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Tupolev SB
https://en.wikipedia.org/wiki/Tupolev_SB
The Tupolev ANT-40, also known by its service name Tupolev SB (Russian: – Skorostnoi Bombardirovschik – high speed bomber) and development co-name TsAGI-40, was a high speed twin-engined three-seat monoplane bomber, first flown in 1934. The Tupolev design was advanced but lacked refinement, much to the dismay of crews, maintenance personnel and of Stalin, who pointed out that "there are no trivialities in aviation". Numerically the most important bomber in the world in the late 1930s, the SB was the first modern stressed skin aircraft produced in quantity in the Soviet Union and probably the most formidable bomber of the mid-1930s. It was produced in the Soviet Union and was also built under license in Czechoslovakia. Many versions saw extensive action in Spain, the Republic of China, Mongolia, Finland and at the beginning of World War II against Germany in 1941. It was also used in various duties in civil variants, as trainers and in many secondary roles. Successful in the Spanish Civil War because it outpaced most fighters, the aircraft was obsolete by 1941. By June 1941, 94 percent of bombers in the Red Army air force (VVS RKKA) were SBs. The SB was an all-metal monoplane powered by two Klimov M-100 12-cylinder water-cooled engines (license production version of Hispano-Suiza 12-Yrds engine) which drove fixed-pitch two-bladed metal propellers. The engines were provided with honeycomb-type frontal radiators enclosed by vertical thermostat-controlled cooling shutters. At an early production stage, the M-100 engine gave place to an improved M-100A engine, driving ground-adjustable three-pitch propellers, with speed being boosted to 423 km/h (263 mph) at 4,000 m (13,000 ft). Because of its broad, high aspect ratio wing, that gave it a good altitude performance – Soviet crews nicknamed the SB the "Pterodactyl". Role Fast bomber Manufacturer Tupolev Designer Alexander Arkhangelsky First flight 7 October 1934 Introduction 1936 Retired 1950 (Spanish Air Force) Primary users Soviet Air Forces Czechoslovak Air Force Chinese Nationalist Air Force Luftwaffe Produced 1936–1941 Number built 6,656 There were a number of foreign customers for the SB. They were mostly satisfied with the aircraft's performance. There were some complaints about the high noise level, cramped crew compartments, hard undercarriage suspension and in particular about the front gunner's position, which could be reached only through a hatch under the fuselage, preventing the gunner from escaping in the event of a ditching or belly landing. Czechoslovakia signed an agreement to produce ANT-40 as Avia B-71. Specifications (SB 2M-103) General characteristics Crew: 3 Length: 12.57 m (41 ft 2¾ in) Wingspan: 20.33 m (66 ft 8 in) Height: 3.60 m (11 ft 9¾ in) Wing area: 56.7 m² (610.3 ft2) Empty weight: 4,768 kg (10,512 lb) Loaded weight: 6,308 kg (14,065 lb) Max. takeoff weight: 7,880 kg (17,370 lb) Powerplant: 2 × Klimov M-103 liquid-cooled V12 engine, 716 kW (960 hp) each Performance Maximum speed: 450 km/h (243 knots, 280 mph) at 4,100 m (13,450 ft) Range: 2,300 km (1,243 nmi, 1,429 mi) Service ceiling: 9,300 m (30,510 ft) Climb to 1,000 m (3,280 ft): 1.8 min Climb to 9,000 m (29,500 ft): 32 min Armament Guns: 4 × 7.62 mm ShKAS machine guns (two in nose, one in dorsal and one in ventral position) Bombs: 6 × 100 kg (220 lb) or six 50 kg (110 lb) bombs in bomb-bay, 2 × 250 kg (550 lb) bombs on wing racks * |
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