Regards to BB Torp Belt

[OscarMike_]

After playing up to Iowa (us) and currently up to Nagato (japan), it feels like IJN BBs handle torp hits A LOT better than US BBs.

 

Any figures on this?  Any tests been done you guys can verify that?

[DokturProfesur]

I think it lends more to the IJN's larger health pool than any torpedo armor. As far as I can tell, torpedoes do the same damage (barring angling and where on the belt) but beyond that I don't think there are any variables.

[Argh_My_Liver]

WG was very simplistic in their modeling of TDS, basically the size of torpedo bulge is the only thing that matters.

 

Wider bulge=better damage reduction.

 

The lowest underwater belt part is used in torpedo damage calculations as a damage decreasing coefficient just like the TDS armor belt of IJN ships. Still, the Iowa's TDS is not so "deep"(wide) as of modernized Amagi/Nagato(bulges) or Yamato/Montana. Also, don't forget the big unprotected parts(bow, stern) - they will receive the full torpedo damage, this is true for all ships in the game(and real life).

 

[Xero_Snake]

As tier progresses along the line, higher-tier BBs are capable of reducing damages taken from torpedoes thanks to anti-torpedo bulges, as well as reducing the change of critical hits from them.

[OscarMike_]

As tier progresses along the line, higher-tier BBs are capable of reducing damages taken from torpedoes thanks to anti-torpedo bulges, as well as reducing the change of critical hits from them.

 

As I previously stated, I am playing US Iowa at Tier 9, but so far in my Japanese Nagato at tier 7 it feels like it handles hits better than even the high tier Colorado and Iowa.

 

Feels as if torpedos hit for a lesser amount on when I play IJN BB, could be just me obviously, but it sure does seem that way.

[Argh_My_Liver]

 

As I previously stated, I am playing US Iowa at Tier 9, but so far in my Japanese Nagato at tier 7 it feels like it handles hits better than even the high tier Colorado and Iowa.

 

Feels as if torpedos hit for a lesser amount on when I play IJN BB, could be just me obviously, but it sure does seem that way.

 

As Ard said "Still, the Iowa's TDS is not so "deep"(wide) as of modernized Amagi/Nagato(bulges) or Yamato/Montana." The width of the TDS is what is used, Japanese BB's tend to have wider TDS so they have better damage reduction. Like I said, very simplistic.

[Xero_Snake]

 

As I previously stated, I am playing US Iowa at Tier 9, but so far in my Japanese Nagato at tier 7 it feels like it handles hits better than even the high tier Colorado and Iowa.

 

Feels as if torpedos hit for a lesser amount on when I play IJN BB, could be just me obviously, but it sure does seem that way.

 

As Liver quoted from Ard's, Nagato seem to have a larger bulge. Hence, better at absorbing torpedoes hit.

[Suzunami]

So WG are using the historical armor scheme according to reply#3

 

As Liver quoted from Ard's, Nagato seem to have a larger bulge. Hence, better at absorbing torpedoes hit.

 

Basically WG is using the historical armor scheme that IJN put in more effort in underwater protection and USN focused more on belt above waterline (USN belt armor did not go as deep below water line as IJN).

[Kenjister]

It's quite simplistic. Each ships TDS reduces damage by a percent if it hits the center, which was listed on a chart somewhere around here.

How it works I'm not too sure, but probably it's like a HE shell. The TDS reduces damage by triggering the blast from further away.

 

Nagato's TDS gives about 24% reduction. IIRC, Iowa's is also in that range. What you're probably seeing is the increased torp lethality at those tiers. Either that or because Iowa is longer, you're more likely to take torp hits to the bow or stern when you dodge - which has 0 reduction.

[Takamachi_Nanoha_sg]

Torp damage increases with tier. Higher tier BBs normally face higher damage torps. For Nagato and Cororado...maybe because IJN tends to have higher Hp pool

[mofton]

One of the devs put a post out with the percentages per ship.

 

Some USN are particularly worse than others, in particular IIRC the Amagi had about a 40% reduction from the belt, and the North Carolina's was about 23% -  worse than the Colorado. It's as-stated, bulge based which isn't a perfect way of modelling it.

 

Woe unto stock NC, confronted with Shimakaze's and with as much health as the T5 Kongo, with worse torpedo defenses than the Colorado, plus a slower rudder shift and bigger target...

[El_Judarino]

I found a chart!

From Ard with love!

Edit: The image itself after some imgur-fu



All a bit dated, and I'm not sure where the fellow on the EU server found them originally, hope they help tho!

This came up a few days ago and I found this (somewhat dated) table of torp bulge damage reduction values. I don't think they've been dramatically changed since this was put out however. As you can see, Nagato and Iowa have similarly effective bulges, Amagi's (upgraded) is nearly twice as good though. 

 

As for how the value is calculated, I have zero clues. Though I believe I've read Liver's insight in several other posts over the last few months... seems about right at any rate.