The reduced positive boyance optional GWX mod

[Nuoz]

I'm trying it. It's all good but my depth seems to depend on more than speed alone. I'm currently at 85meters having ordered 120, at 1 knots! wow. Anyone knows what gives?

[Penelope_Grey]

U-Boat lacks the necessary inertial drive to push itself downward. You are going too slow.

[Nuoz]

But shouldnt it mantain it's depth? If at one point i'm at 120 meters why should the boat ascend to 85 meters? It seems the deeper i go the more i will ascend. Oh boy :doh:

[Penelope_Grey]

like I said 1 knot is too slow to maintain depth. If you had set 2 knots, you should have stayed put.

[Thniper]

I always thought that an u-boat has zero buoyancy.:hmm:
In the book Das Boot it was said that the 'Regelzellen' were used for maintaining zero buoyancy.

Correct me if I'm wrong.

[ichso]

The meters you will rise when going slower than 2kn seem to fullfit a certain rate. As I tested it some time ago here are some examples:
set depth....rised to
...15...............12
...90...............73
..140............115

[Penelope_Grey]

No its not true, U-boats had a slightly positive bouyance. That is why GWX models a positive bouyancy in them.

[Thniper]

No its not true, U-boats had a slightly positive bouyance. That is why GWX models a positive bouyancy in them.

Well, what was the use of the 'Regelzellen' then?

Can you post a link where I can read about that buoyancy 'thing'?

Thanks in advance.

[ichso]

The regelzellen are indeed for some fine tuning when submerged but aren't enough to eleminate every postive boyuancy.

http://www.weltderwunder.de/wdw/Technik/Schiffe/UBoote/AufTauchstationmitdenNaturgewalten/index.html
sry, only in german :roll:

[Brag]

In RL it is extremly difficult to achieve neutral bouyancy or perfect zero bouyancy.

[Hadrys]

In RL it is extremly difficult to achieve neutral bouyancy or perfect zero bouyancy.

AFAIK they could only trim the boat not to "fall" with the bow or stern, just to keep it straight and when ascending/descending only pumping watter from bow/stern but not changing the trim volume. Also Das Boot book mentions about trimming every day to compensate food, water, diesel consumption. True.

However the deeper you go the smaller effect should it have. As I'm a diver it's very easy to keep 0 bouyancy at 40meter (especially using a wing not a "jacket") but you just take a deeper breath to start ascending quite fast when at 15-20m!

[Nuoz]

Thanks for the info guys. Now i get it. Still one may think when the captain ordered a certain depth the crew would make sure the ordered depth was achieved and kept.. Nevertheless now this makes sense to me.

[Hadrys]

Thanks for the info guys. Now i get it. Still one may think when the captain ordered a certain depth the crew would make sure the ordered depth was achieved and kept.. Nevertheless now this makes sense to me.

This was very hard, they needed to compensate non stop because in rough sea you can get in no time on the surface. Captain also needed to fight the scope up/down. When sub is moving with dive planes on dive a bit it's much easier because there is a constant force dragging down and it's better to go deeper than being shot to the surface in front of a DD :damn:

In game it gives some trouble but it's cool, I just set 14,5 meter periscope depth, not using P key.

[Thniper]

I can remember a passage from the book where the LI says:

"Man kann ein gut getrimmtes Boot sogar am Periskop aufhängen."

Well, I'll try a translation (my english is not as good so don't laugh):

"You can hang up your u-boat by the periscope if it's well trimmed."

Consequently the book (or LI) must be wrong here, right?

[Hadrys]

"You can hang up your u-boat by the periscope if it's well trimmed."
Consequently the book (or LI) must be wrong here, right?

Yes, I can remember it and there was an explanation how to do it - periscope getting out of the water changes boat volume. In theory - dead flat sea it's possible I think :)

I had such a problem as diving in a thick drysuit in salty water. 40 kg of iron on my back couldn't drag me down, after breathing out all air from my lungs my head was hanging just below the surface of the sea. No matter of waves ets. Of course it didn't last for minutes. The only way was to bend down and kick my foot ;) After it I was like a rock. Maybe these examples are not that accurate but quite imaginable as they are reallife.

[Sailor Steve]

The problem isn't just the speed. In real life water can leak in, creating negative bouyancy. They tried to trim for positive to counteract it. The problem is that you never run at 1 or 2 knots unless you're 'silent running', which means NO PUMPS. Pumps make a lot of noise. NYGM's negative bouancy 'Anti-Hummingbird' mod is more realistic; not because it goes down instead of up (either at random would be nice), but because it keeps doing it - it doesn't stop after two or three meters.

Best of all was Aces Of the Deep's 'silent running' mode: after a while you would start to sink, and the Chief would say "Impossible to maintain depth unless we turn the pumps on", at which point you had to either sink or secure from silent running.

[Hartmann]

The problem isn't just the speed. In real life water can leak in, creating negative bouyancy. They tried to trim for positive to counteract it. The problem is that you never run at 1 or 2 knots unless you're 'silent running', which means NO PUMPS. Pumps make a lot of noise. NYGM's negative bouancy 'Anti-Hummingbird' mod is more realistic; not because it goes down instead of up (either at random would be nice), but because it keeps doing it - it doesn't stop after two or three meters.

Best of all was Aces Of the Deep's 'silent running' mode: after a while you would start to sink, and the Chief would say "Impossible to maintain depth unless we turn the pumps on", at which point you had to either sink or secure from silent running.

Yes, commander edition also includes a buoiancy gauge with the water level in the bilge :yep:

[Kpt. Lehmann]

In a perfect world SH3 would allow us a means of controlling variable bouyancy. It does not.

Using the "reduced positive bouyancy" optional mod in GWX will allow you to achieve your desired depth as long as you have set a speed of at least 2kts.
Again, reduced positive bouyancy will become default in GWX v1.04. Using a lesser speed may result in acheiving less than your desired depth.

Removing positive bouyancy altogether would destroy the improved surface effects / interaction. (Surfaced U-boat behavior in GWX is more realistic than NYGM's surface dynamics IMHO.)

Using either mod, the player has to learn to live with minor quirks as a result of modding. In more than one way, SH3 doesn't give you enough string to tie your shoes properly. Adapt and overcome guys.:|\\

[Brag]

Using either mod, the player has to learn to live with minor quirks as a result of modding. In more than one way, SH3 doesn't give you enough string to tie your shoes properly. Adapt and overcome guys.:|\\


Kpt. Lehman,

My sea boots don't have laces. What do I do now? :88)

[Kpt. Lehmann]

Using either mod, the player has to learn to live with minor quirks as a result of modding. In more than one way, SH3 doesn't give you enough string to tie your shoes properly. Adapt and overcome guys.:|\\


Kpt. Lehman,

My sea boots don't have laces. What do I do now? :88)

Report the matter to Herr Flick of the gestapo at once.

[Brag]

Report the matter to Herr Flick of the gestapo at once.
__________________
http://i46.photobucket.com/albums/f117/KptLehmann/GWX-Dev-SigKnights1.jpg (http://www.users.on.net/%7Ejscones/GWX/)
It is better to live a short and meaningful life... than a long and miserable one.
http://www.subsim.com/radioroom/smartdark/user_online.gif http://www.subsim.com/radioroom/smartdark/report.gif (http://www.subsim.com/radioroom/report.php?p=582500)


"The zeeboots?" Herr Flick locked his steely gaze on the RK on my neck.
"ja, my zeeboots are not SH3 or GWX issue bootz. They are real zeebootz with no laces."
Herr Flick's steel rimmed glasses began to fog. "You are a trouble maker."
"Over zeeboots?"
"Ja, zeeboots."
"Zeeboots, zeeboots?
"Ja, everybody likes zeeboots:

Zeeboots, zeeboots
la la la la
zeeboots zeeboots . . .

[Kpt. Lehmann]

Herr Flick: "You may kiss me."

vonSmallhausen: "Yes Herr Flick."

Herr Flick: "No NO! vonSmallhausen... I was speaking to Helga!"

vonSmallhausen: "You could have told me sooner!"

Herr Flick: "That was thoroughly disgusting!"

[Brag]

Herr Flick: "You may kiss me."

vonSmallhausen: "Yes Herr Flick."

Herr Flick: "No NO! vonSmallhausen... I was speaking to Helga!"

vonSmallhausen: "You could have told me sooner!"

Herr Flick: "That was thoroughly disgusting!"

Zeebootz, zeebootz
la la la la
Zebootz zebootz

[Thniper]

Best of all was Aces Of the Deep's 'silent running' mode: after a while you would start to sink, and the Chief would say "Impossible to maintain depth unless we turn the pumps on", at which point you had to either sink or secure from silent running.

Yep! I totally agree with you.:yep:
With Aces of the Deep I had the most thrilling u-boat hours of my life.
Too bad it doesn't run on my system anymore.:down:

It's a pity that you can't mod SH3 that way...

[jiduthie]

dosbox will run AOTD on XP and probably vista. I also have gotten CAOTD running on an xp system although if i remember right it requires a sound patch, and a little finagling with compatability modes. a small amount of googling can turn up the needed software. Dunno if you run windows but i thought this might help.

[Thniper]

OFFTOPIC


dosbox will run AOTD on XP and probably vista. I also have gotten CAOTD running on an xp system although if i remember right it requires a sound patch, and a little finagling with compatability modes. a small amount of googling can turn up the needed software. Dunno if you run windows but i thought this might help.

Thanks!

I run XP with SP2 but couldn't get it started.

Now I'll give it another try.