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admiral_beto

abruzzi has double layered armor

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i noticed that this ship its not easy to citadel and eats a lot of overpenetrations or 33% damage where it should be a citadel so i revised his armor model and noticed that it has double layered armor 

he has 30mm external armor

shot-18_05.04_13_18.44-0052.thumb.jpg.6437f63dec9fd71df8a70c3003b56ff1.jpg

100mm internal armor in a curved fashion

shot-18_05.04_13_19.08-0788.thumb.jpg.656f5ce4f54cef9ca3d578a090f40263.jpg

and of course 40mm internal deck armor

shot-18_05.04_13_19.52-0827.thumb.jpg.d670d45fb314723614c183ed9664fae2.jpg

  • Cool 2

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[HINON]
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It's a double-edged sword.

 

It's accurate, for the most part, to the armor scheme. 

Irl the belt scheme was a 30mm Out plate, with a 100mm KC plate on 8mm ER as the main armor belt (curved, top angle was a 12° incline, placed 880mm inboard of the 30mm plate. 880mm behind that as a 12mm ER printer bulkhead.

So, apart from the ER plating being ignored (included on prior RM ships in-game), yay for accuracy.

The for and aft bulkheads were both split in the 30mm + 100mm manner (no ER plating, however) - but this is fused into a solid 130mm in-game.

The in-game ship also has a 30mm belt extending to the bow, which I've never seen mentioned by any source or shown in any armor schematic of the class. Such a practice would be extremely unlikely as bow armor plating had long since fallen out of favor with the RM, especially on cruisers.

 

However, the problem is that this armor scheme relied on a mechanic called decapping. The 30mm outer plate would strip the cap off of most cruiser-killer shells and smaller (the limit was 203mm shells - it could decap most at any angle, but the German and Italian 203mm required an angle of impact of 45° or more - which corresponded to a range of about 30000 yards (27.4 km), beyond the range any 203mm gun would be used)

Thus, when the de-capped shells hit the main armor belt, which was made of Terni Cemented (a FH type), it would shatter unless of sufficient caliber. The Italians considered this to be roughly equal to the 150mm belt of the Zara-class cruisers, which had a 150mm belt of Terni Cemented. It would probably be more accurate to state that the belt was effectively immune to shells of 7" or below, but it's performance against 203mm would be more tricky due to overmatch issues.

 

In-game, however, there is no such 'decapping' modelled in-game. If a shell hits the 30mm plate it may activate the fuse but otherwise it will only slow it down, and it will hit the 100mm belt like it would any other piece of armor (especially as armor quality is not modelled). The largest shell this is meaningful again is 152mm (I haven't tested against 180mm), and the 30mm gives roughly about an extra 1 to 1.3 km of protection compared to just a the 100mm belt by itself. Against a 203mm shell, it will hardly make a different as the 30mm plate will barely slow it by 1% (and that's only at longer-ranges).

 

The curious thing is that WG has compensated decapping schemes elsewhere, even on the same ship. Roma's belt is a composite reliant on decapping, 70mm OD on 10mm ER + a 280mm KC plate (with a 250mm gap filled with cellulite) - in game, rather than get 70mm + 280mm with a 250mm gap, it for a solid 375mm belt.

The in-game 'Abruzzi' has her fore and aft 30+100mm bullheads fused into a solid 130mm plate.

Her belt? Nope. And she suffers for it, ultimately making her armor scheme worse in-game than it should be.

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Phoenix is definitely the guy to ask. I haven't done the research on the ships to the extent that Phoenix has. I learn a lot more from him and at one time from Rottenfish about the armor and armament. 

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So..what shells and what ranges would penetrate the citadel belt?

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11 minutes ago, Bill_Halsey said:

So..what shells and what ranges would penetrate the citadel belt?

  • All battleship caliber guns (283mm+) at all ranges.
  • All 203mm guns up to ranges of 15km.
  • All 180mm guns up to ranges of 13km.
  • All 152mm guns up to ranges of 6km (some as high as 10km).
  • Cool 2

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6 minutes ago, LittleWhiteMouse said:
  • All battleship caliber guns (283mm+) at all ranges.
  • All 203mm guns up to ranges of 15km.
  • All 180mm guns up to ranges of 13km.
  • All 152mm guns up to ranges of 6km (some as high as 10km).

TL/DR: YOU'RE *****D

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