Breaking the sound barrier. Without a plane.

techs

Lifer
Sep 26, 2000
28,559
4
0
http://www.wired.com/playbook/2012/10/red-bull-stratos-3/

Skydiver to become first man to break the sound barrier in a free fall.



Skydiver Felix Baumgartner has made some craaaaazy jumps over the years, including BASE jumping from Petronas Towers and the Tapei 101 skyscraper. Impressive, but nothing compared to his plan to skydive from 23 miles above the Earth next week.

The Austrian adventurer will ascend to 120,000 feet in a pressurized capsule and, wearing only a spacesuit and a parachute, jump. As he plummets earthward in what will be the highest skydive ever, Baumgartner will become the first person to break the sound barrier in freefall.

Crazy? Perhaps. But ‘Fearless Felix’ already has made two practice jumps, from 13 miles and 18 miles, that went perfectly. Well, almost perfectly.

Baumgartner’s capsule was damaged during a hard landing after his leap from 97,145 feet in July, necessitating a complete overhaul. It was completed last week, and with everything up to par, Red Bull Stratos technical director Art Thompson has declared all systems go. The launch window opens Oct. 8.

“I feel like a tiger in a cage waiting to get out,” the 43-year-old former military parachutist, a veteran of more than 2,500 jumps, said in a statement.


Baumgartner hopes to break the unofficial record Joe Kittinger, a retired Air Force colonel from Florida, set in 1960 when he jumped from 102,800 feet. He expects to free fall for at least five minutes (another record) and exceed the speed of sound, around 700 mph at that altitude. His jump comes 65 years after Chuck Yeager became the first person to break the speed of sound.

During his test jump in July, Baumgartner’s descent from 18 miles up took 10 minutes and 36 seconds, and he reached 536 mph during a freefall that lasted 3 minutes and 48 seconds.

Baumgartner will be carried aloft in a 2,899-pound capsule suspended beneath a 55-story helium balloon.
 

Ns1

No Lifer
Jun 17, 2001
55,420
1,600
126
Baumgartner will be carried aloft in a 2,899-pound capsule suspended beneath a 55-story helium balloon.

holy shit, need pics of 55 story helium balloon.
 

GobBluth

Senior member
Sep 18, 2012
703
45
91
Read this article earlier today. That is an amazing accomplishment. They seem worried (since the jump will be streamed online) that we may witness something horrifying i.e. eyes exploding from the pressure.

Tune in folks!
 
Oct 25, 2006
11,036
11
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I wonder what altitude he expects to hit the sound barrier at. He would have to be pretty damn high. I wonder what it feels like to hit a supersonic shock wave.
 

GobBluth

Senior member
Sep 18, 2012
703
45
91
I wonder what altitude he expects to hit the sound barrier at. He would have to be pretty damn high. I wonder what it feels like to hit a supersonic shock wave.

The article said he should hit 600+ (whatever mach 1 is) with about 100,000 feet to go. At least I think that is what I read.
 

acheron

Diamond Member
May 27, 2008
3,171
2
81
Random trivia: first man-made object to break the sound barrier was a whip. The cracking sound is a tiny sonic boom.

Cool story, bro.
 

sdifox

No Lifer
Sep 30, 2005
100,262
17,900
126
I didn't think you can break the sound barrier on freefall. Wiki says 320km/h.

edit: further down says 988km/h has been done. I guess higher altitude is the key.

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


Competition speed skydivers fly in the head down position and reach even higher speeds. The current world record is 988 km/h (614 mph) by Joseph Kittinger, set at high altitude where the lesser density of the atmosphere decreased drag.[2]
 

waggy

No Lifer
Dec 14, 2000
68,143
10
81
Random trivia: first man-made object to break the sound barrier was a whip. The cracking sound is a tiny sonic boom.

Cool story, bro.

yeah i read that too. kinda neat.


I wouldn't mind watching this. the guy is insane..
 

JTsyo

Lifer
Nov 18, 2007
12,034
1,133
126
If gas is expensive why not create a balloon with vacuum? You would get more buoyancy but I guess you would need a rigid frame and a fabric strong enough to hold 14 psi.
 

sdifox

No Lifer
Sep 30, 2005
100,262
17,900
126
If gas is expensive why not create a balloon with vacuum? You would get more buoyancy but I guess you would need a rigid frame and a fabric strong enough to hold 14 psi.


err, whut? if something is strong enough to withstand that kind of pressure, it ain't flying because it has too much mass.
 

JTsyo

Lifer
Nov 18, 2007
12,034
1,133
126
err, whut? if something is strong enough to withstand that kind of pressure, it ain't flying because it has too much mass.

An Al frame with a Kelvar type material that's air tight might hold up. Might not be possible with materials we have today though, just an idea.
 

sdifox

No Lifer
Sep 30, 2005
100,262
17,900
126
An Al frame with a Kelvar type material that's air tight might hold up. Might not be possible with materials we have today though, just an idea.

shit invent that material and you win Nobel for sure.