Forums: Skydiving: General Skydiving Discussions:
Highest Hot Air Balloon Jump

 


Beerlight

Feb 3, 2004, 11:27 AM
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Highest Hot Air Balloon Jump Can't Post

Anyone have the video from the 40K hot air balloon jump that took place at Edwards AFB, CA about 6 or 7 years ago? It was on TV, not sure what the show's name was. The balloon was circled by an F-16 filming some of the footage, as well as great on-board footage. One of the guys that jumped, had his oxygen turned off accidentally, and went unconcious from hypoxia. I'd like to use that vid in one of my classes.

Thanks,

Buck


chuteless  (D 41)

Feb 3, 2004, 11:55 AM
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Re: [Beerlight] Highest Hot Air Balloon Jump [In reply to] Can't Post

I doubt he got to 40K on hot air alone. He must have had helium as well.


Beerlight

Feb 3, 2004, 12:21 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

Bill,

I see your point. But, supposedly they used special burners that would ignite in the rarefied air. If I remember correctly, they had to re-ignite the burners on several occasions due to oxygen starvation problems. I think their final altitude was something like 43K. I'm checking with some of my Air Force (AF) brethren that might have worked on the project. It was co-sponsored by the AF.


dkf1979  (Student)

Feb 3, 2004, 12:23 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

Is this the guy you're asking about? Joe Kittinger? He holds the record for the highest altitude skydive. 102,000 FEET!!! He said when he left the balloon it didn't even feel like he was falling. Because of the lack of air resistance. Thought he had gone above the gravitational pull. First man to break the speed of sound without an aircraft!!!

http://www.stratoquest.com/default.cfm?page=5
http://www.pbs.org/.../escape/skydive.html


dkf1979  (Student)

Feb 3, 2004, 12:28 PM
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Re: [dkf1979] Highest Hot Air Balloon Jump [In reply to] Can't Post

well, almost broke the speed of sound. Crazy


chuteless  (D 41)

Feb 3, 2004, 12:32 PM
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Re: [dkf1979] Highest Hot Air Balloon Jump [In reply to] Can't Post

he would have broken the Speed of sound if he had not used a drogue chute to stabilize himself in the rarified atmosphere.

He did hit over 500 MPH, the Speed of Sound approx 680 MPH

Good jump nevertheless. Imagine that one in your log book.!!!!


dkf1979  (Student)

Feb 3, 2004, 12:43 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

says he peaked at 614 mph. damn.


Beerlight

Feb 3, 2004, 12:44 PM
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Re: [dkf1979] Highest Hot Air Balloon Jump [In reply to] Can't Post

sorry. Joe is not the guy. These guys were specifically trying the highest "hot air" balloon jump. Joe Kittingers' was a sealed envelope.

thanks though........


chuteless  (D 41)

Feb 3, 2004, 12:51 PM
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Re: [dkf1979] Highest Hot Air Balloon Jump [In reply to] Can't Post

I know Joe opened "high", but imagine if someone was already opened and Joe passed close to him still in freefall. Wouldnt that guy do a double take? LOL


FrogNog  (C 34484)

Feb 3, 2004, 1:12 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

In reply to:
he would have broken the Speed of sound if he had not used a drogue chute to stabilize himself in the rarified atmosphere.

He did hit over 500 MPH, the Speed of Sound approx 680 MPH

Good jump nevertheless. Imagine that one in your log book.!!!!

What was the speed of sound at his exit altitude? Doesn't the speed of sound decrease as the medium becomes more compressible?


chuteless  (D 41)

Feb 3, 2004, 1:31 PM
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Re: [FrogNog] Highest Hot Air Balloon Jump [In reply to] Can't Post

Im not sure what the speed of sound would be at his altitude, but the most generally used figure is 680 MPH, and I would think that is at MSL.

Some easy research onthe net should solve that question.

Bill Cole D-41


chuteless  (D 41)

Feb 3, 2004, 1:40 PM
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Re: [FrogNog] Highest Hot Air Balloon Jump [In reply to] Can't Post

I just checked out the Speed of sound on the internet.

I guessed that the temperature at 102000 ft would be -60 C, and I clicked on the site and all the other data based on that Celcius temperature potpped in

It reads:

-60 C = -76F

which gives 294.799 Meters per second

967.1916 Feet per second

660.352 Miles per hour

That is the speed of sound with tghe Temperature at 102000 feet "GUESSED" at -60 celcius.

I al;so checked out the Speed of sound with a proposed temperature of

+ 20 Celcius which equals

68 F......which gives the speed of sound as

343,599 Meters per second

1127.296 feet per second

769.664 Miles per hour

This indicates that the Speed of sound increases as the temperature increases, and I would think this would take into consideration that the increase in Temp would also mean heavier atmosphere.

Bill Cole D-41


(This post was edited by chuteless on Feb 3, 2004, 1:56 PM)


elfanie  (B 27003)

Feb 3, 2004, 1:59 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

In reply to:
I know Joe opened "high", but imagine if someone was already opened and Joe passed close to him still in freefall. Wouldnt that guy do a double take? LOL

I'm just trying to figure out how you'd spot that high up...
Not like you'd see the dropzone...right? Wink

That would be an amazing jump.


mjosparky  (D 5476)

Feb 3, 2004, 2:08 PM
Post #14 of 20 (2214 views)
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Re: [elfanie] Highest Hot Air Balloon Jump [In reply to] Can't Post

In reply to:
In reply to:
I know Joe opened "high", but imagine if someone was already opened and Joe passed close to him still in freefall. Wouldnt that guy do a double take? LOL

I'm just trying to figure out how you'd spot that high up...
Not like you'd see the dropzone...right? Wink

That would be an amazing jump.

Just like any other jump, 5 right, 5 right, 5 right, 10 left and cut.
Sparky


Beerlight

Feb 3, 2004, 2:57 PM
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Re: [mjosparky] Highest Hot Air Balloon Jump [In reply to] Can't Post

Guess you'd call this a hijacked thread!!!!Sly


But really, it was a hot air balloon jump, 40,000 feet or a lil higher, Edwards AFB, sometime in the early 90's.

TOMMY LAND if your out there I know you set up the oxygen console for the jump I'm talking about!!!

TOMMY..........HELP!!!! or any of the phyz techs that were at Edwards then.


TribalTalon  (A 44635)

Feb 3, 2004, 4:12 PM
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Re: [Beerlight] Highest Hot Air Balloon Jump [In reply to] Can't Post

wroooooooong. the speed of sound DECREASES as the altitude increases. Think about it. Sound travels much much faster in water. Why? because water is very dense, and this is also why sound travels better on cold, humid days. Therefore you could think that sound travels better at high altitudes since its so cold up there, but the air pressure at that altitude is much less, and the density as a result is very miniscule. i dont have the willpower to go back to my books and figure out what the speed of sound was at that high altitude, but it's less then 680 mph. 680 mph is at ground level. Sorry i'm pretty brief in describing it but i'm extremely worn out and was just dropping in to make a correction. Smile


chuteless  (D 41)

Feb 3, 2004, 4:27 PM
Post #17 of 20 (2166 views)
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Re: [TribalTalon] Highest Hot Air Balloon Jump [In reply to] Can't Post

In establishing the figures I posted, I guessed at the temperature. I believe the temperature stays about the same all the way to infinity, once you reach a certain altitude, ( I think somewhere around 50,000 feet.)

I also stated that the 680 was MSL, but if you lookat the figures for -60Celcius, It seems about right or close to it.

Bill Cole D-41


Beerlight

Feb 3, 2004, 4:43 PM
Post #18 of 20 (2154 views)
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Re: [Beerlight] Highest Hot Air Balloon Jump [In reply to] Can't Post

Yep Buck, you got hijacked..........Crazy


bch7773  (C License)

Feb 3, 2004, 6:49 PM
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Re: [chuteless] Highest Hot Air Balloon Jump [In reply to] Can't Post

speed of sound at sea level: 761 mph
speed of sound at approx 40k ft: 660 mph


looking at a few websites, I finally found one that has a non-bugged speed of sound calculator.

http://www.aerospaceweb.org/...osphere/q0102c.shtml


but it appears as though the speed of sound at 100k ft, where that other guy jumped from, is 675 mph., so it doesn't vary uniformly with altitude.


jwillwon3

Jun 30, 2012, 9:10 PM
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Re: [Beerlight] Highest Hot Air Balloon Jump [In reply to] Can't Post

I have that video and was part of the team. Jeff Sobolik, main jumper (his prodject) JayJay Johnson cameraman jumper from the Wings of Blue AirForce skydive team, Scott Cox was the onboard oxygen monitor and Major Ron Rosepink piloted the balloon. Jeff was 200 feet off the deck when he unstowed the brakes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Crazyme jwillwon3@yahoo.com



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