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T21

T21

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T21

AnnoA71_T21.png
USA | Light Tank | Tier VI
Battle Tier
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Overview
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▲
Well, the ones further down, of course.
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[Client Values; Actual values in
▲
Specifically, the mismatch in crew values caused by commander's 10% crew skill bonus. Outside of a crew of 1 commander only, 100% crew is a fiction. The client values, given for 100% crew, will normally be taken into battle with 110% crew skill members aside from specific functions, causing their actual performance to deviate from the expected client value. These differences are taken into account in tooltip boxes.
]
900,000  Credits Cost
670134 HP Hit Points
23.15/23.212.29/26 t Weight Limit
Crew
  1. Commander
  2. Gunner
  3. Driver
  4. Radio Operator
  5. Loader
Mobility
550600 hp Engine Power
57/21 km/h Speed Limit
5860 deg/s Traverse
23.7648.82 hp/t Power/Wt Ratio
NoNo Pivot
Armor
// mm Hull Armor
28.6/25.4/25.428.6/25.4/25.4 mm Turret Armor
Armament







{{#ifeq:ARMOR_PIERCING_CR|ARMOR_PIERCING||



{{#ifeq:HIGH_EXPLOSIVE|ARMOR_PIERCING||


AP/APCR/HE







{{#ifeq:ARMOR_PIERCING_CR|ARMOR_PIERCING||



{{#ifeq:HIGH_EXPLOSIVE|ARMOR_PIERCING||


AP/APCR/HE
 Shells




















96/2800/68




















96/2800/68
 Shell Cost
115/115/185115/115/185 HP Damage
120/177/38130/177/38 mm Penetration



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13.33 r/m 
▲

Standard Gun

Reload Times
Nominal: 4.5 s
50% Crew: 5.57 s
75% Crew: 4.87 s
100% Crew: 4.31 s
Rammer: 3.88 s
Vents: 4.22 s
Both: 3.79 s
Both and BiA: 3.71 s
Both and Max Crew %: 3.56 s

See Crew, Consumables, or Equipment for more information.



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14.29 r/m 
▲

Standard Gun

Reload Times
Nominal: 4.2 s
50% Crew: 5.2 s
75% Crew: 4.54 s
100% Crew: 4.03 s
Rammer: 3.63 s
Vents: 3.94 s
Both: 3.55 s
Both and BiA: 3.47 s
Both and Max Crew %: 3.33 s

See Crew, Consumables, or Equipment for more information.
 Rate of Fire






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1532.95
▲

Standard Gun

Using Shell Type 1 (115 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1532.95
50% Crew: 1237.4
75% Crew: 1416.8
100% Crew: 1598.5
100% Crew
Vents: 1634.15
Rammer: 1775.6
Both: 1815.85
Both and BiA: 1856.1
Both and Max Crew %: 1936.6

Advantageous Damage Per Minute
First-shot DPM: 1647.95
50% Crew: 1352.4
75% Crew: 1531.8
100% Crew: 1713.5
100% Crew
Rammer: 1890.6
Vents: 1749.15
Both: 1930.85
Both and BiA: 1971.1
Both and Max Crew %: 2051.6

See here, here, or here for more information.
▼

Standard Gun

Using Shell Type 2 (115 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1532.95
50% Crew: 1237.4
75% Crew: 1416.8
100% Crew: 1598.5
100% Crew
Vents: 1634.15
Rammer: 1775.6
Both: 1815.85
Both and BiA: 1856.1
Both and Max Crew %: 1936.6

Advantageous Damage Per Minute
First-shot DPM: 1647.95
50% Crew: 1352.4
75% Crew: 1531.8
100% Crew: 1713.5
100% Crew
Rammer: 1890.6
Vents: 1749.15
Both: 1930.85
Both and BiA: 1971.1
Both and Max Crew %: 2051.6

See here, here, or here for more information.
▲

Standard Gun

Using Shell Type 3 (185 Damage):
With wholly penetrating hits

Theoretical Damage Per Minute
Nominal DPM: 2466.05
50% Crew: 1990.6
75% Crew: 2279.2
100% Crew: 2571.5
100% Crew
Vents: 2628.85
Rammer: 2856.4
Both: 2921.15
Both and BiA: 2985.9
Both and Max Crew %: 3115.4

Advantageous Damage Per Minute
First-shot DPM: 2651.05
50% Crew: 2175.6
75% Crew: 2464.2
100% Crew: 2756.5
100% Crew
Rammer: 3041.4
Vents: 2813.85
Both: 3106.15
Both and BiA: 3170.9
Both and Max Crew %: 3300.4

See here, here, or here for more information.






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1643.35
▲

Standard Gun

Using Shell Type 1 (115 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1643.35
50% Crew: 1327.1
75% Crew: 1519.15
100% Crew: 1713.5
100% Crew
Vents: 1752.6
Rammer: 1904.4
Both: 1946.95
Both and BiA: 1989.5
Both and Max Crew %: 2075.75

Advantageous Damage Per Minute
First-shot DPM: 1758.35
50% Crew: 1442.1
75% Crew: 1634.15
100% Crew: 1828.5
100% Crew
Rammer: 2019.4
Vents: 1867.6
Both: 2061.95
Both and BiA: 2104.5
Both and Max Crew %: 2190.75

See here, here, or here for more information.
▼

Standard Gun

Using Shell Type 2 (115 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1643.35
50% Crew: 1327.1
75% Crew: 1519.15
100% Crew: 1713.5
100% Crew
Vents: 1752.6
Rammer: 1904.4
Both: 1946.95
Both and BiA: 1989.5
Both and Max Crew %: 2075.75

Advantageous Damage Per Minute
First-shot DPM: 1758.35
50% Crew: 1442.1
75% Crew: 1634.15
100% Crew: 1828.5
100% Crew
Rammer: 2019.4
Vents: 1867.6
Both: 2061.95
Both and BiA: 2104.5
Both and Max Crew %: 2190.75

See here, here, or here for more information.
▲

Standard Gun

Using Shell Type 3 (185 Damage):
With wholly penetrating hits

Theoretical Damage Per Minute
Nominal DPM: 2643.65
50% Crew: 2134.9
75% Crew: 2443.85
100% Crew: 2756.5
100% Crew
Vents: 2819.4
Rammer: 3063.6
Both: 3132.05
Both and BiA: 3200.5
Both and Max Crew %: 3339.25

Advantageous Damage Per Minute
First-shot DPM: 2828.65
50% Crew: 2319.9
75% Crew: 2628.85
100% Crew: 2941.5
100% Crew
Rammer: 3248.6
Vents: 3004.4
Both: 3317.05
Both and BiA: 3385.5
Both and Max Crew %: 3524.25

See here, here, or here for more information.
 Damage Per Minute


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0.41 m 
▲

With 50% Crew: 0.508 m
With 75% Crew: 0.443 m
With 100% Crew: 0.393 m
With BiA: 0.384 m
With BiA and Vents: 0.376 m
Maximum possible: 0.361 m

For more details, see Crew


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0.36 m 
▲

With 50% Crew: 0.446 m
With 75% Crew: 0.389 m
With 100% Crew: 0.345 m
With BiA: 0.338 m
With BiA and Vents: 0.33 m
Maximum possible: 0.317 m

For more details, see Crew
 Accuracy


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2.3 s 
▲

With 50% Crew: 2.849 s
With 75% Crew: 2.488 s
With 100% Crew: 2.205 s
With GLD: 2.005 s
With BiA: 2.157 s
With BiA and Vents: 2.11 s
With both and GLD: 1.918 s
Maximum possible: 1.839 s

For more details, see Crew or Equipment


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1.9 s 
▲

With 50% Crew: 2.354 s
With 75% Crew: 2.055 s
With 100% Crew: 1.822 s
With GLD: 1.656 s
With BiA: 1.782 s
With BiA and Vents: 1.743 s
With both and GLD: 1.584 s
Maximum possible: 1.519 s

For more details, see Crew or Equipment
 Aim time
4242 deg/s Turret Traverse
360° Gun Arc
-10°/+25°-10°/+25° Elevation Arc
7070 rounds Ammo Capacity
General
2020 % Chance of Fire






380 m 
▲

With 50% Crew: 298.6 m
With 75% Crew: 339.3 m
With 100% Crew: 380 m
With Recon and Situational Awareness: 399.2 m
With Coated Optics: 418 m
With Binocular Telescope: 475 m
Maximum possible: 544 m

For more details, see Skills or Equipment






380 m 
▲

With 50% Crew: 298.6 m
With 75% Crew: 339.3 m
With 100% Crew: 380 m
With Recon and Situational Awareness: 399.2 m
With Coated Optics: 418 m
With Binocular Telescope: 475 m
Maximum possible: 544 m

For more details, see Skills or Equipment
 View Range


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410 m 
▲

With 50% Crew: 331 m
With 75% Crew: 379 m
With 100% Crew: 427.6 m
With 100% Signal Boost: 492 m
When affected by 100% Relaying: 451 m
Maximum possible: 615.5 m

For more details, see Skills or Equipment


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745 m 
▲

With 50% Crew: 601.4 m
With 75% Crew: 688.8 m
With 100% Crew: 777 m
With 100% Signal Boost: 894 m
When affected by 100% Relaying: 819.5 m
Maximum possible: 1118.4 m

For more details, see Skills or Equipment
 Signal Range
Values are Stock - click for Top
T21

Additional Statistics
(Top Configuration)

Camouflage

  • Stationary: 15.4%
  • When Moving: 15.4%
  • When Firing: 4.3%


Terrain Resistance

  • On Hard Ground: 0.86
  • On Medium Ground: 0.96
  • On Soft Ground: 1.63


Dispersion Change Values

  • Turret Contribution
  • Rotation: 0.12
  • Shot Recoil: 3.36
  • Suspension Contribution
  • Acceleration: 0.13
  • Turning: 0.13


With 100% Crew

VI

AnnoA71_T21.png

900000

The T21 is an American tier 6 light tank.

A lightweight version of the T20 medium tank with the M7 elongated chassis. The vehicle was developed in the first half of 1943. Unlike the T20 tank, the T21 featured reduced armor and lighter armament. The vehicle never entered mass production nor saw service.

The T21 is a lighter variant of the T20 medium tank. It has good maneuverability & a great view range, on top of having a good power to weight ratio. Additionally, it uses the same gun as the M4 E8/E2, having rather low penetration in exchange for a high rate of fire & great handling.

The T21 marks the end of its American light line.

Modules / Available Equipment and Consumables

Modules

Ico_gun_alpha.png

Guns

Tier Gun Penetration
(mm) 		Damage
(HP) 		Rate of fire
(rounds/minute) 		Dispersion
(m/100m) 		Aiming time
(s) 		Weight
(kg) 		Price
(Credits)

VI 76 mm Gun M1A2L 130/177/38 115/115/185 14.29 0.36 1.9 1590 61500
VI 76 mm Gun M1A1L 120/177/38 115/115/185 13.33 0.41 2.3 1567 50100

Ico_engine_alpha.png

Engines

Tier Engine Engine Power
(hp) 		Chance of Fire on Impact
(%) 		Weight
(kg) 		Price
(Credits)

VII Ford GAN A 600 20 569 39400
VI Ford GAA A 550 20 569 36000

Ico_suspension_alpha.png

Suspensions

Tier Suspension Load Limit
(т) 		Traverse Speed
(gr/sec) 		Rmin Weight
(kg) 		Price
(Credits)

V VVSS T48M1A1 23.2 58 B/2 5300 8300
VI VVSS T48M1A2 26 60 B/2 5300 16000

Ico_radio_alpha.png

Radios

Tier Radio Signal Range
(m) 		Weight
(kg) 		Price
(Credits)

X SCR 528 745 80 54000
VI AN/GRC-3 410 120 21600

Compatible Equipment

Low Noise Exhaust System Class 2 Vertical Stabilizer Class 2 Light Spall Liner Camouflage Net Class 2 Coated Optics Class 2 Stabilizing Equipment System Experimental Optics Wear-Resistant Gun Laying Drive Improved Configuration Venting System Innovative Loading System Enhanced Gun Laying Drive Class 2 Improved Hardening Class 2 Additional Grousers Class 2 Modified Configuration Class 2 Improved Rotation Mechanism Class 2 Improved Aiming Class 2 Improved Ventilation Class 3 Binocular Telescope Class 2 Gun Rammer Class 2 Turbocharger Class 2 

Compatible Consumables

Stabilizer Greasing Automatic Fire Extinguisher Natural Cover Optical Calibration Case of Cola Aim Tuning Experienced Firefighters 100-octane Gasoline 105-octane Gasoline Manual Fire Extinguisher Pre-Battle Maintenance Vent Purge Large First Aid Kit Large Repair Kit Duty Comes First Shell Organizer Orderly Ammo Rack Focus on Target Increased Focus Small First Aid Kit Small Repair Kit Gearbox Intricacy Steady Hand Combat Course 


Player Opinion

Pros and Cons

Pros:


  • Good view range (tied for 2nd best out of Tier 6 lights with VK 28.01)
  • Decent camo rating makes a great passive or active scout with binos or optics
  • Nice penetration & RoF on the top gun, its gun handling surpasses even the famous Easy Eight
  • Excellent hp/weight ratio & very high traverse gives this scout tank good mobility & speed
  • Decent peek-a-boo flanker


Cons:


  • Poor armor even for a light tank, exceptionally vulnerable to HE shells
  • Worst top speed of all Tier 6 light tanks (by 3 Km/h), racing for scout spots can be difficult


Performance

As with any tank, equipment improves the effectiveness of the T21. It is recommended to combine (or mix & match as preferred) equipment to these main playstyles:

Scout: Camouflage Net, Binoculars, (choice is yours, recommend Coated Optics) In this role, you'll play more passive than active scouting. The T21 doesn't have the speed or low profile to play an active scout, so guerrilla tactics are important here; hence the Net and Binoculars.

Flanker: Gun Rammer/Coated Optics, Vertical Stabilizer, & Vents. This will let you use that sweet M1A2 at will. Play always in & with support & you can lay some serious damage on the enemy. However, do be aware you won't last nearly as long as mediums do while trying to function in the same role as them. Coated Optics might help you if you choose this set up, as it allows you to become a deadly Artillery Hunter, finding & eliminating any SPGs.

A more balanced setup would use binoculars, a rammer, & a vertical stabilizer. This setup will maximize your flexibility & allow you to fulfill multiple roles. This will maximize your DPM & ability to fire accurately on the move. Of note is the T21's ability to fire accurately on the move; this is great for chasing other tanks or for flanking.


Early Research

  • Neither the 76 mm Gun M1A2L nor the Ford GAN A Engine require the upgraded suspension, so research them in whichever order you want to.
  • Finally, research the VVSS T48M1A2 Suspension.


Suggested Equipment


Coated Optics Binocular Telescope Vertical Stabilizer Medium-Caliber Tank Gun Rammer Improved VentilationCamouflage Net 


Gallery

Historical Info

T21 wooden mockup
Not strictly part of the T20 series medium tanks, but closely related to them, the T21 was proposed as a replacement for the M3 & M5 series of Light tanks. It was to have been based on the T20 mechanics, would have had a 30 mm armour base, been armed with the 76 mm gun & weighed 24 tons. The design was prepared but held in abeyance as it was deemed too heavy for the light tank class. Ultimately the T21 concept was superseded by the T24 program, which was standardized as the M24 Chaffee.


Historical Gallery

Sources and External Links

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