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FORUMS Photo Sharing & Visual Enjoyment Still Life, B/W & Experimental 
Thread started 22 Apr 2016 (Friday) 23:46
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Air Rifle v Wine Glass

 
Tyguy
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Apr 22, 2016 23:46 |  #1

My wife gave me a few old wine glasses to dispose of. Had an idea and set up an air rifle, Arduino-based flash trigger, and went to town on them. Came out with two good shots.

My buddy had an idea and is going to buy a dozen Ikea glasses to do some more photos... We are going to do a series, first with the pellet just at impact, a few partially through the glass, and a final one as it is exiting the glass. Will post when we are finished!

1.

IMAGE: https://farm2.staticflickr.com/1556/26495101452_a5c5606d4f_b.jpg
IMAGE LINK: https://flic.kr/p/Gnhj​A1  (external link) SmashCam 001 (external link) by Tyler Gerritsen (external link), on Flickr
2.

IMAGE: https://farm2.staticflickr.com/1558/26314466970_3edf844c55_b.jpg
IMAGE LINK: https://flic.kr/p/G6jw​fo  (external link) SmashCam 002 (external link) by Tyler Gerritsen (external link), on Flickr

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DutchinCLE
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Apr 23, 2016 07:51 |  #2

The second one is good, the first one is absolutely fantastic. .. looking forward to seeing more.


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Apr 23, 2016 07:57 |  #3

Very nice. Reminds me of the Doc Eggerton images from waaay back. Looks like you on your way to a nice series of images.


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North ­ Dude
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Apr 23, 2016 08:05 |  #4

WOW, these are verry nice and interesting. Can't wait to see more!


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Apr 23, 2016 08:21 |  #5

Subscribed!


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Tyguy
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Apr 23, 2016 08:42 |  #6

Thanks everybody :)

Naturalist wrote in post #17981867 (external link)
Very nice. Reminds me of the Doc Eggerton images from waaay back. Looks like you on your way to a nice series of images.

Wow, he has some amazing work! It's amazing when you think of the equipment available at the time.


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Apr 23, 2016 08:49 |  #7

These are really great. :) I look forward to seeing more, too.

Are the glasses sitting on a reflective surface, or did you add the reflections in post?

What I might really like to see is the entire glass reflected in the surface below.


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Tyguy
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Apr 23, 2016 10:02 as a reply to  @ neacail's post |  #8

Thanks! The reflection is real, surface is moderately reflective (melamine). That's a good idea, will just have to change the framing for next time.

I framed it thinking the pellet may be well past the cup. I thought the framing looked good as is, maybe we can setup two cameras for two different frames.


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Apr 23, 2016 17:48 |  #9

That first one is perfect. Bravo!


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Apr 23, 2016 18:01 |  #10

Fantastic!

Very best,


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Apr 23, 2016 23:00 |  #11

Very well done.


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Skaperen
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Apr 23, 2016 23:26 |  #12

AWESOME!! The glass cracks faster than the pellet. I'd like to also see the cracks in progress.


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Apr 24, 2016 14:35 |  #13

Skaperen wrote in post #17982750 (external link)
AWESOME!! The glass cracks faster than the pellet. I'd like to also see the cracks in progress.

If I remember my materials science correctly the cracks in the glass will pretty much propagate at a constant velocity, irrespective of the velocity of the projectile. Well unless you hit it with really big amounts of energy, such as from say a .308. I don't know what the regulations in Canada are like but here in the UK where we have a 12FPE/16 Joule muzzle energy limit, the average .177 sporting rifle will have a muzzle velocity of around 760 to 780 fps. The liquid in the glass will actually absorb quite a bit of that energy, slowing the pellet even more. So the pellet is very likely to be traveling slower than the cracking speed of the glass.

Not filmed unfortunately, but I have seen some interesting effects when shooting plastic containers of water, with results not being what you might expect. Completely full 1 liter plastic oil bottles, filled completely with water and sealed, when shot at 25m with .308 Win FMJ's the bullet passed though so quickly that it seemed like nothing had happened. The bottle didn't split, so the water couldn't exit the two small holes that were made about half way up, the outside air pressure kept it all in. The 1 Gall plastic drinks container when shot at 10m with a Glaser Safety Slug from a .45 ACP on the other hand was very spectacular, since all of the kinetic energy was dumped into the water.

To the OP, I suggest trying your setup out on water filled balloons, they have some rather good effects too, and air guns have a nice low velocity, which can be I think a big help with them.

Alan


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Tyguy
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Apr 24, 2016 22:44 |  #14

Thanks again everybody! Should have a few more later this week.

BigAl007 wrote in post #17983449 (external link)
If I remember my materials science correctly the cracks in the glass will pretty much propagate at a constant velocity, irrespective of the velocity of the projectile. Well unless you hit it with really big amounts of energy, such as from say a .308. I don't know what the regulations in Canada are like but here in the UK where we have a 12FPE/16 Joule muzzle energy limit, the average .177 sporting rifle will have a muzzle velocity of around 760 to 780 fps. The liquid in the glass will actually absorb quite a bit of that energy, slowing the pellet even more. So the pellet is very likely to be traveling slower than the cracking speed of the glass.

Not filmed unfortunately, but I have seen some interesting effects when shooting plastic containers of water, with results not being what you might expect. Completely full 1 liter plastic oil bottles, filled completely with water and sealed, when shot at 25m with .308 Win FMJ's the bullet passed though so quickly that it seemed like nothing had happened. The bottle didn't split, so the water couldn't exit the two small holes that were made about half way up, the outside air pressure kept it all in. The 1 Gall plastic drinks container when shot at 10m with a Glaser Safety Slug from a .45 ACP on the other hand was very spectacular, since all of the kinetic energy was dumped into the water.

To the OP, I suggest trying your setup out on water filled balloons, they have some rather good effects too, and air guns have a nice low velocity, which can be I think a big help with them.

Alan

In Canada you are required to have a license (PAL) to possess a firearm with a muzzle velocity 500 fps or greater. Therefore most air rifles are just below that speed, but this particular rifle was closer to 1,300 fps (measurable with the setup used to take these photos). I recall shooting a frying pan with a handgun (can't remember the caliber, but was larger... .308?) and the holes were very clean. Then a shot from a .22 LR would stretch out the area around the resulting hole. Completely counter-intuitive, but pretty much the same principle as you described with shooting plastic containers. I wonder if a lower-powered rifle might leave a larger wake as it traveled through the cup?

The balloons are a good idea, might try it...


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Tyguy
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Apr 28, 2016 08:57 |  #15

A few more:

1.

IMAGE: https://farm2.staticflickr.com/1616/26688106165_008daca443_b.jpg
IMAGE LINK: https://flic.kr/p/GEkw​at  (external link) IMG_0081 (external link) by Tyler Gerritsen (external link), on Flickr

We used less colouring in each cup. We also put a few drops in the cup immediately prior to the photo for added effect. There are some interesting effects happening... The Ikea cup glass is different (probably very poor quality). There appears to be cavitation or some other effect happening on the left side of the cups.

2.

IMAGE: https://farm2.staticflickr.com/1538/26688123195_a354253603_b.jpg
IMAGE LINK: https://flic.kr/p/GEkB​e6  (external link) IMG_0069 (external link) by Tyler Gerritsen (external link), on Flickr


3.

IMAGE: https://farm2.staticflickr.com/1447/26084169623_b8bbbfa1fc_b.jpg
IMAGE LINK: https://flic.kr/p/FJYb​St  (external link) IMG_9678 (external link) by Tyler Gerritsen (external link), on Flickr

Unfortunately the Ikea glass behaved differently. We couldn't get a good shot of the pellet travelling through the cup, as the cup would instantly explode.

4.

IMAGE: https://farm2.staticflickr.com/1499/26082297034_b13c419104_b.jpg
IMAGE LINK: https://flic.kr/p/FJNA​ds  (external link) IMG_0088 (external link) by Tyler Gerritsen (external link), on Flickr

5.

IMAGE: https://farm2.staticflickr.com/1653/26688185875_132a6bbbdb_b.jpg
IMAGE LINK: https://flic.kr/p/GEkV​RM  (external link) IMG_0056 (external link) by Tyler Gerritsen (external link), on Flickr

Thanks for looking!

-Tyler
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Air Rifle v Wine Glass
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