High Speed Camera Bullet Impact
- Thread starter markT
- Start date
farmerjohn
Gold $$ Contributor
Thanks for that, watched a little bit on the phone, sent the rest to my wife and am going to watch it tonight on her laptop. If you find that prairie dog shot I will help you with the cost.... John
farmerjohn
Gold $$ Contributor
Before I got into this cancer fight that took a year and a half out of my plans, I spent several bucks on a 20 practical just so I could watch it real time . Maybe this spring.... JohnI've caught several poodle impacts on a regular video camera. Impressive stuff to watch. If you'll pay for the high-speed camera I'll be happy to get plenty of vids for ya.
May not be combustion, but superheated air glowing.
RegionRat
Gold $$ Contributor
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.
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.
AckleymanII
Gold $$ Contributor
Would be real nice to see various primers go off in slow motion also! I think that those videos would shock most!
Dusty Stevens
Shiner
I think it was either the benchrest shooting primer or glenn newick’s book showed a frame from a high speed shot of each primer
AckleymanII
Gold $$ Contributor
Dusty, a photo in time is very different than showing a slow motion video as you know, but Glen's book would be a great start!
itchyTF
Gold $$ Contributor
That’s all the PETA people need!
Dusty Stevens
Shiner
Primer Flash Test Photos
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