WATCH: What Happens When a Bullet Hits an 'unbreakable' Prince Rupert's Drop

[AdamM 42]

This is way cool...

 

For those of you who aren't familiar with the Prince Rupert's drop, this weird, scientific enigma is a glass object that's created by dripping molten glass into very cold water.

 

http://www.sciencealert.com/watch-what-happens-when-a-bullet-hits-an-unbreakable-prince-rupert-s-drop

[Old Glock guy 1,127]

That is truly amazing to watch! Thanks for posting it.

[owg666 2]

Wow !!! That's all I can say. Thanks !!!

 

 

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[tattooo 220]

I dont see a link

 

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[Rob0115 1,105]

Very cool. 

[124gr9mm 859]

I dont see a link

 

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How about this:

 

 

 

[tattooo 220]

Perfect....thank you

 

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[Krdshrk 3,877]

Saw this when it first came out - it's pretty awesome.  He's also straight up lead .22LR too, not plated/jacketed.  

[Kevin125 4,772]

Way cool.

[TrentonShooter 22]

Nice stuff. Very interesting!

[diamondd817 827]

Sooooo, it's not unbreakable then?

[DirtyDigz 1,812]

Wonder what would happen if the whole drop was encased in something (rubber?) that would absorb the shock of the impact...

[Sota 1,191]

I wish he'd taken measurements of that one near perfectly straight drop. I want to calculate the speed of the shockwave as it travels through the drop.

 

SCIENCE TIME!

 

Observation:

shockwave appears to traverse length of drop at least 5x as fast as bullet fragments.

 

Estimates:

speed of average .22lr LRN 40gr bullet: 1100fps

equivalent length of Drop is approximately 2 bullet lengths inside of barrel from muzzle

 

Emperical data from video (time codes):

0.542ms bullet appears

0.604ms travel 1 bullet length

0.989ms bullet impact

1.031ms break wave start

1.135ms break wave end

 

Computed data:

0.062ms per bullet length

0.571ms bullet transit time (with 2 extra lengths)

0.042ms shock wave duration

0.104ms break wave duration

 

Since the length of the Drop and the distance traveled by the bullet are the same, they are factored out.

As such, the relationship of our velocities of bullet and break wave or shock wave, are directly related to time.

We therefore get estimates of:

break wave velocity of 6,039 fps

shock wave velocity of 14,955 fps

Prince Rupert Drop length: 7.5"

[Krdshrk 3,877]

I wish he'd taken measurements of that one near perfectly straight drop. I want to calculate the speed of the shockwave as it travels through the drop.

 

SCIENCE TIME!

 

[fishnut 2,358]

 

I wish he'd taken measurements of that one near perfectly straight drop. I want to calculate the speed of the shockwave as it travels through the drop.

 

SCIENCE TIME!

 

says a star wars fan

[Zeke 5,504]

What's wrong with the Lucas masterpiece known as starwars? Lucas should adorn Mt Rushmore!

[Sota 1,191]

says the dude who's probably more nerd than me.

[Zeke 5,504]

Is this Gonna be a nerd fight?

 

I'd be impressed if you can can calculate to the oscillations and adding friction the delta.

Coefficient this

[Krdshrk 3,877]

Is this Gonna be a nerd fight?

 

I'd be impressed if you can can calculate to the oscillations and adding friction the delta.

Coefficient this

[Zeke 5,504]

My tongue is more talented than

Steven Hawking 's

[Zeke 5,504]

Mind...

Awkward....