[Development] Discussing reports related to the Challenger 2 MBT

Well… is it though?
I certainly think that’s what it means, but then why specify an angle at which it can protect?

so long as it hits the front plate still, so long as it cannot penetrate when fired directly at the flat plate… unless it’s some magical round that defeats sin cos and tan as well as ASPRO HMT it should protect from all angles.

I think the devs are interpreting “Angle: frontal arc to centreline: +/- 30 degrees sides included; elevation 0” as the heading in the protection analysis, which is why Smin’s screenshot shows heading of 30 (and impact of 69 (nice), which I kind of have an issue with as the heading refers to the camera position rather than the impact angle)?

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Just a casual shoutout to @Gunjob for being an absolute legend and helping us to get to even this stage after years of being ignored through mountains of bug reports. Some progress is better than none at this stage.

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The STANAG standards aren’t about armor plate directly but the general level of protection. So if a vehicle is rated at STANAG 5 it can take a 25mm APDS/APFSDS hit from 500m away from a firing angle of anywhere from 0 to 30 degrees. So, that means if an armor kit is rated or declared as being able to provide STANAG 5 protection it must be able to provide that 0 degree impact protection.

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@Smin1080p fixed my post. As you can see, the angle where the blocks by themself stop the round is much bigger than it should be(Ignoring the fact that multiple blocks take part in the proces).

That’s what i thought, the frontal arc to center centre line +/- 30°

When I look at the xray I see the Spall liner at the front plate in front of the driver but I can’t find it anywhere else. Is it there and hard to find? When I shoot at it in the hanger only the front one displays too as far as I can see. Is this still coming? Thx

Cheers o7

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You mean this?
image

Sweet, thanks mate. Sides I’m guessing I’m just missing in my search?

The spall liner is at: UFP, turret sides, turret roof and behind the cheeks

I dunno about you but that looks like a 90° hit to me XD

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Exactly. If the blocks were being sold as part of a larger kit then Smin would be accurate in his testing. But they’re being sold as their own discrete armor component and not reliant upon anything else to provide that frontal impact protection. Therefore, in order to meet the STANAG 5 standards they must be able to provide that 0 degree protection.

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Cool. I’m clearly just blind then. Thanks for the quick reply mate

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Here is a US 25mm APFSDS:


Clearly penetrating the ERA.

Considering this company fits ERA to bradleys, I would say it’s more than likely it’s tested against bradleys rather than Freccias.

If we take Bradley, then the angle of nonpen becomes 69

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.paxisceramics.com/wp-content/uploads/2019/02/stanag-45691.pdf&ved=2ahUKEwit1aSBq-WDAxV4gP0HHd0YBXUQFnoECCUQAQ&usg=AOvVaw0JI1lUIB6BHBEhxJf0E2id
This might explain more tbh

This is the only source I’ve found:

image

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Same as my link, it showcases everything

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Yes. And in order for a specific armor component to meet STANAG Level 5 it must be able to provide that 0-0 angle hit protection.

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