General AFV Thread

[LoooSeR]

Merkava 4 armor is not perforated, damaged Merks shows NERA being used as armor for turret.

[Mighty_Zuk]

Merkava 4 armor is not perforated, damaged Merks shows NERA being used as armor for turret.

Not perforated in the same way, but they still are. in the early production models at least.

 

The armor consists of many hard-pressed layers but there are certain air gaps in between plates (each plate = multiple layers) that result in what you see in the image above. 

Mark 4B lost these small gaps in favor of new, more efficient and lighter armor.

[LoooSeR]

That it is not perforated. Air gaps between NERA plates/modules is usual thing, just look into T-72B turret frontal armor layout.

[SH_MM]

The Merkava has no perforated armor, but the Israeli TOGA armor package for the M113 includes it:

 

 

In general there are a lot of M113 upgrades with perforated armor (Swiss M113 received it during KAWEST, Danish M113A1's used it for KFOR, KMW's upgrade propsal for Brazil included it, etc.)

[Xoon]

The Merkava has no perforated armor, but the Israeli TOGA armor package for the M113 includes it:

 

 

In general there are a lot of M113 upgrades with perforated armor (Swiss M113 received it during KAWEST, Danish M113A1's used it for KFOR, KMW's upgrade propsal for Brazil included it, etc.)

So how does perforated armor work? 

[Bronezhilet]

So how does perforated armor work? 

Except for a few very specific spots, a bullet hitting the armour will never hit a completely symmetrical spot, so the bullet will always rotate, lowering the penetration capabilities if it hits a plate behind the perforated armour.

[Xoon]

Except for a few very specific spots, a bullet hitting the armour will never hit a completely symmetrical spot, so the bullet will always rotate, lowering the penetration capabilities if it hits a plate behind the perforated armour.

How does this compare to fence armor or plain spaced plate? Is it simply lighter or cheaper to produce?

[Mighty_Zuk]

Except for a few very specific spots, a bullet hitting the armour will never hit a completely symmetrical spot, so the bullet will always rotate, lowering the penetration capabilities if it hits a plate behind the perforated armour.

bullets constantly rotate. I think the more appropriate term would be "yaw". 

a kinetic energy projectile loses much of its energy as a result, and the impact surface grows substantially.

[EnsignExpendable]

 

 

Here's one I haven't seen before...

 

"Experimental Russian Tank destroyer KSP-76 (GAZ-68). One Prototype was built by the Gorky car factory (GAZ) in May 1944, based on the experimental 4 x 4 GAZ-63 chassis with excellent cross-country ability. KSP-76 had a very low armored hull with an open crewcompartment and was armed with a 76,2mm divisional gun. The 16,5mm frontal armor could withstand armor-piercing rounds, the tires were also bulletproof, a very unique feature. The development of this vehicle, without a doubt a very modern and advanced design able to be used in a wide variety of roles, was cancelled due to the production of the SU-76M Assault gun.

Specifications: 4x4, weight: 5,34 t, dimensions: 6,35 x 2,05 x 1,55 m, ground clearance: 27,3 cm, crew: 3 men, armament: 76,2mm ZiS-3 (58 rounds), armor: 5-16,5 mm, engine: 85HP GAZ-202, speed: 62-77 km/h, range: 430-580 km"

 

This was offered to the VDV as an alternative to a special sub-6 ton tank that they asked for. I guess they turned it down.

[Walter_Sobchak]

This was offered to the VDV as an alternative to a special sub-6 ton tank that they asked for. I guess they turned it down.

I'd be willing to try it out as a daily commuter vehicle.  

[LoooSeR]

Leopard2A6M CAN with Soviet PT-54 mince clearing roller

[SH_MM]

It is not the PT-54 mine clearing system, but the MCRS (mine clearing roller system) developed for the US Army between 1983 and 1986 (first US units received the MCRS in 1990).

Except for a few very specific spots, a bullet hitting the armour will never hit a completely symmetrical spot, so the bullet will always rotate, lowering the penetration capabilities if it hits a plate behind the perforated armour.

It won't always rotate, specifically when using much samller holes. But the high-hardness of the steel together with the different stress at the bullet's tip can make the round shatter.

[LoooSeR]

Well, it looks a lot like Soviet mine roller.

[Mighty_Zuk]

Well, it looks a lot like Soviet mine roller.

Most likely based on one.

 

We (in Israel) use KMT-4/5 mine rollers based on a Soviet design.

[Ramlaen]

[Walter_Sobchak]

Good lord that thing is like M3 Lee levels of tall.

[ZloyKrolik]

Or that is one short dude.

[Belesarius]

Or that is one short dude.

Uh nope.

 

https://en.wikipedia.org/wiki/Terrex

 

Weight

  25 tonnes (55,000 lb) Length 7 metres (23 ft 0 in) Width 2.7 m (8 ft 10 in) Height 2.1 m (6 ft 11 in) Crew 2 (Commander, Driver)

[Bronezhilet]

 

Uh nope.

 

https://en.wikipedia.org/wiki/Terrex

 

Weight

  25 tonnes (55,000 lb) Length 7 metres (23 ft 0 in) Width 2.7 m (8 ft 10 in) Height 2.1 m (6 ft 11 in) Crew 2 (Commander, Driver)

 

If that thing is indeed 210 cm, that dude would be 146 cm tall.

 

If we assume dude to be 170 cm tall, the Terrex would be ~240 cm tall, which looks to be about right.

[Donward]

I think our crazy rabbit friend was making a joke. I almost did the same :-)

[Belesarius]

If that thing is indeed 210 cm, that dude would be 146 cm tall.

 

If we assume dude to be 170 cm tall, the Terrex would be ~240 cm tall, which looks to be about right.

Whatever the exact measurement the thing is fuckin' huge.

[LoooSeR]

Maybe the hull is 210 height, without counting road clearance, but if we count it, than it is 240+? I heard that this guy is almost 1.8m tall.

 

Leclerc

[LoooSeR]

M-84M and M-84AB1 of Serbian Army

[LoooSeR]

BVP-2 и M1126 Stryker

 

Cobra-S - Slovakian/Belorusian modification of BMP

[LoooSeR]

M-84AB of Kuweit Army and M2 Bradleys of US army