Red Bull Stratos Jump

Plenty more where this came from. :-)
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Yeagers not the only one who is unimpressed

Sent from my Android mobile device.
 

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Minuteman said:
The speed of sound is affected by the ambient air temperature only (at least until you get way higher up into ionized gas). For a ways above the tropopause (~FL335) the speed of sound is constant-ish because the temperature stays constant-ish (~570 knots). Around 60,000 feet the temperature starts to increase in two linear segments (in 1976 atmospheric model). At 120,000 feet the speed of sound would be about 605 knots at -32°C.

I think it's fair to call is honestly breaking the speed of sound. I don't know how fast he got, but if he broke the speed of sound there, he'd be making shockwaves and sonic booms and all that.
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So is the speed of sound affected by temperature as a factor of density? I only ask because the speed of sounds seems to decrease with altitude, decrease in density, and it is much faster under water, much higher density.
 
Pilotforhire587 said:
So is the speed of sound affected by temperature as a factor of density? I only ask because the speed of sounds seems to decrease with altitude, decrease in density, and it is much faster under water, much higher density.
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Yeah I always thought it was density and temp, humidity and altitude were factors that affect density, so indirectly they impact the speed.

Also, dumb questions, I am curious what the heating was like as he entered the thicker atmosphere and how did they get the capsule down?
 
Matt13C said:
Also, dumb questions, I am curious what the heating was like as he entered the thicker atmosphere and how did they get the capsule down?
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I am not a rocket scientist, but I did stay in a Holiday Inn Express last night..

He was not going anywhere near fast enough for friction to create any significant heating. Despite the hype of "space jump 2012" he wasn't anywhere near the altitude and velocity of a deorbiting spacecraft.

The capsule cutaway from the balloon and had it's own parachute. If for some reason he could not jump on his own, then the plan was to ride the capsule down.
 
USMCmech said:
I am not a rocket scientist, but I did stay in a Holiday Inn Express last night..

He was not going anywhere near fast enough for friction to create any significant heating. Despite the hype of "space jump 2012" he wasn't anywhere near the altitude and velocity of a deorbiting spacecraft.

The capsule cutaway from the balloon and had it's own parachute. If for some reason he could not jump on his own, then the plan was to ride the capsule down.
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Yeah, I didn't expect him to be a streaking fireball but with the large speed decrease from 100k @ 833mph down to 20k@ 200mph(ish) I was thinking there might be some heating, 50 degrees maybe? Enough to warm him up some ha.

Cool.
 
Oh the propagation of sound in solids and liquids is a wicked, sinful business. :)

Sound propagates in a gas only at fast as the molecules in that gas can transfer kinetic energy among them ("kinetic theory of gases"). In the atmosphere, this is a function of the "mean free path" between molecular collisions. As the distance of that path decreases, more collisions occur and the speed of sound propagation will increase. Measuring the temperature of a gas is kind-of measuring the kinetic energy being transferred to the thermometer by the collisions within that medium. More collisions occurring means more energy being transferred, which will result in a higher temperature measurement. (*Minuteman's lousy explanation of how an ideal gas works)

Assuming Felix reached Mach 1.24 around 60,000 feet, where the ambient temperature is around -57°C, his stagnation temperature would have been +10°C (50°F). Water would boil at that altitude at 28°C, which is well below his body temperature. Fortunately the time of useful consciousness is only five seconds.
 
Minuteman said:
Oh the propagation of sound in solids and liquids is a wicked, sinful business. :)

Sound propagates in a gas only at fast as the molecules in that gas can transfer kinetic energy among them ("kinetic theory of gases"). In the atmosphere, this is a function of the "mean free path" between molecular collisions. As the distance of that path decreases, more collisions occur and the speed of sound propagation will increase. Measuring the temperature of a gas is kind-of measuring the kinetic energy being transferred to the thermometer by the collisions within that medium. More collisions occurring means more energy being transferred, which will result in a higher temperature measurement. (*Minuteman's lousy explanation of how an ideal gas works)

Assuming Felix reached Mach 1.24 around 60,000 feet, where the ambient temperature is around -57°C, his stagnation temperature would have been +10°C (50°F). Water would boil at that altitude at 28°C, which is well below his body temperature. Fortunately the time of useful consciousness is only five seconds.
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two things:

1. Your avatar (Yolandi Vi$$er from Die Antwoord) is awesome. I'm prepared for any rocks that may be hurled by this statement, but: she's hot.

2. Interesting data you posted!

I did not watch a lot of the coverage of the jump but it did seem to me that there was very little reference to Joe Kittengers jump.
 
Oh sure, gotta die sometime, but if I'm gonna die doing something crazy like that I'm gonna make sure my kids have plenty of dollars as a result. :)
 
Matt13C said:
Yeah, reading that dudes book, while interesting, made me feel as though he is incredibly full of himself. He was part of a huge leap forward for aviation, was a great pilot and had many interesting experiences in his life but none of it makes him better than anyone else. Dude needs to get over himself.

On this jump, simply amazing.
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Probably still pissed off he wasn't one of the Mercury 7
 
CFI A&P said:
One of the few non arrogant stories I've heard of Yeager was from another forum:

My best story to maybe prove the point. 1978, just got the Pitts, my wife and I drove to Oskosh.... I went into big hangar restroom to take a leak, was wearing jacket with big Pitts patch on back. As I washed my hands a guy asked if I had a Pitts and when I said yes his eyes sort of lit up and he asked if it was here. I said , no.....He srugged and comented, "Pitts is one of the finest single engine aircraft I've ever flown" I asked, "Do I know you?" He stuck out his hand,

"Chuck Yeager, nice to meet you" We walked out of the john he with his arm around my sholders and we parted.
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Did he at least wash his hands first? Did he double tap his foot under the stall? I'm getting a bad vibe!
 
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