The reduced positive boyance optional GWX mod

[Thniper]

Originally Posted by Penelope_Grey

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/Tech...ten/index.html
sry, only in german

[Brag]

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

Originally Posted by Brag

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!

[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?

Originally Posted by Thniper

"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.

[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.

Originally Posted by 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.

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

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