Fire forming on flame fronts of pressure waves
August 19, 2015 8:15 AM Subscribe
The Mythbusters record a bullet leaving a gun at 73,000 frames per second.
Shot with a Phantom V2010 from Vision Research who also have a slow motion gallery.
Shot with a Phantom V2010 from Vision Research who also have a slow motion gallery.
At 180,000FPS you can see attack ships on fire off the shoulder of Orion.
posted by grumpybear69 at 8:40 AM on August 19, 2015 [7 favorites]
posted by grumpybear69 at 8:40 AM on August 19, 2015 [7 favorites]
Well, you can bet what's going on my christmas wishlist this year. Buy Now!
posted by I-Write-Essays at 8:51 AM on August 19, 2015
posted by I-Write-Essays at 8:51 AM on August 19, 2015
Quick google tells me that is a hundred thousand dollar camera. Ouch. I couldn't find one for rent.
posted by bukvich at 9:06 AM on August 19, 2015
posted by bukvich at 9:06 AM on August 19, 2015
Also this guy had a weird amount of fun making this video: The Glock Pistol Why So Popular?
posted by bukvich at 9:09 AM on August 19, 2015 [2 favorites]
posted by bukvich at 9:09 AM on August 19, 2015 [2 favorites]
What are the bits of grit that come last out of the barrel ? Grains/grit of the burned (or incompletely burned) powder ? Parts of the primer (like the little metal scaffolding) ? Barrel gunk (lube/dirt/small flecks from the copper jacket, etc) ?
posted by k5.user at 9:12 AM on August 19, 2015
posted by k5.user at 9:12 AM on August 19, 2015
Unburnt powder, k5.user.
posted by Punkey at 9:15 AM on August 19, 2015 [1 favorite]
posted by Punkey at 9:15 AM on August 19, 2015 [1 favorite]
Mod note: Couple comments removed; we have had and will continue to have lots of opportunities to talk about gun violence, the NRA, etc; maybe we can let this thread just be about physics and high-speed videography and let that stuff sit.
posted by cortex (staff) at 9:26 AM on August 19, 2015 [12 favorites]
posted by cortex (staff) at 9:26 AM on August 19, 2015 [12 favorites]
So it would appear that "muzzle flash" isn't just a Hollywood special effect.
posted by tommasz at 9:45 AM on August 19, 2015
posted by tommasz at 9:45 AM on August 19, 2015
The gun appears to be a Para M1911 pistol manufactured in North Carolina, USA. The muzzle velocity is 825 ft/s which is pretty slow relative to modern handguns. I guess this is why they selected it for this purpose. The muzzle velocity of a comparable Glock firing a smaller 9mm round is over 1200 ft/s.
posted by three blind mice at 10:03 AM on August 19, 2015 [2 favorites]
posted by three blind mice at 10:03 AM on August 19, 2015 [2 favorites]
(If anyone is having trouble loading the video, turn off your ad blocker.)
posted by Johnny Wallflower at 10:34 AM on August 19, 2015
posted by Johnny Wallflower at 10:34 AM on August 19, 2015
(And if you are Canadian, eschew patriotism and chose the US feed.)
posted by ricochet biscuit at 10:53 AM on August 19, 2015
posted by ricochet biscuit at 10:53 AM on August 19, 2015
Are there any similar videos of a nuclear bomb going off?
posted by Brandon Blatcher at 10:57 AM on August 19, 2015
posted by Brandon Blatcher at 10:57 AM on August 19, 2015
Three Blind Mice: "The muzzle velocity is 825 ft/s which is pretty slow relative to modern handguns. "
Dumb question: is muzzle velocity a function of the gun or the bullet? If I put the same 9mm bullet in two different guns, would the muzzle velocity be appreciably different from one another?
posted by MrGuilt at 11:57 AM on August 19, 2015
Dumb question: is muzzle velocity a function of the gun or the bullet? If I put the same 9mm bullet in two different guns, would the muzzle velocity be appreciably different from one another?
posted by MrGuilt at 11:57 AM on August 19, 2015
Dunno about video Brandon, but there's some pics of the first few milliseconds of some test detonations.
posted by quinndexter at 12:22 PM on August 19, 2015
posted by quinndexter at 12:22 PM on August 19, 2015
Saw this the other day - so, so cool. Fire!
posted by LobsterMitten at 12:51 PM on August 19, 2015
posted by LobsterMitten at 12:51 PM on August 19, 2015
(If anyone is having trouble loading the video, turn off your ad blocker.)
Or view it here.
posted by kisch mokusch at 1:19 PM on August 19, 2015
Or view it here.
posted by kisch mokusch at 1:19 PM on August 19, 2015
Dumb question: is muzzle velocity a function of the gun or the bullet?
Not dumb at all. Pretty complicated question. Weight of bullet, kind/amount of powder charge, length of barrel, shape of bullet, all things that affect muzzle velocity. Comparing a .45 vs a 9mm, I think the primary thing affecting muzzle velocity is probably the weight of the bullet, .45 generally being heavier.
posted by 2N2222 at 1:27 PM on August 19, 2015 [1 favorite]
Not dumb at all. Pretty complicated question. Weight of bullet, kind/amount of powder charge, length of barrel, shape of bullet, all things that affect muzzle velocity. Comparing a .45 vs a 9mm, I think the primary thing affecting muzzle velocity is probably the weight of the bullet, .45 generally being heavier.
posted by 2N2222 at 1:27 PM on August 19, 2015 [1 favorite]
Yay, vortex rings!
Vortex rings look just as awesome in water with dye dispersion experiments as they do in this video.
posted by oceanjesse at 1:56 PM on August 19, 2015
Vortex rings look just as awesome in water with dye dispersion experiments as they do in this video.
posted by oceanjesse at 1:56 PM on August 19, 2015
(If anyone is having trouble loading the video, turn off your ad blocker.)
I had to disable both ABP and Ghostery to get theadsvideo to play.
posted by Thorzdad at 2:40 PM on August 19, 2015
I had to disable both ABP and Ghostery to get the
posted by Thorzdad at 2:40 PM on August 19, 2015
Here is a YouTube link if Ghostery is blocking you (like it was me).
Muzzle velocity has many variables: barrel length, gunpowder type (some burn fast, some slow) and action type all play into it. When you see a big muzzle flash that means gunpowder is burning up outside the barrel. It doesn't make the bullet go faster and it is obnoxiously loud. A longer barrel fixes this by giving the powder more time to burn before the bullet leaves. Faster burning powder will fix it too. A revolver has a gap between the cylinder and the barrel, with a semi auto the chamber and the barrel are one solid piece. The gap on a revolver lets high pressure gas escape and you lose velocity. It makes a big flash in photos too.
posted by Bee'sWing at 5:18 PM on August 19, 2015
Muzzle velocity has many variables: barrel length, gunpowder type (some burn fast, some slow) and action type all play into it. When you see a big muzzle flash that means gunpowder is burning up outside the barrel. It doesn't make the bullet go faster and it is obnoxiously loud. A longer barrel fixes this by giving the powder more time to burn before the bullet leaves. Faster burning powder will fix it too. A revolver has a gap between the cylinder and the barrel, with a semi auto the chamber and the barrel are one solid piece. The gap on a revolver lets high pressure gas escape and you lose velocity. It makes a big flash in photos too.
posted by Bee'sWing at 5:18 PM on August 19, 2015
Great. Not only did the video play at around 2fps (oh, the irony) on the original link, but the work-around - not 'turn off your adblocker/Ghostery', because I do that for MeFi and NOBODY ELSE, ok? - lands me on YouTube.
YouTube's algorithms already think I'm some kinda survivalist yuk, because my fondness for weird radio lands me firmly in the prepper bin, and now I'm looking at gun pron. I don't like robots thinking bad of me. And because I don't use MeFi in my anonymous environment (VM, fresh OS install, VPN - how much of this is cargo cult, how much sensible precaution, I can't answer) YouTube (and the rest of the Google) knows exactly who I am.
So I loved the video, and I lust after the camera, and I have a solid brorection for Mythbusters, and anything that gets beneath the skin of exciting physics is absolutely fine by me.
Yet still I feel like I've been caught smoking in church.
Complicated things, these intarwebs.
posted by Devonian at 5:33 PM on August 19, 2015
YouTube's algorithms already think I'm some kinda survivalist yuk, because my fondness for weird radio lands me firmly in the prepper bin, and now I'm looking at gun pron. I don't like robots thinking bad of me. And because I don't use MeFi in my anonymous environment (VM, fresh OS install, VPN - how much of this is cargo cult, how much sensible precaution, I can't answer) YouTube (and the rest of the Google) knows exactly who I am.
So I loved the video, and I lust after the camera, and I have a solid brorection for Mythbusters, and anything that gets beneath the skin of exciting physics is absolutely fine by me.
Yet still I feel like I've been caught smoking in church.
Complicated things, these intarwebs.
posted by Devonian at 5:33 PM on August 19, 2015
The gun appears to be a Para M1911 pistol manufactured in North Carolina, USA. The muzzle velocity is 825 ft/s which is pretty slow relative to modern handguns. I guess this is why they selected it for this purpose. The muzzle velocity of a comparable Glock firing a smaller 9mm round is over 1200 ft/s.
The text in the video (I used the CNN link above because the original link caused a scripting warning) said 1200 fps; I wonder which is the correct number?
Also this guy had a weird amount of fun making this video: The Glock Pistol Why So Popular?
I'm actually planning to buy a Glock either this weekend or next, whenever I have the time to swing by the store, so the gun porn links are well-timed. But good grief, the number of amateur gun review videos on youtube is astounding.
posted by Dip Flash at 6:01 PM on August 19, 2015
The text in the video (I used the CNN link above because the original link caused a scripting warning) said 1200 fps; I wonder which is the correct number?
Also this guy had a weird amount of fun making this video: The Glock Pistol Why So Popular?
I'm actually planning to buy a Glock either this weekend or next, whenever I have the time to swing by the store, so the gun porn links are well-timed. But good grief, the number of amateur gun review videos on youtube is astounding.
posted by Dip Flash at 6:01 PM on August 19, 2015
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posted by longdaysjourney at 8:34 AM on August 19, 2015 [7 favorites]