Mitt on aircraft windows...

[howbouthemspurs]

Is it true that Romney could be more re ed than Bush? Obama has no compe ion! Its going to be a landslide for the President and republicans are going to continue crying.

[Wild Cobra]

Hint: you're not wrong either...

If you are saying I'm not wrong, but I am, then you must have missed at least one point I mentioned. If you are saying I missed a point, then please, by all means, explain.

It should be good.

[ElNono]

Why are you so hard headed?

It is so easy to verify what I say.

I didn't say you were wrong. You said I was wrong. I'm still waiting to hear why was I wrong...

You are looking like a total fool to everyone here.

How about from Spectral Calc?

That's an atmospheric pressure graph.

[ElNono]

If you are saying I'm not wrong, but I am, then you must have missed at least one point I mentioned. If you are saying I missed a point, then please, by all means, explain.

It should be good.

You're not wrong. As far as I can tell, you're telling me what the atmospheric pressure is at 10,000 ft. My statement was about oxygen pressure at 10,000 ft.

[ElNono]

Is it true that Romney could be more re ed than Bush? Obama has no compe ion! Its going to be a landslide for the President and republicans are going to continue crying.

Barry and Joe have their own share of slip-ups, tbh...

[Wild Cobra]

That's an atmospheric pressure graph.

Yes, it is.

At 10,000 ft, the oxygen percentage remains at 21%. The oxygen drops to about 70% of what it is at sea level, not to 1/3rd its amount at sea level.

What am I missing?

Please expose my ignorance.

[ElNono]

Yes, it is.

At 10,000 ft, the oxygen percentage remains at 21%. The oxygen drops to about 70% of what it is at sea level, not to 1/3rd its amount at sea level.

What am I missing?

Please expose my ignorance.

You're missing:

A) Units
B) Volume of air

If you take, say, a square foot of air at sea level and you measure the oxygen pressure, you're going to get about 19.6 kPa (196 hPa). If you take the same square foot of air at 10,000 ft and you measure the oxygen pressure, you're going to get about 7.1 kPa (or 71 hPa).

Again, what you point out isn't wrong. What I said isn't wrong either.

[Wild Cobra]

You're missing:

A) Units
B) Volume of air

If you take, say, a square foot of air at sea level and you measure the oxygen pressure, you're going to get about 19.6 kPa (196 hPa). If you take the same square foot of air at 10,000 ft and you measure the oxygen pressure, you're going to get about 7.1 kPa (or 71 hPa).

Again, what you point out isn't wrong. What I said isn't wrong either.

You don't get it.

Your 19.6 vs. 7.1 numbers are wrong.

Check more sources instead of the BS source you are relying on.

[ElNono]

Your 19.6 vs. 7.1 numbers are wrong.

For the Nth time, do tell

[ElNono]

BTW, here's a nice calculator:

http://www.al ude.org/oxygen_levels.php

Select ft for units, type in 10000, then look at the PaO2 line.

You can also see the SaO2 line which is the measurement you're using.

[ElNono]

At any rate, this thread got derailed enough...

[Wild Cobra]

For the Nth time, do tell

You want another source? Is that it?

Supplemental Oxygen for the General Aviation Pilot

At sea level, 760 mm atmospheric pressure, oxygen partial pressure is 159 mm. At 10,000 ft, these numbers are 523 and 110. In both cases, the oxygen partial pressure is at ~21%.

It doesn't matter if you use Pascals, Bar, PSI, etc. it's all exchangeable.

760 mm equals 101.3 kPa and 523 equals 69.7 kPa. 21% of these numbers are 21.3 and 14.6 kPa.

Again, your numbers are wrong.

Your 19.6 number equates to about 700 mm, or about 2500 ft. Your 7.1 kPa number equates to about 254 mm, off of Table 2 that ends at 25,000 ft.

Again, your number represents about 10,000 meters. Not 10,000 ft.

Do you know the difference between feet and meters?

[MannyIsGod]

It's not just the "sucking objects out"... the air density as al ude increases causes the well known Al ude sickness, which could end up in pulmonary or cerebral edema and can be fatal...

You flat out can't breathe at the height planes fly. There's not enough oxygen at that al ude.

[MannyIsGod]

Plenty of oxygen to 10,000 feet. I've flown at 8k VFR with vents open from Texas to Colorado in a unpressurized cabin with no issues.

Most airlines fly at 3 times that al ude and the oxygen exponentially gets lower as you go up. 10k feet has much higher oxygen levels than simply going to 12 or 15k for instance.

[MannyIsGod]

No it wasn't.

He was concerned and he is a layman on such matters.

Ignorant to the reasons, yes. Re ed, no.

Real malevolent the way liberals like you turn the focus on this rather than the aircraft's safety.

Door falls OFF private plane in flight and lands on golf course

LOL you're a layman and that doesn't stop you from thinking you're an expert in a lot of things.

[ElNono]

You want another source? Is that it?

Supplemental Oxygen for the General Aviation Pilot

At sea level, 760 mm atmospheric pressure, oxygen partial pressure is 159 mm. At 10,000 ft, these numbers are 523 and 110. In both cases, the oxygen partial pressure is at ~21%.

That isn't wrong, but it's not what I described. I already pointed out that the oxygen percentage is the same (21%) regardless of the al ude.

The oxygen pressure is what's different (that is, the amount of oxygen molecules on a given volume).

I just don't know how to dumb this down anymore so you get it, so it's just going to have to stay at this.

[Wild Cobra]

BTW, here's a nice calculator:

http://www.al ude.org/oxygen_levels.php

Select ft for units, type in 10000, then look at the PaO2 line.

You can also see the SaO2 line which is the measurement you're using.

Wrong on both accounts.

The PaO2 line matched with lung and arterial levels which are exchanging with CO2. When you have 7.1 partial O2, you also have 4.9 partial CO2.

You are not using atmospheric partial pressures. If that was your intent, you should have said so.

[ElNono]

Wrong on both accounts.

The PaO2 line matched with lung and arterial levels which are exchanging with CO2.

You are not using atmospheric partial pressures. If that was your intent, you should have said so.

Pa O2 = Pascal Oxygen (O2) Pressure Units. I've used Pascal Pressure Units from the get go. If you missed it, it's your problem.

[Wild Cobra]

I just don't know how to dumb this down anymore so you get it, so it's just going to have to stay at this.

Yes, I know. You are incapable of understanding what you see, so you cant dumb down something that is already dumb.

[MannyIsGod]

Most airlines fly at 3 times that al ude and the oxygen exponentially gets lower as you go up. 10k feet has much higher oxygen levels than simply going to 12 or 15k for instance.

Actually I'll have to go back and look at my equations for hydrostatic pressure of the atmosphere because now I'm doubting this but I do think it was an exponential function.

[ElNono]

Yes, I know. You are incapable of understanding what you see, so you cant dumb down something that is already dumb.

Still waiting to hear what's wrong with my statement... lol

[Wild Cobra]

Pa O2 = Pascal Oxygen (O2) Pressure Units. I've used Pascal Pressure Units from the get go. If you missed it, it's your problem.

I didn't miss anything. You did. Look at the graphic at the lower right of the link as you update the values. When it says 7.2 partial O2, the line is between 7 and 8 for lungs and arteries. It is between 14 and 15 for the atmosphere.

[ElNono]

I didn't miss anything. You did. Look at the graphic at the lower right of the link as you update the values. When it says 7.2 partial O2, the line is between 7 and 8 for lungs and arteries. It is between 14 and 15 for the atmosphere.

I'm not using atmospheric values. How many times I have to repeat that?

I'm stating pressure IN A GIVEN VOLUME.

[Wild Cobra]

Still waiting to hear what's wrong with my statement... lol

I already told you.

You fail to comprehend.

[ElNono]

Whatever Cobra...

lol Mitt