production of SBs began at plant No. 22, and from the following year the series unfolded at plant No. 125 in Irkutsk. Mass mass production of all-metal machines of this class became an event in the world and domestic aircraft manufacturing. The daily production of the aircraft reached 10-13 aircraft. In total, until the mass production was discontinued in 1941, 6,831 aircraft of various modifications were launched.

• SB-2M100A with six rocket guns RO-132, six serial machines, converted to RS-132 carriers, participated in the war with Finland;
• SB bis, an experimental aircraft with M-103 engines (960 hp) and frontal radiators and three-blade propellers VISh-2, was tested in 1937-1938;
• SB bis-2 (1938), an experimental aircraft with M-103 engines and frontal radiators, became the basis for the series; devices installed in the cockpit of the navigator - a serial modification with new front radiators, a smooth wing lining, a armored pilot and a reinforced glider design. The aircraft had propellers VISH-2, then VISH-22. The maximum bomb load has increased to 1600 kg, thanks to the external holders for bombs; The combat radius was 600 km.
• SB bis 3 (1937-1938) is an experimental modification with tunnel-type water radiators. The aircraft had the highest speed characteristics: 445 km / h at an altitude of 4,500 m, however, due to the unreliability of the radiators, it was not commercially built.
• SB 2M-103 or SB bis (1937) - a version with new M-103 engines with a power of 960 hp, a new navigator's cabin and a steerable tail wheel.
• SB-2M103, serial with frontal radiators with an increased margin of safety, external suspension assemblies for bombs and armored backboard, series in 1938 - 1939;
• SB-2M103 with tunnel radiators, serial, the fastest of the SB (450 km / h at 4100 m), a series of 1939-1940;
• SB-2M103 dive bomber, experimental;
• SB-2M103 (SN), experimental with super-fast machine guns SN;
• SB-2M103 "searchlight", one of the production aircraft equipped with searchlights to illuminate the enemy bombers, was used in Moscow’s air defense during the war;
• SB-2M103 "minesweeper", serially converted into an air minesweeper;
• SB-N, SB-2M103 with the installation of a mobile gun ShVAK instead of machine guns in the nose turret NU-SB;
• SB-Sh SB-2M103 converted into an experimental attack aircraft with two moving ShVAK cannons under the fuselage, the bomb load was 400 kg, the booking of the pilot’s and navigator’s cabs was enhanced;
• SB-UK (CSS), training SB-2M100A and SB-2M103, equipped with a special training booth, tests in the spring of 1938, completion of the system and a small series of SB-UK 2M103;
• SB-2M-104, a small series of SBs with M-104 engines and new weapons;
• SB-2M-105, a small series of SBs with M-105 engines and new weapons, released in 1940;
• SB-2M105 TK (TK-2), three serial SB-2M105 equipped with turbochargers were not in the series;
• SB-2M100 on floats, the 1934 draft of the float variant of the Security Council was not implemented;
• SB-2M103 with a three-wheeled chassis, an experimental aircraft, was tested in 1940-1941. in LII;
• Sa with the nose wheel (1940). - experimental aircraft created in one instance to study the advantages and disadvantages associated with the nose wheel arrangement.

• CSS (1938) - training version, was built in a small series. A cockpit instructor with parallel control and a full set

• PS-40 (1938) - the passenger version of the ANT-40 aircraft for Aeroflot, transferred to the Civil Air Fleet with the SB-2M100A weapon removed, were used as cargo;
• PS-41 (1939), modernized PS-40 with M-103U engines, the first aircraft was released by the plant N 89 GVF, then the similar modifications were made to SB-2M103, received from the Air Force, transferred to Aeroflot, converted into postal ones. The aircraft had external fuel tanks and could carry a payload of 2450 kg.
• PS-41bis, part of PS-41, equipped with additional outboard fuel tanks;
• B-71, licensed SB-2M100A, produced in Czechoslovakia since 1937, the machines were used in the Air Force of Czechoslovakia, Germany, Slovakia, Bulgaria and Finland;

• MMN (1939) - ("Maximum Modernization of the aircraft" N ") an experimental high-speed bomber with M-105 engines with a capacity of 1050 hp. improved aerodynamics, enhanced armament, and a smaller wing area. It was tested in 1939, was not transferred to the series Due to the inconsistency of flight characteristics given, the test aircraft did not pass.
• MMN-2M-104, "doubler" of MMN with engines M-104, experimental;
• SB-RK or Ar-2 - dive bomber development of the MMN equipped with two M-105P engines with a capacity of 1100 hp with air screws VISH-22E.The aircraft had a reduced wing area and a new nose section of the type of MMN, it was also equipped with air brakes and a dive-out automatic. The air heatsinks were inscribed in the wing console near the nacelle, and the outlets were located on the upper surface of the wing, with a maximum bomb load of 1,600 kg. The aircraft was in a series production before the start of the war, about 200 aircraft were built, replaced by dive bomber E-2.

• ANT-41 (T-1) ( 1936) - torpedo bomber on the basis of SB. It was not built in series.

• ANT-46 (DI-8) (1934) - Developing tactical ideas embodied in the ANT-21 (MI-3) and ANT-29 (DIP-1) projects, in the design bureau almost simultaneously with the work on the ANT-40 (SB) high-speed bomber, work was carried out on its fighter variant. It was not built in series.