DCS and Hypoxia

[[FD]Ripper]

Recently I was flying my A-10C and decided to shut down the system of oxygen at FL250 to feel the effects of hypoxia, to my surprise nothing happened.

 

I tried the same thing with the Huey at FL190 and also nothing happened!

 

Removed the effect of hypoxia??

[Boomer]

I think you need to be angels 20+ to see the effect, although I never tested it.

[EtherealN]

Opened the doors / canopy?

 

Do note though that 25k feet is lower than Mt. Everest, and people have climbed up there even without oxygen. So don't expect instant hypoxia at that level.

 

FL190 is also something I doubt should be that bad of a problem, though easier if you're local to the Himalayas than if you're local to the great plains, of course.

[Flamin_Squirrel]

Recently I was flying my A-10C and decided to shut down the system of oxygen at FL250 to feel the effects of hypoxia, to my surprise nothing happened.

 

I tried the same thing with the Huey at FL190 and also nothing happened!

 

Removed the effect of hypoxia??

 

The A-10C has a pressurised cabin, so although you're at FL250 your cabin will be lower.

 

In short, not only do you need to turn off oxy, you need to go to your cabin air conditioning panel and select dump, or ram. Your cabin altitude will then start rising.

[Cookie]

Well, the manual states (page 159):

 

It will be important that you mind your oxygen supply. If it runs out and you are above 18,000 feet, you will suffer the effects of hypoxia and lose consciousness.

[[FD]Ripper]

Well, the manual states (page 159):

 

not work here ! :(

[TX-EcoDragon]

http://en.wikipedia.org/wiki/Time_of_useful_consciousness

[badger66]

The A-10C has a pressurised cabin

 

Some how , I don't believe that !!! Source please .

 

Get up to 20thou , and you will see double vision .....when it first happened to me I thought my graphic card was on the way out , until someone reminded mre to check O2 supply ..... then it was ok .

[Robert1983NL]

Depending on the individuals physical state, hypoxia can already kick in around 8000-10000ft, although it will take some time, like 30 mins at least, I can't recall these times exactly. At altitudes of around 27000 feet, expect to have around 2-3 minutes of consciousness. I did this myself in a hypobaric chamber and I lasted a little over five minutes before getting back on oxygen.

 

The thing is, how would you want to see this simulated in DCS??? You can not simulate an increased heartrate, low blood saturation, loss of mental capability, euphoria, etc etc... maybe the screen could be made blurry, but that's about it I think.

[sobek]

Some how , I don't believe that !!! Source please .

 

It is pressurized by the bleed air system. There's a cabin alt gauge in the pit, try to switch the bleed air off at altitude and you can see the cabin altitude rise.

[howie87]

The thing is, how would you want to see this simulated in DCS??? You can not simulate an increased heartrate, low blood saturation, loss of mental capability, euphoria, etc etc... maybe the screen could be made blurry, but that's about it I think.

 

Yep... That's exactly how this is simulated in DCS. Along with the eventual lack of consciousness.

 

The A-10 cabin is indeed pressurised. On the right of the cockpit is the environmental system panel with the cabin air pressure gauge and switch to set between normal, dump and ram air pressure.

 

There are also a main air supply and bleed air switches which affect the environment control system (I'm not exactly sure how as this is poorly explained in the manual).

[Feuerfalke]

I had hypoxia in DCS several times before.

 

2 times after taking damage and once after forgetting to switch oxygen on :music_whistling:

 

 

But it doesn't work like: Alt 10.000 ft + no oxygen = blackout.

 

Infact, it took my pilot quite a while to black out, so I didn't combine the damage with the effect at all.

[26-J39]

I believe there is a genuine problems here, I noticed it in the Huey yesterday.

 

I flew up to about 21k, no hypoxia but even stranger the free air temp never changed at all. Seems to me like the temp and pressures are not varying with altitude.

[Robert1983NL]

Where's the temp gauge? Thought it was missing!

[26-J39]

Where's the temp gauge? Thought it was missing!

 

Front, Center & up a bit.. :)

[TimeKilla]

I believe there is a genuine problems here, I noticed it in the Huey yesterday.

 

I flew up to about 21k, no hypoxia but even stranger the free air temp never changed at all. Seems to me like the temp and pressures are not varying with altitude.

 

The Huey went up to 21K? :doh:

[Feuerfalke]

I believe there is a genuine problems here, I noticed it in the Huey yesterday.

 

I flew up to about 21k, no hypoxia but even stranger the free air temp never changed at all. Seems to me like the temp and pressures are not varying with altitude.

 

It does, since IAS changes with altitude. On BS depending on altitudes, icing starts as well (well, it's most obvious with the BS). But the thermometers don't work. They just show the set temp in mission-designer.

 

AFAIK it's been like this since BlackShark.

 

(Nice touch of immersion, though, if you think the temps don't change because the cockpit-thermometer doesn't change ;) )

Edited May 19, 2013 by Feuerfalke

[sobek]

The BS temp gauge works now. The Huey one doesn't. Air temperature is dependant on altitude.

[Robert1983NL]

Well... who knows, maybe the temperature doesn't change with altitude. There's no way to tell if the temp gauge or the weather model is defective...

[26-J39]

It does, since IAS changes with altitude. On BS depending on altitudes, icing starts as well (well, it's most obvious with the BS). But the thermometers don't work. They just show the set temp in mission-designer.

 

AFAIK it's been like this since BlackShark.

 

(Nice touch of immersion, though, if you think the temps don't change because the cockpit-thermometer doesn't change ;) )

 

The BS free air temp guage does actually work now & has for awhile, just like it should in the huey but no go. I just confirmed it again to b sure. So.. the huey temp gauge prob seems to be in the huey model not DCS world.

 

Edit: " The Huey one doesn't." - sobek

 

Ahh, thank you.

[Feuerfalke]

The BS temp gauge works now. The Huey one doesn't. Air temperature is dependant on altitude.

 

One more hint that I didn't fly the Shark often enough lately :(

[boquinauer]

In real life, you need around 20 minutes or so to pass out at 20000ft because of the hypoxia. It's not instantaneous. Although you start feeling weird after 5 minutes at that altitude. Concentration becomes difficult and you're unable to do simple math operations.

 

Everyone has a first symptom when he starts feeling hypoxic. Each person has it's own. I had the chance to experience hypoxia at 19000ft and mine was that I felt my shoulders like heavier.

 

The time of useful conciousness (TUC) diminishes the higher you fly. At 40000 feet it's only a few seconds.

 

Maybe you should try, removing the oxygen supply at 20000 feet for 25-30 minutes and see what happens.

 

 

 

 

Cheers

[sobek]

You can expedite the process by depressurizing the cabin (there's switches for that on the environmet panel as previously mentioned) if you're just in it to see the graphical manifestation in DCS.

[Megagoth1702]

Go up very high, depressurize the cabin, oxygen off etc. Blow off the A-10 canopy if you want to. Accel time. enjoy. Works 100%, screen getting blurry, dark and at some point you won't be able to control the aircraft.

[Cookie]

at some point you won't be able to control the aircraft.

Rumor has it there are times I can´t control the aircraft even though I am fully conscious... :prop: