M42 (Italy)

M42 Contraereo

CM52

Leopard 40/70

M42 Contraereo

CM52

Leopard 40/70

Italy

III Rank

Battle rating:

AB	RB	SB
3.7	3.7	3.7

Class:

SPAA

Research:18 000

Purchase:47 000

This page is about the Italian SPAA M42 Contraereo. For other usages, see M42 (Disambiguation).

Description

The Semovente M42 Contraereo (shortened as just M42 Contraereo, also nicknamed "Quadruplo") is a rank III Italian self-propelled anti-aircraft gun with a battle rating of 3.7 (AB/RB/SB). It was introduced in Update 1.85 "Supersonic".

General info

Survivability and armour

Smoke grenades

Creation of a smoke screen in front of the vehicle

Armourfront / side / back

Hull30 / 25 / 25

Turret15 / 15 / 15

Crew3 people

Visibility91 %

Armour type:

• Rolled homogeneous armour (hull, turret, turret frame)
• Gun steel (guns)

Armour	Front (Slope angle)	Sides	Rear	Roof
Hull	50 mm (12°) Upper plate 25 + 30 mm (12°) MG bulge 25 mm (80°) Front glacis 30 mm (15°) Lower plate	25 mm (8°) Top 25 mm Bottom 30 mm (9-12°) MG bulge	25 mm Upper part 25 mm (15°) Lower part	25 mm (10°) Front glacis 25 mm Crew compartment 8 mm (15°) Rear section - Engine 5-25 mm (8°) Rear section - Radiator vents
Turret	15 mm Turret front 25 + 15 mm Turret ring	15 mm (14°) 25 + 15 mm Turret ring	15 mm (17°) 25 + 15 mm Turret ring

Notes:

• Suspension wheels are 15 mm thick while tracks are 20 mm thick and bogies 10 mm thick.
• The belly is 14 mm thick and mudguards are 4 mm thick.
• The turret is reinforced with a 10 mm thick framing supporting the quadruple gun mount.
• The hull-mounted MG has been removed and the port has been obturated.

The M42 (Italy) is based off the M15/42 hull, with an opened top turret surrounding the crew members. The gunner does have an exposed spot in the front, and if shown to the enemy, can be machine-gunned easily without them to have to fire their main cannon. The turret may protect you from small rifle-calibre bullets, but .50 calibre and up, especially on the M4 Sherman will be able to penetrate your turret from anywhere, as it is generally weak against them. The hull armour is decent, still keeping the armour from the M15/42 hull, but don't expect to tank a lot of shots, as most of your enemies will have better calibre weapons, mostly encountering 75 mm and Russian 76.2 mm cannons. You may be able to bounce some smaller calibre shells like the 37 mm cannons but don't rely on your hull armour as your turret will most likely be targeted by the enemy. You have a small crew count of 3 members, and with two in the turret, and having okay armour, you'll usually die in one hit.

Mobility

Speedforward / back

AB42 / 4 km/h

RB and SB39 / 4 km/h

Number of gears5 forward

1 back

Weight15.5 t

Engine power

AB353 hp

RB and SB185 hp

Power-to-weight ratio

AB22.8 hp/t

RB and SB11.9 hp/t

Game Mode	Max Speed (km/h)		Weight (tons)	Engine power (horsepower)		Power-to-weight ratio (hp/ton)
	Forward	Reverse		Stock	Upgraded	Stock	Upgraded
Arcade	42	4	15.5	263	353	16.97	22.77
Realistic	39	4		164	185	10.58	11.94

Modifications and economy

Repair costBasic → Reference

AB1 103 → 1 492

RB890 → 1 204

SB1 389 → 1 879

Total cost of modifications19 610

32 300

Talisman cost980

Crew training13 000

Experts47 000

Aces330

Research Aces280 000

Reward for battleAB / RB / SB

80 / 90 / 130 %

136 / 136 / 136 %

Modifications

Mobility	Protection	Firepower
Tracks Research: 990 Cost: 1 600 105 Suspension Research: 890 Cost: 1 500 95 Brake System Research: 890 Cost: 1 500 95 Filters Research: 1 200 Cost: 2 000 130 Transmission Research: 1 600 Cost: 2 600 170 Engine Research: 1 600 Cost: 2 600 170	Improved Parts Research: 990 Cost: 1 600 105 Improved FPE Research: 890 Cost: 1 500 95 Crew Replenishment Research: 1 200 Cost: 2 000 130	Horizontal Drive Research: 990 Cost: 1 600 105 20mm_Breda_HE_ammo_pack Research: 990 Cost: 1 600 105 Adjustment of Fire Research: 890 Cost: 1 500 95 20mm_Breda_APHE_ammo_pack Research: 890 Cost: 1 500 95 Elevation Mechanism Research: 1 200 Cost: 2 000 130 Smoke grenade Research: 1 200 Cost: 2 000 130 Artillery Support Research: 1 600 Cost: 2 600 170 20mm_kwk_30_APCR_ammo_pack Research: 1 600 Cost: 2 600 170

Armaments

Main armament

4 x 20 mm Scotti-IF 20/70 mod.41 cannon

Ammunition640 rounds

Belt capacity160 rounds

Reloadbasic crew → aces

15.6 → 12.0 s

Fire rate600 shots/min

Vertical guidance-5° / 90°

20 mm Scotti-IF 20/70 mod.41 (x4)						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	3,024 (12)	600	-5°/+90°	±180°	N/A	52.8	73.1	88.8	98.2	104.5	5.20	4.60	4.24	4.00
Realistic						35.7	42.0	51.0	56.4	60.0

Ammunition

• Default: API-T · HEFI-T* · HEFI-T* · HEFI-T* - The standard belt fits the anti-aircraft role.
• Granata mod.35: HEFI-T* - This belt is perfect for shooting at aircraft.
• Perforante mod.35: API-T - This belt is adapted to destroy lightly armoured targets.
• PzGr 40: HVAP-T · API-T - This is the most powerful belt that can help you even take on armoured targets, although you lose almost all your penetrating power above 500 m so use it in CQC.

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
Default	API-T/HEFI-T*	38	36	27	19	14	10
Granata mod.35	HEFI-T*	2	2	2	2	2	2
Perforante mod.35	API-T	38	36	27	19	14	10
PzGr 40	HVAP/API-T	64	63	27	19	14	10

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile Mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive Mass (TNT equivalent) (g)	Ricochet
							0%	50%	100%
Granata mod.35	HEFI-T*	830	0.14	0.0	0.1	3	79°	80°	81°
Perforante mod.35	API-T	832	0.14	1.2	9	1.7	47°	60°	65°

Ammo racks

Ammo racks of the M42 (Italy)

Full ammo	1st rack empty	2nd rack empty	Visual discrepancy
252	204 (+48)	4 (+248)	No

Notes:

• Belts are modeled in boxes contaning 12 belts each.

Usage in battles

In Realistic battles, the Quadruplo is best used in the support role when tank hunting, sticking with teammates, assisting them and potentially distracting the enemy. Your best bet of killing any tank, usually a Sherman, Cromwell or T-34, is from the side as the HVAP will pierce through their side armour, killing the tank. Light tanks such as M24s, Stuarts and Crusaders are able to be penetrated from the front, but usually this is only in close range engagements. T-50 and other slightly armoured light tanks will be tougher to kill, but you're still able to flank them. You can kill basically any SPAA you see, as you'll usually encounter trucks or armoured cars. Ambush and surprise tactics are good options to kill tanks effectively, as the enemy will stroll past you, usually showing their side armour. Aggressive play styles are suggested to get the most out of the Quadruplo, similar to playing a Wirbelwind when tank hunting. Try not to expose yourself too much and move from cover to cover, as one hit from a tank shell, usually APHE, will knock you out in one shot, or the machine guns pierce your turret armour and kill both your gunner and commander. When it comes to shooting down planes in the Quadruplo, it is best to get their attention so they try to strafe you, or surprise them as they come closer to you, when you have a good shot as they won't have enough reaction time to evade your shots if they connect. Be mindful that you are open-topped, and you're less likely to survive a strafe run. It should also be noted that shooting continuously will sway the hull back and forth, which will make your aim go up and down. Despite the guns having a high fire rate, and being close together, the Quadruplo has a lower ammo count per belt with 12 in each gun, having 48 loaded in total at any time (essentially a discount Wirbelwind). It is easy to burn through it, so make sure you have a good shot on the aircraft you are trying to shoot down as you'll only have about 3-4 seconds of continuous fire before needing to reload.

Modules

Tier	Mobility		Protection	Firepower
I	Tracks		Parts	Horizontal Drive	Granata mod.35
II	Suspension	Brake System	FPE	Adjustment of Fire	Perforante mod.35
III	Filters		Crew Replenishment	Elevation Mechanism	Smoke grenade
IV	Transmission	Engine		Artillery Support	PzGr 40

Pros and cons

Pros:

• PzGr 40 shells are great at penetrating tanks from the sides and knocking out modules
• High mobility when spaded
• Great armour for a SPAA
• Guns have a very high rate of fire
• Guns are placed very close together

Cons:

• PzGr 40 is tier IV modification
• Performance is inadequate when stock
• Gap in the gunner's position of the turret armour
• Turret can be penetrated by .50 cals heavy machine guns
• High rate of fire makes it more difficult to adjust fire against planes
• 2 of 3 crew members crammed inside the turret
• Low magazine count for the guns (12 rounds per belt)
• Hull rocks back and forth when firing causing some rounds to miss

History

Development

The Semovente da 20/70 quadruplo was a SPAA developed to provide protection to Italian armoured units after the experience gathered in combat in North Africa. As a stop-gap solution, it was based on the M15/42 for the chassis and the Scotti-IF 20/70 mod.41 for the gun. The gun was the AA gun found in Italian infantry units and had to be adapted to accept belts with disintegrating links. The single prototype was captured by German forces upon Italy's surrender in September, 1943.

Combat usage

The M15/42 Carro contraero never saw combat. There are however claims it served as an inspiration for the German Wirbelwind AA tank, which first saw service in mid-1944.

Media

Skins

• Skins and camouflages for the M42 (Italy) from live.warthunder.com.

Videos

Whirly Boi Moved To Italy - M42 (Italy) 600 Rounds/Min - PhlyDaily

See also

Vehicles equipped with the same chassis

• M15/42

Other vehicles of similar configuration and role

• Wirbelwind
• So-Ki

External links

• [Wikipedia] Semovente da 20/70 quadruplo

Italy anti-aircraft vehicles
R3 Capraia	R3 T20 FA-HS
SIDAM 25	SIDAM 25 · SIDAM 25 (Mistral)
Wheeled	AS 42 · CM52
Tracked	M42 Contraereo · Leopard 40/70 · OTOMATIC
Hungary	◔ZSU-57-2 · ◔ZSU-23-4