TCM-20

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Challenger DS Pack
TCM-20
il_tcm_20.png
GarageImage TCM-20.jpg
ArtImage TCM-20.png
TCM-20
AB RB SB
4.3 4.3 4.3
Class:
Research:46 000 Specs-Card-Exp.png
Purchase:155 000 Specs-Card-Lion.png
Show in game

Description

The TCM-20 was an Israeli modification of the M3 half-track with a TCM-20 turret. This was likely a field modification done by Israel during their early days with sparse military equipment, mounting TCM-20 turrets on decade-old vehicles, including captured 6x6 trucks, BTR-152, and M3 half-tracks. The TCM-20 turret itself was an upgraded M55 Quadmount turret (M45 turret on M20 trailer) with two Hispano Hs.404 20 mm autocannons for better firepower. The lack of documents on the introduction of these modified vehicles makes it hard to trace their history, but they were likely replaced by the more advanced M163 VADS (Hovet) with radar rangefinder by 1975.

Introduced in Update "Fire and Ice" along with the initial Israeli ground tree, players will soon find similarities with the M13 MGMC in service with the US Army. However, the .50 cal HMGs are replaced by two 20 mm HS.404 autocannons, enhancing its firepower against aircraft or sometimes suppressing ground targets if needed.

General info

Survivability and armour

Armourfront / side / back
Hull6 / 6 / 6
Turret12 / 6 / 6
Crew4 people
Visibility75 %

The M3 half-track has been a staple of the US Army since the 1940s as one of the most widely-used half-tracks during the WWII alongside the Wehrmacht's Sd.Kfz series; these vehicles are a universal chassis which could be converted for different missions i.e. anti-aircraft. In Israel's case, the overall appearance of the TCM-20 is very similar to the M13 MGMC, but the larger guns and additional .30 cal M1919A4 gives its identity away. The vehicle is not rated for even rifle-calibre firearms at close distance. The thickest armour plate is the windshield, but do not expect it to stop HMG fire, even from afar. The engine block may absorb oncoming fire when head-on with enemies. In most cases, never, ever run into enemy fire lines or become targeted by aircraft, as these will end your career quickly; do also beware of high explosive shells or shrapnel, sometimes even close-calls could bring an end to the TCM-20.

Armour type:

  • Rolled homogeneous armour
Armour Front (Slope angle) Sides Rear Roof
Hull 6.35 mm (28-83°)
12.7 mm (1-27°) Driver windshield
6.35 mm 6.35 mm N/A
Turret 6.35 mm (0-77°) Turret front 6.35 mm N/A N/A

Notes:

  • Tracks are 15 mm thick
  • Suspension wheels are 15 mm thick, with the bogie being 10 mm thick.
  • Belly armour is 6.35 mm thick.

Mobility

Speedforward / back
AB80 / 19 km/h
RB and SB73 / 17 km/h
Number of gears8 forward
2 back
Weight10.0 t
Engine power
AB282 hp
RB and SB148 hp
Power-to-weight ratio
AB28.2 hp/t
RB and SB14.8 hp/t

M3 half-tracks share the same White 160AX petrol engine which could output up to 148 hp and the transmission could ensure its mobility both forwards and backwards; it can still retain the speed of all-wheel vehicles while crossing complicated terrain with ease.

Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 80 19 10 210 282 21 28.2
Realistic 73 17 131 148 13.1 14.8

Modifications and economy

Repair costBasic → Reference
AB2 824 → 3 634 Sl icon.png
RB2 285 → 2 940 Sl icon.png
SB3 295 → 4 240 Sl icon.png
Total cost of modifications40 400 Rp icon.png
78 400 Sl icon.png
Talisman cost1 400 Ge icon.png
Crew training45 000 Sl icon.png
Experts155 000 Sl icon.png
Aces630 Ge icon.png
Research Aces440 000 Rp icon.png
Reward for battleAB / RB / SB
110 / 140 / 210 % Sl icon.png
160 / 160 / 160 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Research:
2 000 Rp icon.png
Cost:
3 900 Sl icon.png
120 Ge icon.png
Mods new tank suspension.png
Suspension
Research:
1 800 Rp icon.png
Cost:
3 500 Sl icon.png
110 Ge icon.png
Mods new tank break.png
Brake System
Research:
1 800 Rp icon.png
Cost:
3 500 Sl icon.png
110 Ge icon.png
Mods new tank filter.png
Filters
Research:
3 400 Rp icon.png
Cost:
6 600 Sl icon.png
210 Ge icon.png
Mods new tank transmission.png
Transmission
Research:
4 400 Rp icon.png
Cost:
8 500 Sl icon.png
270 Ge icon.png
Mods new tank engine.png
Engine
Research:
4 400 Rp icon.png
Cost:
8 500 Sl icon.png
270 Ge icon.png
Mods tank tool kit.png
Improved Parts
Research:
2 000 Rp icon.png
Cost:
3 900 Sl icon.png
120 Ge icon.png
Mods extinguisher.png
Improved FPE
Research:
1 800 Rp icon.png
Cost:
3 500 Sl icon.png
110 Ge icon.png
Mods tank reinforcement il.png
Crew Replenishment
Research:
3 400 Rp icon.png
Cost:
6 600 Sl icon.png
210 Ge icon.png
Mods tank ammo.png
20mm_Oerlikon_HE_ammo_pack
Research:
2 000 Rp icon.png
Cost:
3 900 Sl icon.png
120 Ge icon.png
Mod arrow 0.png
Mods new tank horizontal aiming.png
Horizontal Drive
Research:
2 000 Rp icon.png
Cost:
3 900 Sl icon.png
120 Ge icon.png
Mods tank ammo.png
20mm_Oerlikon_AP_ammo_pack
Research:
1 800 Rp icon.png
Cost:
3 500 Sl icon.png
110 Ge icon.png
Mods aa cannon.png
Adjustment of Fire
Research:
1 800 Rp icon.png
Cost:
3 500 Sl icon.png
110 Ge icon.png
Mods new tank vertical aiming.png
Elevation Mechanism
Research:
3 400 Rp icon.png
Cost:
6 600 Sl icon.png
210 Ge icon.png
Mods art support.png
Artillery Support
Research:
4 400 Rp icon.png
Cost:
8 500 Sl icon.png
270 Ge icon.png

Armaments

Main armament

2 x 20 mm HS.404 cannon
Ammunition720 rounds
Belt capacity60 rounds
Reloadbasic crew → aces
3.9 → 3.0 s
Fire rate701 shots/min
Vertical guidance-10° / 90°
Main article: HS.404 (20 mm)

The modified M55 turret (now called TCM-20) houses two HS.404 20 mm autocannon, the same gun used in many early French aircraft, with the same configuration and ammo count. Thanks to the flat ballistic of HS.404, players will soon get to grips with the performance of the cannons. Not only can it take out aircraft as it was intended, it also ensures that light vehicles will have to think twice before appearing in front of a TCM-20, the rate of fire and penetration will make sure they will not get away with ease.

20 mm HS.404 (x2) Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity (Belt) Fire rate Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 720 (60) 700 -10°/+90° ±180° - 63.4 87.8 106.6 117.8 125.4 3.90 3.45 3.18 3.00
Realistic 42.8 50.4 61.2 67.7 72.0

Ammunition

  • Default: AP-T · HEF-I · AP-T
  • HET: HEFI-T · HEF-I · HEF-I
  • APT: AP-T

Penetration statistics
Ammunition Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
AP-T 42 38 26 16 10 6
HEF-I 4 4 3 2 2 2
HEFI-T 4 4 3 2 2 2
Shell details
Ammunition Velocity
(m/s)
Projectile
mass (kg)
Fuse delay
(m)
Fuse sensitivity
(mm)
Explosive mass
(TNT equivalent) (g)
Ricochet
0% 50% 100%
AP-T 830 0.14 - - - 47° 60° 65°
HEF-I 838 0.12 0 0.1 6 - - -
HEFI-T 838 0.12 0.1 0.1 5 79° 80° 81°

Ammo racks

Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
6th
rack empty
Visual
discrepancy
12 __ (+__) __ (+__) __ (+__) __ (+__) __ (+__) __ (+__) __

Machine guns

Ammunition1 000 rounds
Belt capacity250 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate500 shots/min
Main article: M1919A4 (7.62 mm)

To compensate for the lack of continuous firepower against infantry, TCM-20 installed a M1919A4 for the commander to suppress enemies; while it is ineffective against enemy armoured vehicles, there might be some occasions where enemies have exposed crews and the .30 cal could make short work of them.

7.62 mm M1919A4
Mount Capacity (Belt) Fire rate Vertical Horizontal
Commander 1,000 (250) 500 -10°/+10° -10°/+10°

Usage in battles

For players who have played the M13 MGMC in the US tech tree, it can be said that the TCM-20 is an successor to M13 to some extent, especially with its iconic twin gun configuration. However, when enemy aircraft get too close, they will find out the major difference: they would soon be shattered by the 20 mm HS.404 autocannons, recalling the memories from being chased by aircraft with these cannons. Such an "upgrade" is very welcomed as the 20 mm calibre is still more than enough to take out strafing fighters with ease, with overall 720 rounds onboard at 120 rounds per load, if players get used to the relatively straight ballistics and not being trigger-happy, the overall efficiency could be on-par with other SPAAs in other tech trees with their respective advantages. Most of all, the M3 chassis ensures that the TCM-20 can get to where it is needed as soon as possible thanks to its 72 km/h top speed, making it a viable option to flank enemies in some occasions; while the 13 km/h reverse speed could still make sure it can retreat to cover if masses of enemies/menacing aircraft rushing to where the vehicle is. As said, TCM-20 is still a half-track based SPAAG with minimal protection; in fact rifle-calibre firearms can harm the crew at around 200 m from the sides, let along HMGs and autocannons at even higher penetration, so be extra careful on where players should appear - rushing or running into a heated frontline is certainly a death sentence to the TCM-20. Overall, the TCM-20 is still a good AA half-track to handle different types of vehicles, whether it's on wheels, tracks or flying ones.

Pros and cons

Pros:

  • Devastating 20 mm autocannon which works well against aircraft
  • Rather mobile, can swiftly changes its position if needed
  • Quick turret traverse speed for target acquisition
  • Spare .30 cal machine gun for occasion unprotected crews of enemy vehicles

Cons:

  • Lightly protected up to rifle calibre firearms, also prone to overpressure
  • Relatively small ammo pool per load (60 per gun)
  • Insufficient penetration due to the battle rating

History

Devblog

During the 1960s, Israeli engineers took to modifying the American M45 anti-aircraft turret in service with the IDF at the time, in order to increase its effectiveness against fast modern aircraft. As a result, the engineers replaced the original quadruple 12.7 mm machine guns with a pair of HS.404 20 mm cannons salvaged from obsolete French jet fighters of the IAF. This new anti-air turret became known as the TCM-20 of which several hundred were converted from the original M45 design.

As the anti-air platform was just a towed turret, the IDF began to seek ways of increasing its mobility. The answer was to equip the turret to light armored vehicles in service with the IDF at the time. After some initial models were fitted to captured Soviet vehicles, a more permanent solution was found in equipping the widely used M3 halftrack with the TCM-20 turret.

After entering service with the IDF in 1969, TCM-20 immediately had its baptism by fire by taking part in the ongoing War of Attrition. The TCM-20 SPAAG also took part in the subsequent Yom Kippur War as well as in the Invasion of Lebanon in 1982. During the latter conflict, the vehicle also saw extensive use in the ground support role. Following the introduction of more advanced SPAAGs into IDF service, TCM-20 was slowly being phased out of IDF service before ultimately being retired in the early 1990s.

Media

Skins

See also

External links


Israel anti-aircraft vehicles
Half-track  TCM-20
M163 derivatives  Hovet · Machbet · Imp.Chaparral
Captured  ZSU-57-2 · ZSU-23-4