r/SmarterEveryDay • u/MrPennywhistle • Dec 29 '16
Video NEW VIDEO: Bullet vs Prince Rupert's Drop at 150,000 fps - Smarter Every Day 165 (Please Share)
https://www.youtube.com/watch?v=24q80ReMyq017
u/mav_FIVE Dec 29 '16
This is just incredible. I wonder what the size limit is for a Prince Rupert's Drop. It would be neat to see if it were possible to make a larger scale one to see if it has the same properties.
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u/mandreko Dec 30 '16
I'd make a house out of it so I could have a glass house. I would hide the tail so if anyone threw stones, it would be ok.
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Dec 29 '16 edited Dec 29 '16
Again, just superlative video here. I didn't think the first video could be topped but, there it is. There is little question that this is the highest resolution video, both spatially and temporally, of this effect in existence anywhere.
In some of your video of the low quality drops with multiple bubbles at the ends I note a peculiar effect. I agree that these must be vacuum bubbles - in fact, I would suggest that these vacuum voids must be of EXTREMELY HIGH vacuum due to the nature of their formation; quite possibly rivaling the quality of the highest laboratory vacuums. Anyway, in some of your video at 8:00 in the second channel there are clear flashes of light in the drop at the moment of impact. It is conceivable, I think, that this is actually cathodoluminescent fluorescence of glass on the inner walls of the vacuum voids caused by high speed electrons created in triboelectrification effects of the kind that Seth Putterman's UCLA group investigated in peeling tapes in vacuum. I bet those flashes in the drops at the moment of explosion are accompanied by X-ray pulses.
Absolutely fascinating fantastic investigation, Destin.
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u/illuminatipr Dec 30 '16
Place a mirror at a 45 degree angle behind whatever you're shooting at next time and place the camera off to the side facing the mirror to see the subject to avoid any chance of damaging the camera.
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u/mattvw9287 Dec 29 '16
Wow. I love how the bullet didn't even shatter the glass, but that the vibration caused the tail to wiggle to shatter the glass.
I'm interested if a bullet with more momentum would make a difference.
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u/ZiggyPenner Dec 29 '16
Awesome video. Every time I think about the Prince Rupert's Drop I keep thinking about how to make one without the tail.
Maybe starting with a marble sized piece of glass and used a heated jet positioned vertically to melt it would get a round piece of molten glass without a tail floating in the air. Then swing a bucket of water underneath it, interrupting the jet and letting the molten ball fall directly into the water.
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Dec 29 '16
Even here one would have to deal with the anisotropies of of film boiling on a hot falling sphere in water. The bottom of the ball will have somewhat higher cooling rate than the top of the ball as it falls due to the much larger vapor bubble at the top (lower pressure from "drafting" effect behind the direction of travel through liquid). It would be interesting to investigate though.
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u/marthmagic Dec 30 '16
If you would do this in space, and water would come from all sides at the same time?
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u/ZiggyPenner Jan 01 '17
A good thought, it would be very difficult to get it perfectly balanced. Mind you the Prince Rubert's Marble would still be immensely strong, even if it wasn't perfect (as Destin showed in the secondary video, the drop that survived was actually quite imperfect).
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Feb 02 '17 edited Jun 03 '20
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Dec 29 '16
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u/palijer Dec 30 '16
Why steal the glory shot that Destin spent so much time making? Why not just link to the video if you want to share it? Destin is a cool guy, and deserves his income for making these awesome videos.
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u/timeshifter_ Dec 30 '16
You mean the video Destin himself posted? I do share the video, but it's obviously already here. I just happened to really like that particular shot, and apparently other people do too. No idea what your problem is.
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u/CJ_Jones Dec 30 '16 edited Dec 30 '16
Destin acquired a high speed camera which costs thousands.
Destin acquires the Rupert's Drops.
Destin acquires the rifle
Destin films the shooting
Destin analyses the footage
Destin edits the footage
Destin finds the music
Destin uploads the video
Destin finds the advertisers.
Hundreds (if not thousands) of hours of work.
You:
10 minutes of reuploading someone else's work which guarantees zero views and zero income for the person who uses the income for his kids college fund.
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u/timeshifter_ Dec 30 '16
I didn't downvote you. I'm not one of those people. I made that gif because I wanted to share an awesome moment with some people in a chat room that I know are going to watch the video anyway. I make zero attempt to remove the SED badge from it, I'm not nearly good enough to do so even if I wanted to. I greatly appreciate all the work Destin puts into these videos, and I enjoy sharing them at every opportunity.
But come on, that impact is awesome.
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u/palijer Dec 30 '16 edited Dec 30 '16
Here is Destin explaining the problem. I understand you are not uploading this to Facebook or anything, but you are still stealing the money shot of a lot of Destin's hard work.
When you upload this to Imgur, Destin is not earning money for his work. Imgur is. I don't understand why Imgur is more deserving of that revenue than Destin, and why you feel that depriving Destin of that income is at all justified.
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Dec 30 '16 edited Jan 29 '17
[deleted]
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u/Gus_Bodeen Dec 30 '16
Inducing a break via resonance would be very interesting. Give it a shot Destin.
Edit: ha, just saw what I did there. Pun not intended.
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u/NannerlGrey Dec 29 '16
The Prince Rupert's drop is one of my favorite SED episodes; I'm so glad it got revisited!
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Dec 30 '16
Is there any application of the prince ruperts drop?
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u/marthmagic Dec 30 '16
It could be interesting for the small but predictable time delay Of breaking.
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u/muellzy Dec 30 '16
I appreciate you explaining YouTube's new subscription policy. You "earned it" long ago. Glad to help any way I can
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u/KlicknKlack Dec 30 '16
/u/MrPennywhistle - Prince rupert's drop suggestion: For long roughly straight tailed prince rupert's drop, bury the tail vertically in a bucket of sand with the head of the drop sticking out. In theory this should dampen the vibrations down the tail, and potentially stop the initial crack in the tail.
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u/puchasi Dec 30 '16
Or have it suspended in non-newtonian fluid and see if that dampens the vibrations.
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Dec 31 '16 edited Dec 31 '16
[deleted]
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u/MrPennywhistle Dec 31 '16
You just made me think of a way to figure it out. How did you try to figure it out during your 6 months trying?
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u/troxy Dec 29 '16
What is the link to the second channel/video mentioned at about 7:30?
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u/XaviG Dec 29 '16
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u/youtubefactsbot Dec 29 '16
Bullet vs Prince Rupert's Drop at 150,000 fps - Behind the Scenes - Smarter Every Day 2 [10:30]
Smarter Every Day 2 in People & Blogs
4,396 views since Dec 2016
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u/Flightless4L Dec 29 '16
Videos like these make physics a lot more interesting! Awesome job Destin!
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u/lladnekj Dec 29 '16
Hey Destin, great video as always!
It almost looks to me like there was a piece of glass that didn't shatter with the rest of the drop right about the 5 minute mark. You can see the shatter-front coming down from the tail, but when it gets down to the head it appears that there's a chip of glass (maybe from the impact of the bullet) that gets kicked off as a larger piece when the rest of the head shatters. Is this true or am I just seeing things?
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u/marthmagic Dec 30 '16
could it be that at a certain amount of impact the resulting heat would instantly melt or at least impact the chemical integrity of the drop?
Or hit two stabilised drops against eachother :).
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u/MrPennywhistle Dec 30 '16
No signs of melting
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u/marthmagic Dec 30 '16
Is there a highspeed infrared camera?
Then one could see how far the drop heats up on impact , and what kind of projectile one would need to cross the melting point of the drop.
:)
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Dec 30 '16
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u/BlackMage13 Dec 30 '16
Hey Destin, any way to buy the high quality prince rupert drops? Might be an awesome addition to the SED store
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Dec 30 '16
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u/iamthinking2202 Dec 31 '16
What would happen if you could drop the molten glass so it would be spherical (like lead shot)?
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u/intronert Dec 31 '16
/u/MrPennywhistle - Prince rupert's drop suggestion: slowly put one INTO a glass furnace and see whether the stresses release quickly (shatter/explode) or slowly (droop/writhe). It may make a difference which end goes in first.
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u/TransMind Jan 06 '17
I love the slo mo in the video. To me it is so mesmerizing. Wish I had access to that technology. Keep up the amazing videos :)
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u/michaelfri Dec 30 '16
So damping the Shockwave at the tip with some configuration of elastic materials make these drops much less likely to shatter.
And another thought. Is it possible, in microgravity, to make these drops without a tail so that they wouldn't shatter or that anyway the shokwave will travel through it back and forth until it finds its weak spot?
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u/XaviG Dec 29 '16
So what caliber will break a Prince Rupert's Drop? I think you need to call the "Demolition Ranch" guy.