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Old 10-14-12, 06:13 PM   #61
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whooop whoop! It's a cool day to own a Zenith Watch Hopefully everyone doesn't go out and buy one and play them out like Panerais

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Old 10-14-12, 06:19 PM   #62
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It was awesome glad I watched it pretty insane. And glad he landed safely
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Old 10-14-12, 07:37 PM   #63
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Quote:
Originally Posted by 4TehNguyen View Post
he officially hit 833 mph, which is 1.25 mach. They said on the stream they have to build the speed as much as they could before 100k feet because thats when the air resistance starts building and decelerating the dive. Terminal velocity for him is much less than the speed of sound. Only way to get that speed is to dive where the air is extremely thin, and where they did dive it was nearly a vacuum and virtually zero air resistance,
Not sure where you got your values from but from what I've seen (and see again) on the video he reached max velocity of 729 mph which is around what I said (~1173 Km/h) which is ~0.96 mach.

Watch min 1:18


I did not see or hear a sonic boom. If he did reach max velocity of 833mph as you say please post your source.
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Old 10-14-12, 07:50 PM   #64
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nice video recap, thanks.

Quote:
Originally Posted by Kalogerus View Post
Not sure where you got your values from but from what I've seen (and see again) on the video he reached max velocity of 729 mph which is around what I said (~1173 Km/h) which is ~0.96 mach.

Watch min 1:18

I did not see or hear a sonic boom. If he did reach max velocity of 833mph as you say please post your source.
actually the same video you quoted, right at 1:14 says he hit 833mph.
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Old 10-14-12, 08:05 PM   #65
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thanks for sharing...
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Old 10-14-12, 09:12 PM   #66
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Quote:
Originally Posted by Kalogerus View Post
Not sure where you got your values from but from what I've seen (and see again) on the video he reached max velocity of 729 mph which is around what I said (~1173 Km/h) which is ~0.96 mach.

I did not see or hear a sonic boom. If he did reach max velocity of 833mph as you say please post your source.
On the official website it says top speed reached was ~1342 km/hr which is ~833mph. Where that reading came from, who knows, maybe the instrument pack he was wearing. At that altitude you wouldn't get a sonic boom that's very audible as the atmosphere is way too thin. Even he states he did not feel it.

Either way, he broke the previous record and most likely broke the sound barrier. Mach 1, the speed of sound, is different depending on altitude so it all depends on his speed at a certain altitude.
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Old 10-14-12, 09:18 PM   #67
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WOW! Amazing...glad he landed safely! Thx for sharing!
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Old 10-14-12, 10:27 PM   #68
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Quote:
Originally Posted by Kalogerus View Post
I did not see or hear a sonic boom. If he did reach max velocity of 833mph as you say please post your source.
on the official site says 833, and i don't think he's big enough to create a boom???
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Old 10-14-12, 11:07 PM   #69
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Evidently you haven't been downrange of a shooter (and hope you never are). The sharp crack of a bullet passing over is actually it's "sonic boom",
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Old 10-14-12, 11:14 PM   #70
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Quote:
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Evidently you haven't been downrange of a shooter (and hope you never are). The sharp crack of a bullet passing over is actually it's "sonic boom",
you're exactly right. I retract my statement as you can "crack" a whip, and that's essentially the tip of the whip breaking the sound barrier...cool whip.
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Old 10-15-12, 05:06 AM   #71
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maybe air density was too low for one.
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Old 10-15-12, 08:19 AM   #72
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Quote:
Originally Posted by bitkahuna View Post
actually the same video you quoted, right at 1:14 says he hit 833mph.
You're absolutely right, I totally missed that. Kudos.
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Old 10-15-12, 08:30 AM   #73
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Quote:
Originally Posted by 4TehNguyen View Post
maybe air density was too low for one.
You're right. The shock wave is caused by air molecules bumping into each other . . . a altitude (lower pressure) the shock wave doesn't form. However the speed of sound refers to the transmission of sound through a gas at altitude (also affected by temperature and composition of the gas). On Mars, for example, the "speed of sound" is somewhat different than here on earth. Here's a handy calculator for the speed of sound from NASA's "Kids Page" http://www.grc.nasa.gov/WWW/k-12/airplane/sound.html

Last edited by Lil4X; 10-15-12 at 08:38 AM.
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Old 10-15-12, 08:31 AM   #74
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sonic booms are shockwaves and for a shockwave to happen you need a media for it to transfer through. Hard to have a shockwave when the air density is very low when he hit the sound barrier.
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Old 10-15-12, 09:09 AM   #75
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Holy cow! That must've been a helluva rush

So glad he made a safe landing too
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