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http://gizmodo.com/5950136/watch-the-fi ... t=53351226



TL;DR/W - Guy plans on floating in balloon some 22 miles above the Earths surface and subsequently jumping out in hopes of breaking the sound barrier.

Live Stream

Also, the Red Bull Stratos website has a game where you can get a watch if you guess closest to where he lands.

And here I thought this would be about the Red Bulls.

If destruction exists, we must destroy everything.
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Slaad Shrpk Breizh

Sonic boom would be lethal unless he was wearing a suit so heavily reinforced that there would be no difference between doing this and descending in a space capsule.

The entire thrill of jumping out of a plane is you, the air and the ground. I don't see the point of this.

Aestu of Bleeding Hollow...

Nihilism is a copout.

I guess they canceled it due to bad weather.

I'd get your point if he was in close proximity to the object creating the shock wave -- like, if the shock wave hit him -- but since he'd be traveling at a point of the shock wave (or slightly in front of it), wouldn't he be relatively unscathed as the shock wave emanates outward from, and behind, his location?

Listening to the live stream (which had to cancel the event today because of wind) brought up two points as I was typing this.
1) An aircraft traveling greater than the speed of sound creates a larger 'vacuum of air' to collapse on itself, producing a more powerful shockwave, than a human body would.
2) The air at that elevation has about 1/1000th the molecules of lower-atmosphere air, so the resulting shock wave will be less powerful.


Well, it's still going to be him, the air and the ground... it's just less air, a higher elevation, a capsule instead of a plane, and several world records to be broken in the process.


Yea, the wind started picking up again. I read that the balloon is made from a fabric that is about 1/10th the thickness of a sandwhich bag, so it's very fragile and doesn't work well with winds exceeding 3mph or something stupid.

I don't buy it. Craft that operate at/descend from that altitude are built to extreme specifications.

I simply don't see the point or appeal. If this were serious business it would be underwritten by some group less liability-averse than a soft drink corporation.

Aestu of Bleeding Hollow...

Nihilism is a copout.

Break the sound barrier? Let's see if I learned anything in physics. Wouldn't he reach terminal velocity before then?


idk what I just said

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Jet packs?

We have a winner.

Aestu of Bleeding Hollow...

Nihilism is a copout.

The man is going to be jumping in a pressurized suit, similar to what astronauts and other high-altitude pilots wear. The temperature is way too cold, the lack of oxygen would cause him to suffocate, and they said his blood could boil because the boiling point of blood, at that altitude, is lower than the human body temperature.


Except for the fact that the surface level wind speeds will impact the balloon on ascent, and this is also true for lower-level atmospheric winds (around the 800-1000ft range, I believe)


ok.


He's already done practice jumps from 96,000ft. What's an extra 30,000ft? Based on the news coverage and tweets, it seems millions of people see the appeal even if you don't.

And this is 'serious business' to Red Bull, since they've created countless events which they've hosted and sponsored. Be it jumping snow mobiles, motorcycles and cars over the length of a football field during New Years Eve events... or having extreme races like X-Alps and the Air Race... or just extreme events like the Rampage, Flutag and X-Fighter... or just sponsoring hundreds of people in various extreme sports.



From Wiki...

A free-falling object achieves its terminal velocity when the downward force of gravity (FG) equals the upward force of drag (Fd). This causes the net force on the object to be zero, resulting in an acceleration of zero.[1]

As the object accelerates (usually downwards due to gravity), the drag force acting on the object increases, causing the acceleration to decrease. At a particular speed, the drag force produced will equal the object's weight . At this point the object ceases to accelerate altogether and continues falling at a constant speed called terminal velocity (also called settling velocity). An object moving downward with greater than terminal velocity (for example because it was thrown downwards or it fell from a thinner part of the atmosphere or it changed shape) will slow down until it reaches terminal velocity.

Based on wind resistance, for example, the terminal velocity of a skydiver in a belly-to-earth (i.e.:face down) free-fall position is about 195 km/h (122 mph or 54 m/s).[2] This velocity is the asymptotic limiting value of the acceleration process, because the effective forces on the body balance each other more and more closely as the terminal velocity is approached. In this example, a speed of 50% of terminal velocity is reached after only about 3 seconds, while it takes 8 seconds to reach 90%, 15 seconds to reach 99% and so on.

Higher speeds can be attained if the skydiver pulls in his or her limbs (see also freeflying). In this case, the terminal velocity increases to about 320 km/h (200 mph or 90 m/s),[2] which is almost the terminal velocity of the Peregrine Falcon diving down on its prey.[3] The same terminal velocity is reached for a typical .30-06 bullet dropping downwards—when it is returning to earth having been fired upwards, or dropped from a tower—according to a 1920 U.S. Army Ordnance study.[4]

Joseph Kittinger hit 988 km/h with his 100,000ft jump. I'm guessing the lower atmospheric resistance at higher altitude, along with good form, allows for greater terminal velocity?

Edit: Aestu picking winners is always a laugh.

It's remarkable that you have such a high opinion of your judgement yet you fall for something so trite, and despite your high estimate of yourself you think that the opinions of "millions of people" is a good gauge of anything.



Fatalities?



You're still talking about breaking the sound barrier with an object about as aerodynamic as a truck. And what exactly happens when he descends to the stratosphere travelling above terminal velocity at that altitude?



Quite the contrary. I doubt they'd make such a spectacle only to blueball.

They'll probably go through with it, whether the thing is legitimate (how would you know he went past the sound barrier than them saying so?) or anything other than very expensive trivia is another.

Real "extreme" activities are dangerous. Danger means the odd man draws the black ticket. Death on camera means lawsuits and bad PR. Like I said I just see this as very expensive trivia.

Aestu of Bleeding Hollow...

Nihilism is a copout.

Sorry, champ. You're talking about the appeal of an event and how "you don't see it", and I'm simply pointing out that millions of others do. Call it manufactured if you want, but if individuals are talking about it on twitter, and if news agencies are reporting on an attempt to break a world record... then, just maybe, there's more to it than your crazy ass assertions.

Irrelevant?

It's clear you don't understand what terminal velocity is.

First, he's jumping from the stratosphere, not descending from the mesosphere. Secondly, a person with their arms and legs tucked tightly together, with their head pointing towards the ground, can achieve a higher terminal velocity since there is much less resistance. If he breaks this form and goes into a flat fall, like what you normally see in sky diving, he'll hit a lower terminal velocity. When he deploys his parachute, the terminal velocity get's even lower. If he reached terminal velocity while having his parachute open, and then he released himself from the parachute, then his terminal velocity will increase.

We know, for a fact, that the air resistance at super-high elevations is much lower than that of the ground, causing less drag. Because there is less drag, he can achieve a higher terminal velocity. Fanta originally asked if he would hit the terminal velocity before breaking the sound barrier, and I'm saying that might not be the case. At his altitude, with his equipment, form, and mass, it's possible he could break 1,225.1 km/h. Kittinger was able to reach 988 km/h from a lower altitude.

Probably the same way any ground station can judge the speed of an object falling through the air and/or space; a network of sensors (like accelerometers and altimeters) and a team of professionals (physicists, mathematicians and aerospace experts) to interpret the data.

BRB. Trying to patent some new extreme sport ideas... Extreme Commuting to Work, Extreme Showering for the Elderly, Extreme Poison Drinking and Extreme Negro at a Klan Meeting.

Companies protect themselves with waivers and contracts. Live events, like this, often have delays to protect viewers from seeing people die... And when those fail, well, How many people sued Fox News last week when that guy killed himself on live TV?

If you are using majority opinion (or the illusion thereof) as a gauge of what is and is not real then you are a fool. It is that simple.

Then again there are many fools in this world. No? Do you disagree?

The news and twitter are meaningless as measures of relevance. This is the same news that can't stop talking about Kardashian, and the entire appeal of twitter is that social media consultants can make the trivial seem relevant by twittering all day about garbage.

MySpace generation at work.



If it's that simple, why wasn't this done decades ago? Conversely, why was the first supersonic flight a flight and not a fall?



A car chase is not comparable to a staged event.

Like I said, it will probably happen, it's staged trivia, if there were anything to it it'd be done by some organization more consequential than a soft drink company.

Aestu of Bleeding Hollow...

Nihilism is a copout.

That was my first thought.

Air is thinner higher up, so I wonder if that's how.

I think some people think that the "terminal" in "terminal velocity" means the same as the "terminal" in "terminal cancer." It doesn't. It means that the object in question has reached the greatest speed it will attain traveling in a particular direction.

I'm not sure it's physically possible, even from that height, for a person to reach the speed of sound. I'd bet the people doing this have probably done more math on the subject than I have (to be fair, I've done none).

It's still pretty cool if you think about it. It's the ultimate HALO jump.

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