O-I: Japan's Super Heavy Tank

[petraea 75]

Fantastic work, really interesting!

[Laurelix 5,472]

Well.... 4.7BR Churchill has 152mm frontal armour

O-I has 150mm at front and rear. But it's gun is better than Churchills. I think Tier 3 5.7 is fair.

It's gun can't penetrate King Tiger and King Tiger can penetrate 152mm without too much issue. Eventhough it's a 150mm deep gun O-I shoots, the reload will be very slow. Edited February 1, 2016 by Laurelix

[DracoExAstra星からの龍 124]

For once I would like Gaijin to really earnestly listen to its players and do something that the majority of us want, especially with the Japanese tank tech tree, you guys have gathered so much information about this and I can tell that you guys believe strongly that Japan should get a tank tech tree, it would be a waste it Gaijin were to fail to implement a Japanese tank tech tree into the game. I feel that Gaijin has been neglecting the Japanese air tech tree, especially when it comes to to jets, and I would hate to see that happen to the tank tech tree as well. So, I'd just like to say that I appreciate what you guys are doing and I really hope that all your hard work is rewarded in the end by Gaijin implementing a Japanese tank tech tree into the game.

[bellezza03 6,005]

Well.... 4.7BR Churchill has 152mm frontal armour

O-I has 150mm at front and rear. But it's gun is better than Churchills. I think Tier 3 5.7 is fair.

It's gun can't penetrate King Tiger and King Tiger can penetrate 152mm without too much issue. Eventhough it's a 150mm deep gun O-I shoots, the reload will be very slow.

you want this thing against tigers and JS1? Are you freaking mad???? :facepalm:

 

Very nice and interesting, you did good work here :salute:

this HE shell with 6.15kg of TNT(?) will be the strongest shell in the game! still, use this shell not be easy due to the velocity (540m/s).

how long is the reload time of the main cannon?

actually KV-2 gun have even more filler in the shell

[moshe770 394]

actually KV-2 gun have even more filler in the shell

oh, I checked now, you right, I compared to SU-152. anyway, this shell will be the 2nd in the game.

[Nudelblitz 22,006]

Well.... 4.7BR Churchill has 152mm frontal armour

O-I has 150mm at front and rear. But it's gun is better than Churchills. I think Tier 3 5.7 is fair.

It's gun can't penetrate King Tiger and King Tiger can penetrate 152mm without too much issue. Eventhough it's a 150mm deep gun O-I shoots, the reload will be very slow.

Most of the frontal 150mm armor is angled (but the turret)

The bit what is unangled in the front is covered by the 2 small turrets.

 

By all means Laurelix, this thing is going to be like a Maus when trying to kill it, so you will slowly kill it because of the amount of crew you need to kill.

Putting this on the same br as a Tiger I, just because of that is not smart at all, hell it will be even annoying for a Kingtiger to kill, or a Is2 (yea thats how much crew it has), but lets put it on 6.3.

 

150mm gun using HE will be able to kill every single tank in game, frontally. I mean you can already take a look at the KV-2 who does the same.

Remember the broken HE-mechanic in this game?

[Laurelix 5,472]

Most of the frontal 150mm armor is angled (but the turret)
The bit what is unangled in the front is covered by the 2 small turrets.

By all means Laurelix, this thing is going to be like a Maus when trying to kill it, so you will slowly kill it because of the amount of crew you need to kill.
Putting this on the same br as a Tiger I, just because of that is not smart at all, hell it will be even annoying for a Kingtiger to kill, or a Is2 (yea thats how much crew it has), but lets put it on 6.3.

150mm gun using HE will be able to kill every single tank in game, frontally. I mean you can already take a look at the KV-2 who does the same.
Remember the broken HE-mechanic in this game?

KV-2 can't kill KT from front. The 150mm gun on O-I has also low velocity. Panther D at 5.7 has 189mm at 10m penetration. O-I armour is pretty much flat. I think IS1 and Tiger I should be 5.3BR anyways. But putting O-I at 6.0 wouldn't ruin it.

Black Pronce has 152mm also and it's fun has way faster rate of fire and way more penetration with 220mm at 10m. Not to mention velocity. Edited February 1, 2016 by Laurelix

[Nudelblitz 22,006]

KV-2 can't kill KT from front. The 150mm gun on O-I has also low velocity. Panther D at 5.7 has 189mm at 10m penetration. O-I armour is pretty much flat. I think IS1 and Tiger I should be 5.3BR anyways. But putting O-I at 6.0 wouldn't ruin it.

Black Pronce has 152mm also and it's fun has way faster rate of fire and way more penetration with 220mm at 10m. Not to mention velocity.

KV-2 can kill Kt from the front, hell even the E-100 and Maus (<-- you should know that).

Are you seriously saying that you still don't know the broken HE mechanic in this game?

 

Also the blackprince has way, less crew and space then the O-I.

The only reason why the Maus is still on 7.7 is because its rather hard to kill because of the space inside and crew ammount, otherwise it would already sit on 7.0 or lower because of the absolute trash 207mm frontal turret. (thx gaijiob)

[Laurelix 5,472]

KV-2 can kill Kt from the front, hell even the E-100 and Maus (<-- you should know that).
Are you seriously saying that you still don't know the broken HE mechanic in this game?

Also the blackprince has way, less crew and space then the O-I.
The only reason why the Maus is still on 7.7 is because its rather hard to kill because of the space inside and crew ammount, otherwise it would already sit on 7.0 or lower because of the absolute trash 207mm frontal turret. (thx gaijiob)

Can kill Maus but not KT...

Trust me I've been in custom battles before in my Kingtiger spawn camping 3 KV-2's who used HE. All fired at me and the best they did is take out my tracks or disable gun. However no internal damage.

[Nudelblitz 22,006]

Can kill Maus but not KT...

Trust me I've been in custom battles before in my Kingtiger spawn camping 3 KV-2's who used HE. All fired at me and the best they did is take out my tracks or disable gun. However no internal damage.

You shoot under the gun, or underneath the tank OR at the side of the tank at the highest track.

 

This is how you dissable them.

[Laurelix 5,472]

You shoot under the gun, or underneath the tank OR at the side of the tank at the highest track.

This is how you dissable them.

You have to be close to do that and remember that IS-2 and KT have 230mm+ penetration. And O-I is slow and relies on armour. It's gun isn't as good as 17 pounder with APDS.

[Nudelblitz 22,006]

You have to be close to do that and remember that IS-2 and KT have 230mm+ penetration. And O-I is slow and relies on armour. It's gun isn't as good as 17 pounder with APDS.

''you have to be close''

 

Almost every map in warthunder in both realistic and arcade are close combat.

 

17 pdr with APDS sucks atm atm

 

I think 6.0-6.3 is a good br, remember it has a huge crew

[Laurelix 5,472]

''you have to be close''

Almost every map in warthunder in both realistic and arcade are close combat.

17 pdr with APDS sucks atm atm

I think 6.0-6.3 is a good br, remember it has a huge crew

6.0 and it's a deal. IS-2 mod 1944 could one shot kill it especially at close range. 15cm ammo is huge and O-I has plenty of it. 6200g of explosives in the 15cm shells. Just ammo rack the tank.

[Antiquarian 26]

Very interesting, so what about the stories of a 100 ton and/or 120 ton? Did they ever exist?

 

Also this account sheds light on Hara's description of events.

[Monkeymaddness 49]

Because thats what the blueprints and report confirm. We used the Type92 for decades because it was the only logical gun presumed at the time. The 10cm cannon was never used or considered, just the 15cm. 

 

ohh not the type 92 howitzer? 

 

 

i assumed that it was real and ended up not being specified enough to state how long the gun was (hence the armourment of the O-Ni and the O-Ho, AKA, oi-120 ton which we now know is fake). 

[Monkeymaddness 49]

for gods sake! when i try researching the 105mm experimental-Kai gun google just showes me a bunch of useless chinese crap!

 

does anyone have a source of info i can look at? 

Edited March 18, 2016 by Monkeymaddness

[Tolenka 383]

 

for gods sake! when i try researching the 105mm experimental-Kai gun google just showes me a bunch of useless chinese crap!

 

does anyone have a source of info i can look at? 

 

I doubt you will find much anything in something that isn't Chinese/Japanese. I also doubt any of the O-I (Insert Ton) would have been built, it would have been useless besides on the Chinese front, which there was a different kind of warfare that was being waged which did not require heavily armoured tanks. 

[panzerpaddel 793]

I doubt you will find much anything in something that isn't Chinese/Japanese. I also doubt any of the O-I (Insert Ton) would have been built, it would have been useless besides on the Chinese front, which there was a different kind of warfare that was being waged which did not require heavily armoured tanks. 

Ha ..would have been useless? Nope.
Chinese soldiers didnt had much to use against tanks, i would guess that this fat armored tank could reck´em all.

[fufubear 6,705]

I doubt you will find much anything in something that isn't Chinese/Japanese. I also doubt any of the O-I (Insert Ton) would have been built, it would have been useless besides on the Chinese front, which there was a different kind of warfare that was being waged which did not require heavily armoured tanks.

Except they were built. The purpose of the tank was to act as a mobile bunker.

[Tolenka 383]

Ha ..would have been useless? Nope.
Chinese soldiers didnt had much to use against tanks, i would guess that this fat armored tank could reck´em all.

Exactly, their smaller tanks did the job much better than a super heavy could ever do, hence why none were built. It would have been a solution to a problem that really didn't exist.

 

 

Except they were built. The purpose of the tank was to act as a mobile bunker.

There is no solid evidence to support such a claim, besides a piece of track on display in some academy, which does not say much. The problem is the supposed prototypes straight disappeared off the face of the earth, all other prototypes in game had tons of documentation and usually at-least one surviving example (US is an excellent example of this). All this aside this tank would be extremely hard to implement into the game, and if it were implemented, it would mostly likely be with Tiger 2's, Super Pershings, and IS 2 1944's. 

Edited March 18, 2016 by Tolenka

[fufubear 6,705]

There is no solid evidence to support such a claim, besides a piece of track on display in some academy, which does not say much. The problem is the supposed prototypes straight disappeared off the face of the earth, all other prototypes in game had tons of documentation and usually at-least one surviving example (US is an excellent example of this). All this aside this tank would be extremely hard to implement into the game, and if it were implemented, it would mostly likely be with Tiger 2's, Super Pershings, and IS 2 1944's.

Evidence exists in the Japanese archives if you read around this subforum you would have known that.

[LORDOFKASE 100]

Exactly, their smaller tanks did the job much better than a super heavy could ever do, hence why none were built. It would have been a solution to a problem that really didn't exist.

 

 

There is no solid evidence to support such a claim, besides a piece of track on display in some academy, which does not say much. The problem is the supposed prototypes straight disappeared off the face of the earth, all other prototypes in game had tons of documentation and usually at-least one surviving example (US is an excellent example of this). All this aside this tank would be extremely hard to implement into the game, and if it were implemented, it would mostly likely be with Tiger 2's, Super Pershings, and IS 2 1944's. 

 

I believe that's the great peril of the O-1.  There's just enough evidence and reports that it was real, and Japanese accounting and record keeping was a combination of that bad/that destroyed at the end of the war that it leaves this little sliver of doubt that maybe, just maybe somewhere under a small hill in Manchuria there's 97 tons worth of metal in a vaguely massive tank arrangement.  

It was still a rubbish idea from the get-go.  Like in an alternate history wackiness sense it's fun to talk about, but compared to a lot of the other prototypes/weird ideas, this one falls well below the British Iceberg carrier in terms of reasonable plans.  

[fufubear 6,705]

As a mobile bunker it would have done well enough but imo it doesn't seem like a traditional heavy tabk.

[panzerpaddel 793]

Exactly, their smaller tanks did the job much better than a super heavy could ever do, hence why none were built. It would have been a solution to a problem that really didn't exist.

Well, until allies came, japanese tanks had a hard time when meeting anti tank weapons. When those allies came, japanese tanks suffered nightmares until they produced tanks with good guns.
The O-I so far would have been like the jagdtiger to the west-front- a nightmare you wouldnt want to meet.

 

[LORDOFKASE 100]

As a mobile bunker it would have done well enough but imo it doesn't seem like a traditional heavy tabk.

But rather the point of a tank is to have that mobility, of which the O-1 lacked.  There's not really a reason to have it, if you're looking to engage the enemy with it, they can just leave or travel where it simply cannot go (which for the O-1 is much more common than normal tanks).  If the enemy is stronger the O-1 cannot escape and isn't protected enough to fend off conventional tanks, or able to avoid air attack.  

There's a reason we don't see land battleships in use pretty much ever.
 

 

 

Exactly, their smaller tanks did the job much better than a super heavy could ever do, hence why none were built. It would have been a solution to a problem that really didn't exist.

Well, until allies came, japanese tanks had a hard time when meeting anti tank weapons. When those allies came, japanese tanks suffered nightmares until they produced tanks with good guns.
The O-I so far would have been like the jagdtiger to the west-front- a nightmare you wouldnt want to meet.

 

 

Japanese tanks never performed especially well against anyone's armor.  Even with larger guns they were still struggling against medium Allied tanks.  

That said I'd challenge you to find a place you could employ an O-1 in the Pacific.  A lot of those battlegrounds required major engineering efforts by the US to get the 30 ton Sherman to work, let alone something in the 100+ ton range.