(Almost ) Historical MOD

[inqistor]

It all began, when I realised, that Japan players outproduce their Armament Points, and generally turn its production off, at the beginning of 1943. This is in exact opposite to what actually happened in IRL (and WITP). Then I discovered, that Japan squads actually DO NOT UPGRADE (which, again is opposite to what happened in WITP), and whole Japan statistics are quite questionably done from both design (ie, implementation decision in game terms, have exact opposite result, as planned IRL), and historical point of view. Here is link to "research" thread. There is also serious error, in that most "special" squads are modelled after TYPE B platoon (Device 07, which has 20 Soft Attack), with 3 GDs per platoon, while they were IRL modelled after TYPE A platoon (Device 709, which has 22 Soft Attack), with 4 GDs.
MOD mostly takes care of Japan Shaped Charge technology import, from Germany, in mid-1942, introduction of TYPE 97 20mm AT Rifle, for Pacific/Burma-front units, and equipping Paratroops with TYPE 100 SMGs.

MOD, in greater, or lesser way address several game problems:
Lots of burned Armament Points in early 1943. So that should force Japan player to keep Armament production, and use more HI.
Reason, for both sides, to push into ending/not ending the war at historical date. At 9/45 things will get tough for Allied armour, of course if Japan hoarded enough Armament Production.
IJA squad becomes larger. That means Division will need more transport capacity (over 1500 extra men), and will use more supply (again, more transports needed).
All Japan squads get upgrade at 1942/1943. That will allow them remain competitive for a longer time, and inflict more loses to Allies (especially in disabled devices), so overall tempo of operations will be slower.
Stronger AT strength, will result in slightly more destroyed Allied tanks, and MUCH MORE disabled. Again, slower tempo.
SNLF squads are smaller (and early version is also weaker). If you are seeking garrison for your small island, SNLF units are your first choice.
Paratroopers are MUCH stronger. They should easily dispatch lone base force. Allies have now real need for using all those small battalions for protecting LOC.

It seems the MOD is "work in progress".
For scenarios, check posts #4, 5, and 6.
All Scenarios are COMPLETELY compatible with AI. For both sides.

Here is table. There are some changes to keep it consistent with game design. Green colour means, number is greater, than previous AE scenario, Red colour, means, that this number is lower:

[Buck Beach]

ORIGINAL: inqistor

It all began, when I realised, that Japan players outproduce their Armament Points, and generally turn its production off, at the beginning of 1943. This is in exact opposite to what actually happened in IRL (and WITP). Then I discovered, that Japan squads actually DO NOT UPGRADE (which, again is opposite to what happened in WITP), and whole Japan statistics are quite questionably done from both design (ie, implementation decision in game terms, have exact opposite result, as planned IRL), and historical point of view. Here is link to "research" thread. There is also serious error, in that most "special" squads are modelled after TYPE B platoon (Device 07, which has 20 Soft Attack), with 3 GDs per platoon, while they were IRL modelled after TYPE A platoon (Device 709, which has 22 Soft Attack), with 4 GDs.
MOD mostly takes care of Japan Shaped Charge technology import, from Germany, in mid-1942, introduction of TYPE 97 20mm AT Rifle, for Pacific/Burma-front units, and equipping Paratroops with TYPE 100 SMGs.

MOD, in greater, or lesser way address several game problems:
Lots of burned Armament Points in early 1943. So that should force Japan player to keep Armament production, and use more HI.
Reason, for both sides, to push into ending/not ending the war at historical date. At 9/45 things will get tough for Allied armour, of course if Japan hoarded enough Armament Production.
IJA squad becomes larger. That means Division will need more transport capacity (over 1500 extra men), and will use more supply (again, more transports needed).
All Japan squads get upgrade at 1942/1943. That will allow them remain competitive for a longer time, and inflict more loses to Allies (especially in disabled devices), so overall tempo of operations will be slower.
Stronger AT strength, will result in slightly more destroyed Allied tanks, and MUCH MORE disabled. Again, slower tempo.
SNLF squads are smaller (and early version is also weaker). If you are seeking garrison for your small island, SNLF units are your first choice.
Paratroopers are MUCH stronger. They should easily dispatch lone base force. Allies have now real need for using all those small battalions for protecting LOC.

So, first, questions:
1) Do I have to get some other files, or just changing few devices in scenario, and saving it in different slot, is enough? (is there 11 files in ONE scenario?!! Do I have to pack them all? This will take over 11 Mb)
2) Which slots are currently "commonly" taken. I understand Scenario should have number over 25?
3) what happens, when two squads are in production, one of them upgrade of the other? If they would have monthly number of production, I would guess, the "old type" would be immediately upgraded to "new type". But in case of infinite Japan production? Does it mess everything, or actually allows to take replacements, without upgrading the whole division?

Here is table. There are some changes to keep it consistent with game design. Green colour means, number is greater, than previous AE scenario, Red colour, means, that this number is lower:

But I can't tell the green from the red[:(]

[inqistor]

Everything looks to work just fine. Actually there are lots of units, in first wave, with strenghtened squads, and already onboard ships, but those ships are only 80-90% loaded, so it is no problem.
Giretsu just advanced one month. There was large para operation at end of November 1944, so it should upgrade before. Test at the beginning of 1943, showed, that units sucked 15000 Armament Points, at least 2 Division upgraded their squads (which should take 6-7k each), and most of other Divisions upgraded their Engineering Squads. SNLF units also upgraded in around 50% cases, so probably Armament Cost is similar, like in WITP (NOT 1:1 load point).
I must first mess with names, to allow all squads to show in the same area in database. Currently they are somewhat in 5 places. There were some trouble with finding free slots, so numbers are quite random.
I am wondering, if units destined to attack Tarawa should not be actually prepared for this base? They are planning for Kwajalein.
Now... where is the field to write briefing for scenario?

ORIGINAL: Buck Beach
But I can't tell the green from the red[:(]

Seriously, those coloured information is only cosmetic.


Here is table, with number of Device, and their upgrade.
Code is simple "OLD VALUE in WITPAE" -> "NEW VALUE in mod"

[inqistor]

MODified Scenario 1. Numbered as 31.

Quite a lot of modifications:
HISTORICAL PILOT NUMBERS!
Japanese squads upgrades
San-Shiki, sometimes even delayed
75mm guns have Hard Attack statistics streamlined (every type have different)
Two Infantry Guns upgrade their ammunition to HEAT around 1943/1944
Commando squad is initially smaller (and weaker), to fit onto submarines.
Singapore is now undamaged, at the scenario beginning.
Ki-44 TOJO arrives one month earlier
2 additional historical pilots

China replacements are revised.
Ka-1 autogyro gets 9 units. 6 land-based, and 3 ship-based.
All Maru-Yu SSTs are now present, with modified armament, and entry-ports.
10cm/65 Type98 AA Gun IS now the BEST Japanese DP.
Few additional tweaks. Check RTF file for further info.

ENJOY!

[inqistor]

MODified Scenario 2. Numbered as 32.

FOR NEW VERSION PLEASE CHECK POST#61, ON THIRD PAGE.


Main difference would be using maximum values, where I earlier had choice. This actually only change last Paratroopers upgrade, by 3 points. First Paratroopers upgrade is month earlier, to be in line with "research".
Also IJA Cavalry gets 20 Hard Attack (because it did not upgrade anyway).
IJA Motorized Squad gets additional LMG in 1943, so it is now 31 Soft Attack.
And most important:
IJA Infantry Squad gets Island Warfare modification AND Rocket Launcher, in 8/44. That makes them only slightly weaker than US squads. This is LAST upgrade of IJA Infantry, no additional in 1945.

Commando squad is initially smaller (and weaker), to fit onto submarines.
China replacements are revised.
Ka-1 autogyro gets 9 units. 6 land-based, and 3 ship-based.
Few additional tweaks. Check RTF file for further info.

Also, TOJO gets engine change, because last patch did not implemented it in this scenario.
Singapore is now undamaged, at the scenario beginning.

[inqistor]

MODified Scenario 6. Numbered as 36.

SOMETHING IS WRONG WITH DELETION OF OLD FILE.
For updated Scenario please check post #56 on next page.


I was not sure, what third scenario should be, but I have found bug in Scenario 6, so this is it, with quick fix.
Identical to Scenario 31, but with month earlier first upgrade for Paratroopers.

TOJO gets engine change, because last patch did not implemented it also in this scenario.
Device 1486 (Japanese 88mm Type 99 AA Gun) is now not-empty. I have copied its statistics from stock Scenario 1.

Modifications similar to Scenario 1:
HISTORICAL PILOT NUMBERS!
Japanese squads upgrades
San-Shiki, sometimes even delayed
75mm guns have Hard Attack statistics streamlined (every type have different)
Two Infantry Guns upgrade their ammunition to HEAT around 1943/1944
Commando squad is initially smaller (and weaker), to fit onto submarines.
Singapore is now undamaged, at the scenario beginning.
Ki-44 TOJO arrives one month earlier
2 additional historical pilots

Also, Navy pilot pool is larger by 10 (to represent pilots MIA/WIA at Pearl Harbor), and 12mm Rockets have 10 effect (previously 0)

ENJOY!

[inqistor]

Planes transport squads in specific way, different that rest of devices. I have run some tests, and it seems it works fine, even with larger squads. Both para drop, and air transport for Para, and large Infantry Squads works fine. Even for planes with small cargo space.

There is first scenarion in post number #4.
GC Scenario 1, numbered as 31.

[inqistor]

For some time, I was wondering what exactly should be included into "better prepared" version, of Scenario 2 squads. The only "historical" option, would be adding SMG, or AT Rocket Launcher into squad. Obviously, strengthening initial forces, would be useless, as Allies do not have enough land power to stop Japan anyway.
So, I have used theoretical possibilities. Namely, IJA Infantry gets "Island Warfare" upgrade (double LMGs, and GDs), also Motorized Squad gets another LMG, Cavalry begin game with full AT power (20), and Giretsu is at the top of scale (53).

[inqistor]

Scenario 6 (beginning at 8th December). I have set start date at 1/11/43, and gave 200k armament, and manpower. Test run through 10 days. Results:

The larger number of devices to upgrade, the rarer they will upgrade. During 10 days most smaller units upgraded (including Combat Engineers in Divisions), but only around 1/3rd Divisions get their infantry squads upgrade. Smaller units, even Brigades seems to upgrade just fine.

46458 Armament Points were used, and around 30k manpower.
8463 squads, with "weight" over 20, should have used 170k Armament Points, according to manual, so cost is still much lower, than 1:1.

Roughly 3*8.5k squads (in Divisions) + 4.5k SNLF half-squads + (3k Engineer squads + less than 1k Motorized Squads) * 2 (because they use 2 Rifle Grenade Launchers) + 156 Para Squads = 25.5+4.5+8=38k Rifle Grenade Launchers used, which is safely under 49k produced of Type 2 Rifle Grenade Launchers. Not even mentioning 36k of Type 100 Rifle Grenade Launchers.
5k SNLF squads is safely within limit of 10k Type 100 submachine guns produced, not even including earlier imports.

Upgrades until late 1943 should take around 100k Armament Points, I was actually counting on, at least, 3 times this number, to force player NOT to upgrade units in China. Well, I can do nothing with engine right now, so problem with overproduction of Armament Points is still there, although smaller. Only time will tell how big drain would be all reinforcements for Japan in late war.


PS. As a side note. Take a look at SUPPORT (should be produced at 40 points per day), or Ta-Chi 7 Radar (should be made only ONE during 10 days). It seems, that setting production for Japan Devices do not work, at all. Standard Armament Production still apply for everything.

[inqistor]

Looks, like new problems begin to arise...

As most of you probably know, there was special type of anti-aircraft ammunition for large Yamato Guns. I thought (again), that it was a rare curiosity, but it seems, this was the most common ammunition type in use!

Yamato's main guns fired 27 rounds of Mk III AA shells during the battle of Mariana.

During the battle of Leyte Gylf, Nagato's main guns fired 45 rounds of Mk I AP shells, 52 rounds of Mk Zero HE shells, and 84 rounds of Mk III AA shells. Yamato and Musashi both fired Mk III shells during the first air raid on Oct 24, but Musashi's captain refused his ordnance officer's request during the second raid.

Type 3 Common may have made up as much as 40% of the outfit by 1944.

What is even more intersting, it seems most large guns had some modification of San-Shiki ammunition(even those used at merchant ships), and the "fragmentation" ammunition, used during bombardments of Guadalcanal, was actually THE SAME ammunition. I surely see only 3 types of ammo, for naval guns: AP, HE, and San-Shiki. I can not find any other specialised bombardment ammunition (Ryûsandan).
I can not nail reasoning behind DP designation. At first I thought, that it was given only to guns, with elevation at least 70 deg, but there is at least one 15cm gun, with elevation 55 deg, which is clasiffied as DP.

So, adding AA function, bears two interesting consequences:
1) Big calibre guns uses more ammo, so Japan must transport more supplies to front (and large guns uses a LOT of supply)
2) TFs could be forced to retire prematurely, because of using too much ammo, before reaching target, which is actually quite historical (but reasoning is different)

Now, finding exact range of this ammo could be hard. Also, I do not think game allows one gun to shot at multiple targets, so this change will not be very useful (but it was probably the same IRL). At least I hope gun damage is incorporated during AA fire, so those guns should sure-kill even B29, once they hit.
So, there are 3 options:
1) Put EXACT historical ceilings, and DO NOT care the consequences
2) Put EXACT historical ceilings, and modify it according to game engine. For example it could be fairly low, so half of DB exiting ceilings would be above its range
3) Cut ceiling, for not primarily AA guns. Probably to 5000 ft, to engage only DBs/TBs at exiting ceiling

The second use is as ground bombardment ammunition, which probably should increase Soft Attack of Naval Guns.
I think, the effect should be little stronger, than land artillery. The main difference looks to be number of "incendiary tubes", so taking as foundation 406 mm (is there land type of those?), and scalling from it:
460mm should be around 12.5% stronger (2,527 fragments vs 2,846 fragments)
203mm should have around 1/5th strength (255/1200)
127mm should have around 1/20th strength (66/1200)


Anyone have more online data, about San-Shiki? It seems there was at least one modification for it (Type 4). Does TYPE 3 means, that it was introduced in 1943 (well, at least in late 1942, to use at Guadalcanal)?

[inqistor]

There is Device 773 40cm 3YT CD Gun, with 224 Soft Attack
Also, there is Device 1480 40cm Howitzer, with 339 Soft Attack

40cm Naval Gun, is similar to Device 773. Soft Attack seems to be just 1/10th of Effect, however this effect is calculated. Since 2240 is pretty close to 2527 (number of fragments of San-Shiki in 406mm gun), one of the possibilities is to give this gun 252.7 Soft Attack, so it will look like this:
406mm 252.7
203mm 252.7*255/1200=53.69875
127mm 252.7*66/1200=13.8985
Yet, it will only give 252.7*2846/2527=284.6 Soft Attack for 46cm Gun, while Device 1654 46cm Gun, have already 321. The option is to leave this at 321.

The other way, is to get this 321, and scale lesser guns down, so:
406mm 321*2527/2846=285.02002811
203mm 285.02002811*255/1200=60.5667559733
127mm 285.02002811*66/1200=15.676101546

The last option will be setting 40cm to Device 1480 statistics, so:
406mm 339
203mm 339*255/1200=72.0375
127mm 339*66/1200=18.645
460mm 339*2846/2527=381.794222398

That, of course, do not include 36cm, 15cm, and 14cm guns, as I do not have any data, about number of fragments in shells. Anyone can supply those data?

[inqistor]

Some interesting info:

Bursting Charge Power - The following approximations of explosive power may be used using TNT = 1.00 as a reference point.

* Before and during World War I
o Black powder = 0.33 to 0.50
o Guncotton = 0.50
o Picric Acid = about 1.05 to 1.10
o USA Explosive D = 0.95

* After World War I
o German and Italian TNT = 1.00
o British Shellite = 0.96
o Japanese TNA = 1.05
o USA Explosive D = 0.95

* Other Explosives (torpedo warheads, mines, depth charges)
o Amatol (80/20) = 1.24
o DD (Dinitronaphthalene/Dinitrophenol 60/40) = 0.82
o PETN = 2.21
o MDN (Melinite/Dinitronaphthalene 80/20) = 0.88
o RDX = 1.94
o Tetryl = 1.39
o Torpex (TPX) = 1.50
o HBX-1 = 1.17
o HBX-3 = 1.14
o German SW types = about 1.07
o Japanese Type 97 (TNT/hexanitrodiphenylamine 60/40) = about 1.07

It seems, that Japan used 10% better explosive material in their projectiles.
Does, it mean, that we should multiply guns effectiveness by that values?

And, another problem. The same page, info about San-Shiki:

Sankaidan - Japanese for "fragmentation." Also known as "incendiary shrapnel shells" (shôi ryûsandan). These were AA rounds which contained hundreds of incendiary-filled steel tubes and officially designated as "Type 3 Common Shells" (3 Shiki tsûjôdan). The incendiary filling was "Elektron" metal (45%), barium nitrate (40%) and rubber (14.3%) together with sulfur (0.5%) and stearic acid (0.2%). "Elektron" was a trade name for a metal alloy composed primarily of magnesium (90%) with the balance being aluminum (3%), copper (3%), zinc (2%) and silicon (2%). Besides their incendiary effect, the steel tubes also acted as shrapnel. The Type 3 was first deployed in 1942 for 20 cm (8 in) and larger guns and in 1943 for the 12.7 cm/40 (5 in) AA and 12.7 cm/50 (5 in) DP guns. The 46 cm (18.1 in) Type 3 projectiles for the Yamato class battleships may have been nicknamed "The Beehive" but this could be apocryphal. A time fuze was used to set the desired bursting distance, usually about 1,000 meters (1,100 yards) after leaving the muzzle. These projectiles were designed to burst in a 20 degree cone extending towards the oncoming aircraft with the projectile shell itself being destroyed by a bursting charge to increase the quantity of steel splinters. The incendiary tubes ignited about half a second later and burned for five seconds at 3,000 degrees C, producing a flame about 5 meters (16 feet) long. These shells were thought to have a larger lethal radius than did standard HE AA rounds. The concept behind these shells was that the ship would put up a barrage pattern through which an attacking aircraft would have to fly. However, the USN pilots considered them to be little more than fireworks and not an effective AA weapon.

There are two ways to implement this:
1) Change in the code. Not doable in editor
2) Making two types of guns, the latter already with included San-Shiki. There is "upgrade" field in statistics, but it seems to not work for ship guns. Also, most ship classes have upgrades in different timeframes, than San-Shiki introduction. That would require of making additional upgrades in the middle 1942/early 1943.

At least it seems, that part of guns are not used anywhere. Namely 20cm Cruiser early version. That should be easy, as there are only around 5 classes of CAs, and only their first version should have "old" gun type.


Only the LAST possibility from my earlier calculations include modification of Yamato's 460mm, so I will stick to it.

I think, I will project the rest of guns, by projectile weight:
First curiosity - 20 cm/12 (8") Short Gun projectile weights only 47 kg, which is FAR less, than standard 20 cm/50 (8") 3rd Year Type No. 2 with 125.85, so it should have 72.0375*47/125.85=26.9031585221
15 cm/40 (6") 41st Year Type projectile weights 45.4, pretty close to earlier 47. 26.9031585221*45.4/47=25.9873063171
14 cm/50 (5.5") 3rd Year Type projectile weights 38 kg. Closest is 15 cm, so 25.9873063171*38/45.4=21.7514898689
36 cm/45 (14") 41st Year Type projectile weights 622 kg. 2/3rd of 940 kg from 40 cm/45 (16.1") 3rd Year Type. 339*622/940=224.317021277

So, by rounding everything downward:
460mm 381
406mm 339
36cm 224
203mm 72
20cm Short 26
15cm 25
14cm 21
127mm 18

[dwg]

It seems, that Japan used 10% better explosive material in their projectiles. Does, it mean, that we should multiply guns effectiveness by that values?

Are they included already? You'll need to reverse the calculation to see if effectiveness correlates to bursting charge or to bursting charge times equivalent explosive power. Even then damage isn't solely a factor of burster size, particularly for AP.

quote:

Sankaidan - Japanese for "fragmentation." Also known as "incendiary shrapnel shells"

I think the significant part of that quote is: "USN pilots considered them to be little more than fireworks and not an effective AA weapon."

[inqistor]

ORIGINAL: dwg

It seems, that Japan used 10% better explosive material in their projectiles. Does, it mean, that we should multiply guns effectiveness by that values?

Are they included already? You'll need to reverse the calculation to see if effectiveness correlates to bursting charge or to bursting charge times equivalent explosive power. Even then damage isn't solely a factor of burster size, particularly for AP.

Smaller (127mm) Japan guns are slightly stronger, than comparable USA version, but I see, that there is difference in shell weight 23kg/22.7kg. Larger Allied guns are much stronger, and British seems to be strongest. However, 50 effectiveness in 5' guns seems to be directly number of lbs of shell, so statistics seems very simple. As I understand, AP penetration is directly from penetration tables, so obviously no changes here. I am wondering, if Soft Attack was also projected from appropiate shells, as HE seems to be generally lighter, than AP versions.

quote:

Sankaidan - Japanese for "fragmentation." Also known as "incendiary shrapnel shells"

I think the significant part of that quote is: "USN pilots considered them to be little more than fireworks and not an effective AA weapon."

I do not think, gun can target several planes in one shot, and they should, to model San-Shiki. Considering that, large guns have around 20s accuracy, and smaller DP, in higher 50s, I do not expect them, to have serious impact on Allied loses. What I hope, is that even missed shots, have chance to influence enemy run, so I hope to see much lower hit-ratio against ships equipped with San-Shiki.

It seems, that Scenario 2 is first candidate for modification, as it is obvious early San-Shiki falls under "better preparations for war".
Here is picture, from mentioned earlier topic. It is supposed to be:

battleship Nagato firing Mk III AA shells during battle of Sibuyan

[mike scholl 1]

ORIGINAL: inqistor

It seems, that Japan used 10% better explosive material in their projectiles.
Does, it mean, that we should multiply guns effectiveness by that values?

If you want to get into this, you should also include the fact that picric acid explosive was highly unstable (witness the destruction of the Mutsu) and tended to burst on impact rather than after penetration (spoiling the armour piercing effect).

[inqistor]

ORIGINAL: mike scholl 1

ORIGINAL: inqistor

It seems, that Japan used 10% better explosive material in their projectiles.
Does, it mean, that we should multiply guns effectiveness by that values?

If you want to get into this,

Naah. Too much work. Well, actually I could probably export everything into spreadsheet, and change it there, but it seems, that Naval Guns need some more work. For example, 20cm Short Japan Gun have identical Soft Attack, as longer versions, despite having only 1/5th of shell weight.
Also, it seems that accuracy should be seriously looked into, as dedicated AA guns have it lower, than DP versions.
And the last, Soft Attack of very large guns. It seems, they were using much smaller HE shells, than their AP versions, so should be accordingly weaker. For example:
Yamato Gun have 3219 effect, but its HE shell weights only 2998.
USA 16"/50 (40.6 cm) Mark 7 Gun, have 2700 lbs(!) AP shell, but its HE weights only 1900.
It seems, that this should leave British Guns, as the best for bombardment.

you should also include the fact that picric acid explosive was highly unstable (witness the destruction of the Mutsu)

That is pretty easy to implement. It just needs to increase chance for random explosion effect on japanese ships. I am afraid, not doable in editor.

and tended to burst on impact rather than after penetration (spoiling the armour piercing effect).

That also should not be hard to implement. Just change the random damage, to have greater chance to make low damages. There is field for malfunction in editor, but I think it just negates ALL damages, so again, it will be only possible in code.

[JWE]

ORIGINAL: inqistor
It seems, that Japan used 10% better explosive material in their projectiles.
Does, it mean, that we should multiply guns effectiveness by that values?

Japanese explosives were not more powerful; they were considerably less powerful than Allied equivalents. Japan used TNT and their version of Amatol (TNT and Ammonium Nitrate) as explosive charges with picric acid as a booster. Relative brisance was 1.00 to 1.17. Allied shells used RDX (cyclonite), Composition B, Cyclotol, Torpex. Relative brisance 1.35 to 1.66 (20 to 66% more powerful).

Japanese shell steel was several tensile grades lower then Allied equivalents. Japanese fuze technology was at least one to three generations behind Allied equivalents. Japan compensated for their lack of modern, high tensile, drawn steel, ammunition production facilities by manufacturing fragmentation ammunition with ball fragments, focused and accelerated by a compressed black powder mix (copied exactly from the Russian Tula Arsenal specs).

At the wars beginning, an Allied shell was approximately 1.6 times more effective than an equivalent Japanese shell. By 1943, an Allied shell was approximately 2.2 times more effective than an equivalent Japanese shell. By 1945, an Allied shell was approximately 5.7 times more effective than an equivalent Japanese shell.

The Russians and Chinese captured huge stocks of Japanese weapons and ammunition in 1945. During the Korean conflict, the NKs and Chinese used much of these stocks. The Soviets remanufactured and refilled as much captured Japanese ammunition as they could, because the Japanese ammunition was so tactically puny as to be useless. The Chinese and NKs threw away all their captured Japanese stuff as soon as they captured anything worthwhile from the UN forces. China ended the Korean conflict with over 30% of its captured 1945 stock of Japanese ammunition still in place. It was useless.

So in the real "real world", Japanese weapons and ammunition were deemed inferior to their Western equivalent, to the point of uselessness when any alternative was available. But this is a game, and real "real world" numerics would send Japan into the dumper, so Allied values are purposely cut by 30% to 200% to balance the game.

Are you truly interested in how these things work? Or just a japfanboi looking to hustle Jap weapons? If the first, people here can likely help. If the second, you are on your own.

[inqistor]

Since now I know the formula, behind calculating naval gun effect, lets calculate Soft Attack again. The basic assumption is, that 46cm gun should have slightly better statistics, and scaling it down will produce desired effects.

46cm gun projectile weights for Common Type 3 IS - 2,998 lbs., same as HE version, so it should have 299 Soft Attack. Shell is supposed to produce 2,846 fragments, so basic calculations will go from 284.6, It should be slightly better, than 299.8, or even 299.8*1.05.
Increasing damage by 10% gives 110%*284.6=313.06. Close, but probably too close (299.8*1.05=314.79).
Lets get 15%. 115%*284.6=327.29. Better, but still far too close to 314.79.

120%*284.6=341.52. Around 10% better for both cases, so it seems right.

406mm 341.52*2527/2846=303.24
203mm 303.24*255/1200=64.4385
127mm 303.24*66/1200=16.6782
20 cm/12 (8") Short Gun 64.4385*47/125.85=24.0652324195
15 cm/40 (6") 41st Year Type 24.0652324195*45.4/47=23.2459904648
14 cm/50 (5.5") 3rd Year Type 23.2459904648*38/45.4=19.4569964243
36 cm/45 (14") 41st Year Type 303.24*622/940=200.654553191

The final table:
460mm 341
406mm 303
36cm 200
203mm 64
20cm Short 24
15cm 23
14cm 19
127mm 16

ORIGINAL: JWE
At the wars beginning, an Allied shell was approximately 1.6 times more effective than an equivalent Japanese shell. By 1943, an Allied shell was approximately 2.2 times more effective than an equivalent Japanese shell. By 1945, an Allied shell was approximately 5.7 times more effective than an equivalent Japanese shell.

So, is it implemented in-game? I do not see any changes in Naval Guns in editor. Actually all EFFECTs seems to be directly by shell weight, no matter of nation, so...
is it in the code? Does Allies Naval Guns becomes increasingly better with time? Is it in manual?

[FatR]

I don't think that making any special allowance for things of marginal effectiveness like San-Shiki shells makes sense. There is a degree of abstraction in the game after all. Like, the game sees only the difference between "DP" or "not DP" gun, there is no provision for guns that technically had ability to fire at aircraft, but were mostly ineffective in this task, so, say, the Japanese destroyer fleet gets a huge bonus here even after shifting all guns with no anti-aicraft ability at all into the former category.
Or, for another example, there is no differentiation between gun mounts save for that written in the statistics of the gun itself. Allies get some early bonuses from this, but Japanese benefit much more, when late in the war every single 25mm manually-operated mount with a simple ring scope (which are added in droves to almost everything that floats by late-war upgrades) has exactly 1/3 effectiveness of a triple powered mount, connected to a fire director, even though realistically the flak value of the former should have been, like, 1/30 of the latter.

[inqistor]

ORIGINAL: FatR

I don't think that making any special allowance for things of marginal effectiveness like San-Shiki shells makes sense. There is a degree of abstraction in the game after all.

Depends what does it mean "marginal". I doubt anyone actually made any research in this topic. Also, it seems that all bombardment ammunition during Guadalcanal Campaign was San-Shiki. Anyway, does not sole fact of firing should decrease planes hit-ratio against ship?
I am after ANYTHING, which increases frontline supply usage [:D]

Or, for another example, there is no differentiation between gun mounts save for that written in the statistics of the gun itself. Allies get some early bonuses from this, but Japanese benefit much more, when late in the war every single 25mm manually-operated mount with a simple ring scope (which are added in droves to almost everything that floats by late-war upgrades) has exactly 1/3 effectiveness of a triple powered mount, connected to a fire director, even though realistically the flak value of the former should have been, like, 1/30 of the latter.

Actually I think it is an error. I do not know, if in-game mounts actually increase chance of hit, but there are MG(x2), and Quad-MGs as single Devices, so it seems triple-AA-mounts should be also one Device.

Surprise, surprise, there is Device 602, Triple 25mm AA gun. I do not see it used anywhere, so...

what are benefits of several mountings on ships?