High Speed Camera Bullet Impact

[markT]

A photo from a friend.
Perfect shutter timing!

Has to have been sent from a Creedmoor..

 

[jelenko]

PV=NRT still applies...

When you compress things like gas or metals in this context, lots of fun things can happen.

The term called Draper Point is a temperature where there is an overlap between Infrared and Visible spectrums, such that when most metals hit roughly 798 K (525 C, or 977 F) there is the beginning of a dull glow. When you get metals hotter, the glow and color become even more visible.

Now imagine that some of that impact takes metals even higher for a fraction of a second and you have a small zone where the metal is in fact glowing hot, but only from being driven by the momentum of the colder material coming from behind. That zone doesn't extend far and the glow only lasts as long as that pressure is high enough to hold the temperature up.

There are differences between bullet types in terms of what you see in visible or IR cameras. Add the air to the mix and it can get interesting in terms of combustion in addition to plain old IR heating.

They mentioned they will continue to make more videos to include other bullet types and high speed calibers. Just wait till they run ones with enough velocity that the AR plate surface temps flash up and you will see even more drama.

And, all that lead shooting out to the sides was molten first. Amazing how fast things happen.

 

[markT]

A photo from a friend.
Perfect shutter timing!

That is a photo I just keep looking at.. I've seen 1000's of praire dogs come apart but that one photo just tells the story.. Amazing. Would love to have a quality 8"x10" or larger of that to frame..