BT-7

From World Of Tanks
Jump to: navigation, search


BT-7

Icon
USSR Light Tank Tier III
Battle Tiers
123456789101112
Totals
Cost 37,000  Credits
Hit Points 200220 HP
Weight Limit 14.1/14.214.31/15.5 t
Crew
Commander (Radio Operator)
Driver
Gunner (Loader)
Mobility
Engine Power 450480 hp
Speed Limit 66/20 km/h
Traverse 4850 deg/s
Power/Wt Ratio 31.9133.54 hp/t
Pivot NoNo
Armor
Hull Armor 20/15/13 mm
Turret Armor20/15/1520/15/15 mm
Armament
Damage 35.3-58.830-50 HP
Penetration 38-6444-73 mm
Rate of Fire
26.09100% crew: 27.2 rpm
+ Vents: 27.82 rpm
+ BiA : 28.43 rpm
+ Food: 29.66 rpm
28.57100% crew: 29.8 rpm
+ Vents: 30.47 rpm
+ BiA : 31.14 rpm
+ Food: 32.49 rpm
r/m
Accuracy
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
0.39100% crew: 0.37 m
+ Vents: 0.37 m
+ BiA : 0.36 m
+ Food: 0.34 m
m
Aim time
2.3100% crew: 2.21 s
+ Vents: 2.16 s
+ BiA : 2.11 s
+ Food: 2.02 s
1.9100% crew: 1.82 s
+ Vents: 1.78 s
+ BiA : 1.74 s
+ Food: 1.67 s
s
Turret Traverse
44100% crew: 45.89 deg/s
+ Vents: 46.92 deg/s
+ BiA : 47.96 deg/s
+ Food: 50.03 deg/s
46100% crew: 47.97 deg/s
+ Vents: 49.06 deg/s
+ BiA : 50.14 deg/s
+ Food: 52.31 deg/s
deg/s
Gun Arc 360°
Elevation Arc -8°/+25°-8°/+25°
Ammo Capacity 8484 rounds
General
Chance of Fire 2015 %
View Range
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
300100% crew: 300 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
m
Signal Range
300100% crew: 312.86 m
+ Vents: 319.93 m
+ BiA : 327 m
+ Food: 341.14 m
615100% crew: 641.36 m
+ Vents: 655.85 m
+ BiA : 670.35 m
+ Food: 699.34 m
m
Parent Contour-USSR-BT-2.png
Child
Contour-USSR-A-20.png3,200 XP
Research
RT-USSR-BT-7.jpg
Values are Stock - click for Top
USSR-BT-7.png

The BT-7 is a Soviet tier 3 light tank.

The BT-7 was a further modernization of the BT series, with a total of 5,556 vehicles of different variants produced from 1935 through 1940.

The BT-7 is a direct upgrade of the BT-2, offering even more speed and acceleration, more HP, and much better turning properties. It is one of the fastest tanks in the game, in exchange for very poor armor and relatively weak armament.

The BT-7 leads to the A-20.


















Modules

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
02II BT-7 mod. 1935 0020 20/15/15 mm
44100% crew: 45.89 deg/s
+ Vents: 46.92 deg/s
+ BiA : 47.96 deg/s
+ Food: 50.03 deg/s
44100% crew: 45.89 deg/s
+ Vents: 46.92 deg/s
+ BiA : 47.96 deg/s
+ Food: 50.03 deg/s
d/s
360°
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
m
0------ 000000750750 Credits 0950 950 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
02II 45 mm 20K 84 47/47/62 HP 51/88/23 mm 14 Credits/2 Gold/14 Credits
26.09100% crew: 27.2 rpm
+ Vents: 27.82 rpm
+ BiA : 28.43 rpm
+ Food: 29.66 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
2.3100% crew: 2.21 s
+ Vents: 2.16 s
+ BiA : 2.11 s
+ Food: 2.02 s
s
-8°/+25° --- 2,5302,530 Credits 0250 250 kg
02II 23 mm VJa 300 12/12 HP 30/42 mm 4 Credits/2 Gold
105.88100% crew: 108.91 rpm
+ Vents: 110.54 rpm
+ BiA : 112.15 rpm
+ Food: 115.29 rpm
Autocannon

Burst Length: 3 rounds
Magazine Size: 12 rounds
Magazine RoF: 300 rpm
Magazine Reload Time: 4.6 s

Click here for more information.
r/m
0.54100% crew: 0.52 m
+ Vents: 0.51 m
+ BiA : 0.5 m
+ Food: 0.47 m
m
1.7100% crew: 1.63 s
+ Vents: 1.59 s
+ BiA : 1.56 s
+ Food: 1.49 s
s
-8°/+25° 140 2,7502,750 Credits 0071 71 kg

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
03III BT-7 mod. 1937 0020 20/15/15 mm
46100% crew: 47.97 deg/s
+ Vents: 49.06 deg/s
+ BiA : 50.14 deg/s
+ Food: 52.31 deg/s
46100% crew: 47.97 deg/s
+ Vents: 49.06 deg/s
+ BiA : 50.14 deg/s
+ Food: 52.31 deg/s
d/s
360°
300100% crew: 280 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
300100% crew: 280 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
m
0325325 1,7301,730 Credits 1,050 1,050 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
02II 45 mm 20K 84 47/47/62 HP 51/88/23 mm 14 Credits/2 Gold/14 Credits
26.09100% crew: 27.2 rpm
+ Vents: 27.82 rpm
+ BiA : 28.43 rpm
+ Food: 29.66 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
1.9100% crew: 1.82 s
+ Vents: 1.78 s
+ BiA : 1.74 s
+ Food: 1.67 s
s
-8°/+25° --- 2,5302,530 Credits 0250 250 kg
02II 23 mm VJa 300 12/12 HP 30/42 mm 4 Credits/2 Gold
110.77100% crew: 113.86 rpm
+ Vents: 115.53 rpm
+ BiA : 117.17 rpm
+ Food: 120.37 rpm
Autocannon

Burst Length: 3 rounds
Magazine Size: 12 rounds
Magazine RoF: 300 rpm
Magazine Reload Time: 4.3 s

Click here for more information.
r/m
0.54100% crew: 0.52 m
+ Vents: 0.51 m
+ BiA : 0.5 m
+ Food: 0.47 m
m
1.6100% crew: 1.53 s
+ Vents: 1.5 s
+ BiA : 1.47 s
+ Food: 1.41 s
s
-8°/+25° 140 2,7502,750 Credits 0071 71 kg
03III 37 mm ZiS-19 84 40/40/50 HP 58/92/19 mm 35 Credits/2 Gold/35 Credits
28.57100% crew: 29.8 rpm
+ Vents: 30.47 rpm
+ BiA : 31.14 rpm
+ Food: 32.49 rpm
r/m
0.39100% crew: 0.37 m
+ Vents: 0.37 m
+ BiA : 0.36 m
+ Food: 0.34 m
m
1.9100% crew: 1.82 s
+ Vents: 1.78 s
+ BiA : 1.74 s
+ Food: 1.67 s
s
-8°/+25° 160 4,2504,250 Credits 0200 200 kg

Engine
TierNamePowerFire ChanceTypeXP CostPriceWeight
04IV M-17T 0450 450 hp 020 20 % Gasoline --- 10,77010,770 Credits 0610 610 kg
04IV M-17F 0500 500 hp 020 20 % Gasoline 850 13,46013,460 Credits 0610 610 kg
05V V-2 0480 480 hp 015 15 % Diesel 1,250 18,75018,750 Credits 0750 750 kg

Suspension
TierNameLoad LimitTraverse SpeedXP CostPriceWeight
02II BT-5 14.214.2 t 04848 d/s ------ 000000600600 Credits 4,000 4,000 kg
03III BT-7 15.515.5 t 05050 d/s 315315 1,7001,700 Credits 4,000 4,000 kg

Radio
TierNameRangeXP CostPriceWeight
03III 71-TK-3
300100% crew: 312.86 m
+ Vents: 319.93 m
+ BiA : 327 m
+ Food: 341.14 m
300100% crew: 312.86 m
+ Vents: 319.93 m
+ BiA : 327 m
+ Food: 341.14 m
m
0--- --- 000000570570 Credits 0100 100 kg
09IX 12LL
615100% crew: 641.36 m
+ Vents: 655.85 m
+ BiA : 670.35 m
+ Food: 699.34 m
615100% crew: 641.36 m
+ Vents: 655.85 m
+ BiA : 670.35 m
+ Food: 699.34 m
m
5,600 5,600 33,60033,600 Credits 0110 110 kg

Historical Info

Early variant of the BT-7 tank

The BT-7 was the last of the BT tank series of Soviet cavalry tanks that were produced in large numbers between 1935 and 1940. They were lightly armored, but reasonably well-armed for their time, and had much better mobility than other contemporary tank designs. The BT tanks were known by the nickname Betka from the acronym, or its diminutive Betushka. BT (Russian: БТ) stands for fast tank (Быстроходный танк, Bystrokhodny tank). The successor of the BT-7 Tank would be the famous T-34 medium tank, introduced in 1940, which would replace all of the Soviet fast tanks, infantry tanks, and medium tanks then in service.

Development history

The first prototypes of the BT-7 had a distinctive canted-ellipse shaped turret mounting both the main gun and a coaxial machine-gun. The specification also called for the project to allow for installation without any significant change to the framework of new guns: the 76 mm CT or PS-3 main gun (a short-barreled howitzer) and the 45 mm 20K model 1932/38, a long-barreled, high-velocity gun useful against tanks, but less effective than the 76 mm gun against infantry.

In the rear of the turret, there was housed a rotating drum-type magazine for 18 76 mm shells or a radio station. The prototype underwent an extensive testing program in the summer and autumn of 1934. As a result of this testing, it was felt that a machine-gun was unnecessary on a tank with a 3-man crew, especially as it made the assembly of the turret more complicated.
BT-7-2 Training turret at Stalin Military Academy

Therefore, in early 1935, the tank went into production with a simpler design, incorporating the turret from the BT-5. (However, the idea of wheeled/tracked vehicle with a 76 mm cannon was not abandoned and the plant was commissioned to develop a new BT-7 turret from the turret of the T-26-4). In the production model, a cylindrical turret housed a 45 mm 20K gun with a DT-model machine-gun. On some of the tanks, a model 71-TC radio with frame antenna was installed. The crew consisted of three men: the commander (who also served as the gunner), the loader, and the driver. In 1937, the company launched production of the BT-7 with a conical turret. Main armament remained the same, but the ammunition was increased to 44 rounds. All serving tanks now installed the DT machine gun in the rear niche. For the firing of the gun and coaxial machine gun at night, the tank was equipped with two special projector-type headlamps, and a mask placed on the gun. Subsequently, these Lights were retrofitted to earlier models of the tank. Improvements were also made to the drive wheels, caterpillar tracks, and gearbox by 1938. In parallel with the main modification, 154 BT-7A artillery tanks were produced between 1936 and 1938, fitted with a larger turret and a 76 mm CT-type gun, with 50 rounds of ammunition (40 in a tank with a portable radio). In 1938, four experimental BT-8 tanks mounted with V-2 diesel engines were produced. After comparative tests of the BT-7 and BT-8, the diesel tanks were put into production in 1940 (under the designation BT-7M) with the powerplants being produced in a separate plant of the Voroshilovets factory to ensure supply. From December 1939, the BT-7A went into production with some minor modifications; additional bracing for rigidity, a manhole underneath, and a smaller air filter. The diesel-powered tanks showed much-reduced fuel costs, and the petrol tanks were soon placed into reserve.

BT-7 M on wheels; 1940.jpg

Several experimental tanks were conceived based on the BT series, for example: the wheeled BT-IC, designed by NF Tsyganova, a platoon commander in the 4th Armoured Regiment of the Ukraine Military District and self-taught designer. The type successfully passed field tests, but was not ordered in bulk. Another Tsyganova design was the S-2 "Turtle", with a new design of hull and turret. There was also the command tank CBT-7 with a fixed turret, the OT-7 mounting aflamethrower, the HBT-7 designed to protect from toxic contamination and lay smokescreens, the PBT bridgelayer, and the TTBT-7 and Thubten-7 radio-controlled tanks (known at the time as Teletanki). Shortly before Operation Barbarossa, the BT-7 underwent an up-armor program. In 1940, Mariupol Ilyich Iron and Steel Works produced 50 sets of hinged homogeneous armor for the BT-7M, which increased the weight of the test tank to 18 tons. On the installation of these kits to military units, unfortunately, nothing is known.

Combat history

BT-7 and T-26 with_additional armor are moving to the frontline. 5th Tank Brigade Western Front, Nov.1941.

Between 1935 and 1940, between 2700 to 5328 BT-7 tanks of all modifications (except BT-7A) were built. They were operated by the armored and mechanized forces of the Red Army for almost the entire war. Over 2000 BT-7 series tanks were lost in the first 12 months on the Eastern Front. Hundreds had been immobilized even before the invasion by poor maintenance, and had to be abandoned as all Soviet forces withdrew eastward. The survivors fought against the Wehrmacht in numbers gradually reduced by attrition, until superseded by more modern types in 1944. The BT-7 series continued in use elsewhere, including being used against Japanese forces (Battle of Khalkhyn Gol and Manchurian Strategic Offensive Operation) in Manchuria in 1945.


Comparison of the BT-2, BT-5, BT-7, BT-7A, and BT-8
BT-2 BT-5 BT-7 BT-7A BT-7M (BT-8)
Number built 620 2,108 4,965 154 790
crew 3 3 3 3 3
weight 10.2 t 11.5 t 14 t 14.5 t 14.7 t
length 5.58 m 5.58 m 5.66 m 5.66 m 5.66 m
width 2.23 m 2.23 m 2.29 m 2.29 m 2.29 m
height 2.20 m 2.25 m 2.42 m 2.52 m 2.42 m
armour 6–13 mm 6–13 mm 6–13 mm 6–13 mm 6–22 mm
main gun 37 mm
Model 30
45 mm
Model 32
45 mm
Model 35
76.2mm
Model 27/32
45 mm
Model 38
main gun
ammunition
96 rounds 115 rouds 146 rounds 50 rounds 146 rounds
machine guns DT DT DT 2×DT 3×DT
engine power
model
400 hp
Liberty
400 hp
M-5
500 hp
M-17T
500 hp
M-17T
450 hp
V-2
fuel 400 l
gasoline
360 l
gasoline
620 l
gasoline
620 l
gasoline
620+170 l
diesel
road speed 100 km/h (62 mph) 72 km/h (45 mph) 86 km/h (53 mph) 86 km/h (53 mph) 86 km/h (53 mph)
power:weight 39 hp/t 35 hp/t 36 hp/t 34 hp/t 31 hp/t
road range 300 km 200 km 250 km 250 km 700 km
tactical range 100 km 90 km 120 km 120 km 400 km
Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox
In other languages