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SKurj

HE Vulnerability scale?

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What makes a ship more vulnerable to HE? Fires?  Thin armor? slow fire response? what?

I keep seeing things like this mentioned, that such and such a ship is more vulnerable to fires or HE than another..

Is there a scale or rating list (quick reference chart) anywhere that shows which ships are more vulnerable to others?

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  • Armor thickness: sufficient thick armor will defeat a HE shell's penetration, causing them to shatter without doing damage. The thickness threshold depends on the HE shell caliber, HE penetration coefficient and presence of IFHE skill.
  • Fire resistance: every ship has an innate fire resistance depending on tier and fire duration depending on type (DD and CL have a shorter fire duration than BBs, CVs burn for only a few seconds) and the presence of signal flags and trained skills.

There is no quick reference chart, because any such chart would be shorter than the amount of exceptions, ifs, ands and buts.

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3 minutes ago, Lert said:
  • Armor thickness: sufficient thick armor will defeat a HE shell's penetration, causing them to shatter without doing damage. The thickness threshold depends on the HE shell caliber, HE penetration coefficient and presence of IFHE skill.
  • Fire resistance: every ship has an innate fire resistance depending on tier and fire duration depending on type (DD and CL have a shorter fire duration than BBs, CVs burn for only a few seconds) and the presence of signal flags and trained skills.

There is no quick reference chart, because any such chart would be shorter than the amount of exceptions, ifs, ands and buts.

Can it be simplified ...  lines and tiers that are more vulnerable than others?

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8 minutes ago, SKurj said:

Can it be simplified ...  lines and tiers that are more vulnerable than others?

Every ship has different zones with different armor thicknesses and thus will shatter different calibers of shells, so, no, that cannot be simplified because how vulnerale a ship is to HE depends on 1) the shell hitting it and 2) where on the ship it hits.

Higher tiers have a higher innate fire resistance than lower tiers.

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I think you'll find the wiki helpful which is where I copied the chart from. https://wiki.wargaming.net/en/Ship:Fire

The Fire Resistance Coefficients (FRC) are shown below:

Ship Tier WowsshipclassDestroyerDefault.png WowsshipclassCruiserDefault.pngWowsshipclassBattleshipDefault.png(Stock Hull) WowsshipclassDestroyerDefault.png WowsshipclassCruiserDefault.pngWowsshipclassBattleshipDefault.png (Top Hull) WowsshipclassAirCarrierDefault.png (all)
Tier I 1.0000 N/A
Tier II
Tier III 1.0000 0.9667
Tier IV 0.9334 0.9001 0.8002
Tier V 0.8668 0.8335
Tier VI 0.8002 0.7669
Tier VII 0.7336 0.7003
Tier VIII 0.6670 0.6337
Tier IX 0.6004 0.5671
Tier X 0.5338 0.5005
Edited by RipNuN2
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1 hour ago, SKurj said:

Can it be simplified ...  lines and tiers that are more vulnerable than others?

In general, there's no such thing as far as fire is concerned.

What you do get, is lines or ships where they could potentially be more vulnerable to fire.

For example, ships (or lines) that are suited for speccing into secondaries, will tend to have those skills and upgrades, rather than those that promote survival. That's the reason you'll often hear that KM BBs are more vulnerable to fire. They often use BFT instead of BoS, MFCS/AFT instead of FP, and mount the rudder shift upgrade instead of DCM1. (T6+)

Those choices make it slightly easier for them to catch fire, and make them burn longer.

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12 minutes ago, Skpstr said:

In general, there's no such thing as far as fire is concerned.

What you do get, is lines or ships where they could potentially be more vulnerable to fire.

For example, ships (or lines) that are suited for speccing into secondaries, will tend to have those skills and upgrades, rather than those that promote survival. That's the reason you'll often hear that KM BBs are more vulnerable to fire. They often use BFT instead of BoS, MFCS/AFT instead of FP, and mount the rudder shift upgrade instead of DCM1. (T6+)

Those choices make it slightly easier for them to catch fire, and make them burn longer.

^This.

Also, many players have trouble distinguishing between the damage they take from fires and the concurrent direct damage they take from low-caliber HE spam. They just see that their HP melted and complain they were “burned down in 60 seconds” or some other such nonsense.

For example, Grosse Kurfurst and Republique are both tier X battleships and have indentical fire resistance parameters. Republique, typical of French battleships, has 32mm of deck plating along her entire length, bow to stern. In contrast, GK has 50mm of plating over most of the deck, with only the very ends at the bow and stern being covered in 32mm plating. What this means is that many HE shells that strike GK will shatter on the center parts of the deck for no damage, while most HE shells from enemy cruisers will penetrate the deck of Republique. Whether a shell shatters or not does not effect its fire chance, so theoretically both ships will take the same number of fires and the same proportional damage from fire (which deals damage as % max HP over time), but Republique will take noticeably more damage at the same time in the form of direct penetration damage.

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33 minutes ago, Skpstr said:

In general, there's no such thing as far as fire is concerned.

What you do get, is lines or ships where they could potentially be more vulnerable to fire.

For example, ships (or lines) that are suited for speccing into secondaries, will tend to have those skills and upgrades, rather than those that promote survival. That's the reason you'll often hear that KM BBs are more vulnerable to fire. They often use BFT instead of BoS, MFCS/AFT instead of FP, and mount the rudder shift upgrade instead of DCM1. (T6+)

Those choices make it slightly easier for them to catch fire, and make them burn longer.

I've gotten to the point that almost all my BBs don't have SGM2 anymore, but DCSM2 is installed instead.  So even my Brawler BBs got a "Free BoS" without the points into BoS.

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