Question about HE Fire Chance and Tier 4 Fire Prevention skill

[linusboy2118]

Recently just in my US DD i have noticed a drop in amount of fires started especially against BBs. I understand 5% is a low chance but over the past several games i have averaged about 1.5 % and the fires i do start are on DDs and cruisers for the most part. So that Fire prevention skill is -10% fire chance is that against hits that would have started a fire or is it my 5% minus the -10% fire chance so i will never start a fire on anyone with that skill in use.

[chaosbringer42]

All the % modifiers are based off your base fire chance. So you have a 5% chance and they have -10% fire chance modifier. So you would have a 5% - 0.5% chance to start a fire (4.5%) against the enemy ship. However there is a higher chance to start a fire if you aim at the deck rather than the hull, and RNGesus is always with us, so its always pretty random if you start fires or not.

[linusboy2118]

well heres some numbers that i remembrt 94 hits 1 fire 105-2 fires 127-1 fire 89-1 fire and those fires were on DDs and CA. im beginningto not even shoot at BBs cause my BB guns on my destroyer dont do any damage and its so rare to start a fire on one its not worth the risk to fire on them. I will say its only my farragot that does this all my other DDs especially my tier 5 russian DD start fires rather often. My Cleveland wasnt doing it much until i got rid of the inertia fuse HE skill and got the added fire bonus skill now it starts them with acceptable frequency.

[Ryuu]

Originally posted by chaosbringer42:

there is a higher chance to start a fire if you aim at the deck rather than the hull

I have a feeling this is true, though i can't quote any solid sources. Maybe not every hit type can start fires, or "red hits" have a higher chance, and it's easy to hit superstructure for "red hits". Bow and stern have less elements that can be hit for good damage. And that would make sense.
So: where you hit probably also affects fire chance.

Originally posted by linusboy2118:

my other DDs especially my tier 5 russian DD start fires rather often.

Might be connected with aforementioned, because Soviet guns are more powerful and have better ballistics so would cause more "red hits".

We should probably head to the Training Room and try it on bots, checking different ship parts with different hit types.

[Ryuu]

http://wiki.wargaming.net/en/Ship:Fire

Fire Chance =
[Fire Resistance Coefficient] x ( 1 - [Damage Control Modification 1] - [Fire Prevention] ) x ( [Projectile Base Fire Chance] + [Demolition Expert] + [Signals] - [Inertial Fuse for HE Shells])

Here's a comparison of USSR T5 Podvoisky and USN T6 Farragut: http://proships.ru/stat/ships/216,800/
Base fire chance: 8% vs 5% (without Demolition Expert)
Chance to set a fire is: 30.94% vs 28.86%
It's calculated as "shooting constantly for 10 seconds with 100% accuracy against a ship of YOUR tier that HAS Fire Prevention perk"

But of course it's harder to hit continuously with Farragut's ballistics

[imrahil2]

Fire chance is the same no matter where the shells hit. You see them more often on the superstructure because its the easiest spot to hit consistently. This is why the fire prevention skill is so useful mainly to BBs because it merges the 2 superstructure zones into 1. So instead of 2 fires burning you only have 1. This is really helpful with the high tier HE spam.

[Ryuu]

Originally posted by imrahil2:

Fire chance is the same no matter where the shells hit. You see them more often on the superstructure because its the easiest spot to hit consistently. This is why the fire prevention skill is so useful mainly to BBs because it merges the 2 superstructure zones into 1. So instead of 2 fires burning you only have 1. This is really helpful with the high tier HE spam.

So, there are no clever ways to improve your fire-setting chance? (not including perks and signals) Just hit with more shells anywhere and hope for the best?

[imrahil2]

Originally posted by Ryuu:

Originally posted by imrahil2:

Fire chance is the same no matter where the shells hit. You see them more often on the superstructure because its the easiest spot to hit consistently. This is why the fire prevention skill is so useful mainly to BBs because it merges the 2 superstructure zones into 1. So instead of 2 fires burning you only have 1. This is really helpful with the high tier HE spam.

So, there are no clever ways to improve your fire-setting chance? (not including perks and signals) Just hit with more shells anywhere and hope for the best?

Pretty much also though you want to change where you hit if you already have a fire on one section or if it's becoming saturated you want to hit an unsaturated section.

[Ryuu]

Originally posted by imrahil2:

Originally posted by Ryuu:

So, there are no clever ways to improve your fire-setting chance? (not including perks and signals) Just hit with more shells anywhere and hope for the best?

Pretty much also though you want to change where you hit if you already have a fire on one section or if it's becoming saturated you want to hit an unsaturated section.

Yeah, but i find it difficult to set fires at the stern and bow even if it's a broadsiding battleship at mid-range and i'm a quick-firing destroyer :/
But maybe it's best instead to concentrate on damage with fires being just a lucky bonus.

[imrahil2]

Originally posted by Ryuu:

Originally posted by imrahil2:

Pretty much also though you want to change where you hit if you already have a fire on one section or if it's becoming saturated you want to hit an unsaturated section.

Yeah, but i find it difficult to set fires at the stern and bow even if it's a broadsiding battleship at mid-range and i'm a quick-firing destroyer :/
But maybe it's best instead to concentrate on damage with fires being just a lucky bonus.

Originally posted by Ryuu:

Originally posted by imrahil2:

Pretty much also though you want to change where you hit if you already have a fire on one section or if it's becoming saturated you want to hit an unsaturated section.

Yeah, but i find it difficult to set fires at the stern and bow even if it's a broadsiding battleship at mid-range and i'm a quick-firing destroyer :/
But maybe it's best instead to concentrate on damage with fires being just a lucky bonus.

Depends on the dd you are using, what BB you are shooting at and their angle. Sometimes as I'm sure you probably already do, you can switch to AP and get overpens on the BB superstructure if it's already saturated by HE/

[Ryuu]

Originally posted by imrahil2:

Originally posted by Ryuu:

Yeah, but i find it difficult to set fires at the stern and bow even if it's a broadsiding battleship at mid-range and i'm a quick-firing destroyer :/
But maybe it's best instead to concentrate on damage with fires being just a lucky bonus.

Depends on the dd you are using, what BB you are shooting at and their angle. Sometimes as I'm sure you probably already do, you can switch to AP and get overpens on the BB superstructure if it's already saturated by HE/

Nope, i'm not a really good shooter and rely mainly on torpedoes So i virtually never think about switching to AP while using a destroyer. Yeah, i guess i should, especially if BB is already on fire, little use hitting it with more HE.

[pyber]

Wait, destroyers can reload for AP? *le gasp!*

But seriously, I rarely bother switching ammo on the rare occasions I'm driving a DD. My Harakaze has IFHE it just uses all of the time, while the others really only get loaded for AP during the odd knife fight with other DD's. I don't drive gunboat DD's though, so dunno if I'd be any different with them.

Insofar as lighting fires goes, if I want to burn all the things, I take my Zao out for a spin, heh. It's not the best firestarter at its tier of course (23% with signals), but its the best I've got that I actually drive.

[linusboy2118]

Well that beats my 1.5% rate i average in my Farragut lol. But now even my beloved russian DD has caught the sickness. My last two games i had 70+ hits with 0000000 ZERO 0000000 fires started and before all you unicoms start saying"you werent aiming right or it was burnt and oversaturated" i know that and i wasnt aiming at those parts. In fact one ship a Hipper was full health when i started hit him 20 times no fires about 8k damage and the other was Colorado at full health which i pinged 60 HE shells off him for ZEro fires and Zero damage lol. Man it would sure be nice to get another 3 points so i could get that HE tier4 skill.