Oxygen and food... ethernal?

[abclkhan]

Greetings to all

In real life it was surely possible to increase the time until the boat runs out of oxygen by reducing the size of the crew. But in SH3, we can stay submerged for no longer than 34hours. Is it possible to fix this with a mod?

Second, food starvation was a real problem at sea, and its not modeled in SH3. A mod could model this by avoiding crew members to recover from fadigue status.

So, am I a stupid camel for raising these questions? Or are they valid questions? Whats ur opinion? Can someone do it?
Thanks!

abclkhan

[Philipp_Thomsen]

Originally Posted by abclkhan

Greetings to all

In real life it was surely possible to increase the time until the boat runs out of oxygen by reducing the size of the crew. But in SH3, we can stay submerged for no longer than 34hours. Is it possible to fix this with a mod?

Second, food starvation was a real problem at sea, and its not modeled in SH3. A mod could model this by avoiding crew members to recover from fadigue status.

So, am I a stupid camel for raising these questions? Or are they valid questions? Whats ur opinion? Can someone do it?
Thanks!

abclkhan

Reduce the amout of used oxigen by reducing the crew number? nope...
Mod food starvation to end mission in sh3? the best you can do is to replace the diesel bar for a food bar and use that to limit your trip. You can change the amout of fuel to simulate quantity of food, but funny enough, no food will be consumed if you're submerged or stationary.

[Letum]

A little besides the point, but running out of O2 is not a big problem in a u-boat. They
can carry enough oxygen for a few months underwater if they needed to. The problem
is the CO2 which poisons the crew.

In a sealed room the CO2 will kill you a very long time before the lack of O2 does.

[Sailor Steve]

Really? I always thought carbon dioxide, unlike carbon monoxide, wasn't really a poison - you just can't breath it. It's an inert gas. As we breath in O2, we breathe out CO2. Not having oxygen to breath is a definite problem. Also, in a truly sealed room like a submarine, unless there's some way to reconvert the oxygen, you have about 48 hours' worth, and that's it. Of course my memory is of things I refused to learn 40 years ago, so that's what it's worth.

As for the original question, they did have emergency masks with air for some time, but they were meant for escaping from the boat, not surviving inside for extended periods.

As for food, crew starvation was NOT a real problem, at least for u-boats. I've never read a report of a submarine crew starving, or even coming close.

[abclkhan]

I agree in which concerns to CO2. Indeed, it brings you to narcosis, respiratory acidosis and later cardiorrespiratory arrest.
BUT a smaller crew will produce a smaller amount of CO2 thus leading to an extended time until its levels get high.
So, what about a mod you apply when you start the patrol, capable of changing the increase rate in CO2 levels? The mod could do this simply by reading the size of your crew. Could be even an add on to sh3 commander.

Thomsem:
I was thinking about a new fatigue model based on food reserves. Recovery would be as usual until for example, after 3 months at sea, when it would be impossible to recover the crew. To use the diesel bar is not a good option. I wouldnt place any bars, just some kind of information about the endurance of each uboat.

[rifleman13]

Originally Posted by Sailor Steve

As for food, crew starvation was NOT a real problem, at least for u-boats. I've never read a report of a submarine crew starving, or even coming close.

Because they are at sea!

They use torpedoes to harpoon the whales!:rotfl::rotfl::rotfl:

They use the firearms on board to shoot at the fish!:rotfl::rotfl::rotfl:

That's how they survive long after the ham, the sausages, the bananas and oranges expire!

[Letum]

Originally Posted by Sailor Steve

Really? I always thought carbon dioxide, unlike carbon monoxide, wasn't really a poison - you just can't breath it. It's an inert gas. As we breath in O2, we breathe out CO2. Not having oxygen to breath is a definite problem. Also, in a truly sealed room like a submarine, unless there's some way to reconvert the oxygen, you have about 48 hours' worth, and that's it. Of course my memory is of things I refused to learn 40 years ago, so that's what it's worth.

The reason it's a poison and not just an inert gas is because it actually replaces the O2
in the blood, preventing more O2 entering your blood stream. Carbon monoxide is far
worse because it more permanently replaces the O2 in your blood. CO2 will drop back
out of your blood stream as soon as you return to a low CO2 environment.
It also makes your blood more acidic and triggers some of your bodies protection
systems.

At 8% CO2 you will be totally unable to operate a sub.

In the 1940s they did not have effective CO2 scrubbers. It's not very hard to store
pure O2 in large quantities, but it's no use if it's all being replaced by CO2.

Originally Posted by abclkhan

Thomsem:
I was thinking about a new fatigue model based on food reserves. Recovery would be as usual until for example, after 3 months at sea, when it would be impossible to recover the crew. To use the diesel bar is not a good option. I wouldnt place any bars, just some kind of information about the endurance of each uboat.

Yer, someone had a go at this. you might wanna search around for it. It worked quite well.

[Sailor Steve]

Originally Posted by Letum

The reason it's a poison and not just an inert gas is because it actually replaces the O2
in the blood, preventing more O2 entering your blood stream. Carbon monoxide is far
worse because it more permanently replaces the O2 in your blood. CO2 will drop back
out of your blood stream as soon as you return to a low CO2 environment.
It also makes your blood more acidic and triggers some of your bodies protection
systems.

At 8% CO2 you will be totally unable to operate a sub.

In the 1940s they did not have effective CO2 scrubbers. It's not very hard to store
pure O2 in large quantities, but it's no use if it's all being replaced by CO2.

Aha. As I like to say, the things I know would fill several big books; the things I don't know already fill millions of big books.

Thanks for the explanation.

[Sag75]

Yes, the carbon monoxide affinity for emoglobin is 200 time stronger than oxigen! so oxigen can't replace CO anymore in blood vessels...

[abclkhan]

This is great we obviously have a consensus here about carbon dioxide.
But, back to the point, what about a mod reducing CO2's rise speed in smaller crews?
And the food? That would be so great!!!!

Anyway, my objective with this thread is to put the topic in evidence, maybe some enlighted modder chooses to solve this unrealistic situation giving us an even better game.
Questions sugestions on how to build it are welcome.

[danurve]

abclkhan; I don't know if this will help or wizz on the fire, but about a year ago I was wondering the same thing about reducing the crew and Oxygen. While I agree some control over this would be great for the game, the way it was explained to me is because of the games hard code(s) this is another element that can't be changed.

[Letum]

For each crew member the time until the CO2 level is toxic would only change by about 2%.
The VIIC had a crew of between 44 and 52 men wich means there is the potential to save 16%.
Thats roughly an extra 7 1/5 hours on the advratised underwater endurance of 45 hours in the VIIC.:hmm: