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Tupolev SB



 
 
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Old April 28th 18, 02:37 PM posted to alt.binaries.pictures.aviation
Miloch
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Default 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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