High-Speed photo's of bullets

[1969912 0]

The guy who took the pictures built his own flash and flash-triggering system. The bullet passes through a laser beam to trigger the flash. He says the flash lasts ~500 nanoseconds.


Note the angle of the slug after passing through the lemon and the deformation of the one that hit the yogurt container. They're both .38's. The tobacco being pushed in front of the slug on the cigarette picture is interesting.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[quade 3]

You should probably read this; Harold Eugene Edgerton and then see these photos.

Edgerton (aka Papa Flash) took a lot of very, very famous photos. Essentially invented high speed photography. Took or invented the camera that took almost every photo you've ever seen of an atomic explosion in slo-motion or still photograph.

Check this out!

quade -
The World's Most Boring Skydiver

[1969912 0]

Quote

You should probably read this; Harold Eugene Edgerton and then see these photos.

Edgerton (aka Papa Flash) took a lot of very, very famous photos. Essentially invented high speed photography. Took or invented the camera that took almost every photo you've ever seen of an atomic explosion in slo-motion or still photograph.

Check this out!

Yeah, Edgerton pioneered the art. I read his unpublished autobiography in high school. His work was very important in the development of the implosion-type nuclear weapon used at Hiroshima. Pretty interesting guy.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[1969912 0]

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Check this out!

The Rapatronic camera used a solid state shutter based on polarizing filters and a Kerr cell. Mechanical shutters were way too slow. Each camera held enough film for one shot. Those pictures are really strange and creepy looking. The little spikes coming out of the bottom of some of them are the guy wires for the test tower being vaporized by the bright visible light, not from heat. If they wrapped the wires with reflective foil, no spikes would be formed, and if they painted them flat black the spikes would be bigger. Pretty bright light.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[kallend 1,662]

Quote

Quote

You should probably read this; Harold Eugene Edgerton and then see these photos.

Edgerton (aka Papa Flash) took a lot of very, very famous photos. Essentially invented high speed photography. Took or invented the camera that took almost every photo you've ever seen of an atomic explosion in slo-motion or still photograph.

Check this out!

Yeah, Edgerton pioneered the art. I read his unpublished autobiography in high school. His work was very important in the development of the implosion-type nuclear weapon used at Hiroshima. Pretty interesting guy.

That would be Nagasaki. Hiroshima used a gun mechanism, not implosion.

...

The only sure way to survive a canopy collision is not to have one.

[1969912 0]

That would be Nagasaki. Hiroshima used a gun mechanism, not implosion.


Oops. Thank you.


Attached pic is of a grapefruit with some high explosive inside. He said that the temporary plywood table it was sitting on had a 5 inch diameter hole blown in it. You can kind of see the internal wedge structure of the grapefruit in the pic.

His pics are here: http://flickr.com/photos/nebarnix/sets/72157594248654650/

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[rushmc 18]

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That would be Nagasaki. Hiroshima used a gun mechanism, not implosion.


Oops. Thank you.


Attached pic is of a grapefruit with some high explosive inside. He said that the temporary plywood table it was sitting on had a 5 inch diameter hole blown in it. You can kind of see the internal wedge structure of the grapefruit in the pic.

His pics are here: http://flickr.com/photos/nebarnix/sets/72157594248654650/

You have some cool toys!

"America will never be destroyed from the outside,
if we falter and lose our freedoms,
it will be because we destroyed ourselves."
Abraham Lincoln

[1969912 0]

Quote

Quote

That would be Nagasaki. Hiroshima used a gun mechanism, not implosion.


Oops. Thank you.


Attached pic is of a grapefruit with some high explosive inside. He said that the temporary plywood table it was sitting on had a 5 inch diameter hole blown in it. You can kind of see the internal wedge structure of the grapefruit in the pic.

His pics are here: http://flickr.com/photos/nebarnix/sets/72157594248654650/

You have some cool toys!

Here's high speed video of a light bulb hit with a pellet gun. You can see the filament change brightness fron the AC powering the bulb. It takes forever for the filament to burn up after the galss breaks. There's a little clicky below the pic.

http://flickr.com/photos/8846799@N04/560048549/

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[Ralph_W 0]

You may want to take a look at:

http://kurzzeit.com/

Choose English as language at the top right button and then go to examples.

Ralph


BRENNEKE rules.

Silence is golden. www.bt-ag.ch

[1969912 0]

Quote

You may want to take a look at:

http://kurzzeit.com/

Choose English as language at the top right button and then go to examples.

Ralph


BRENNEKE rules.

http://kurzzeit.com/


Cool. Looks expensive.


Here's an onion with HE inside, in the pic it's ~10" in diam. The original onion was ~4" diam.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[shropshire 0]

Seeing the bullet tumble on exit from the lemon is interesting.

(.)Y(.)
Chivalry is not dead; it only sleeps for want of work to do. - Jerome K Jerome

[Ralph_W 0]

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Seeing the bullet tumble on exit from the lemon is interesting.

Most bullets start tumbling after about 4 inch / 10 cm in the target. This is a comon and well documented thing in the ballsitic literature.

Ralph


BRENNEKE rules

Silence is golden. www.bt-ag.ch

[shropshire 0]

Thank for the info.

(.)Y(.)
Chivalry is not dead; it only sleeps for want of work to do. - Jerome K Jerome

[1969912 0]

What causes the tumble? Something to do with the bullet spinning, or is it just deflected to one side as it psses through?

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[warpedskydiver 0]

for the most part deformation, and hydrostatic shock.


It varies depending on the bullet type, shape, balance of its mass, and velocity, along with the physical characteristics that the obeject that was shot exhibits.

But Kallend will be along shortly to tell you I am wrong.

[Ralph_W 0]

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What causes the tumble? Something to do with the bullet spinning, or is it just deflected to one side as it psses through?

Ouch, you caught me on this one. It has been a while since I learned why, so I had to search the literature to give you an answer. Unfortunately the literature is in German, so I can give you a rough translation/explanation. However there should be something to find in English in the books of M.L. Fackler.

Lets try:
- This mostly applies to full metal jacket bullet, not for hollow points.
- There is always a slight angle between the axle of the bullet and the surface of the target. No bullets hits the target at exact 90 degrees, due to the yaw of the bullet and several other factors.

In the media (Gelatine, Body, Onion, etc.) only the tip of the bullet has direct contact with the media. This happens due to the density of the media. Therefore the so called Narrow Channel is formed, which is the part of the cavern that is only approx 1.5 times as wide as the bullet diameter.
As the bullet is slowed down by the media, more bullet surface has contact with the media. Give the fact that the bullet flies in a slight angle, now one side gets more resistance from the media then the other. At a certain point this is not overruled anymore by the twist stabilisation of the bullet. More angle, more one side momentum, a vicious circle, the bullet start turning around. This effect form what we know as temporary cavern, a wide expanded area in the media.

For those who speak German, here is the bibliography:

Sellier / Kneubuehl: Wundballistik, Springer Verlag

Hope this helps

Ralph

Silence is golden. www.bt-ag.ch