c12hris 24 November 2008 08:20 AM
I want to ask how to create the flame of gun shot. Any help is much appreciated!!!!!!!! :)
Sorry, I can’t help myself here: Typically speaking, Hollywood & the Video game industry has transformed average joe’s understanding of all “assault rifles”, submachine guns, etc firing as being something that shoots as much flame as it does bullets. While your goal in this world may be to keep “average joe’s” expecation inline with whatever you are doing, I do want to add the following caveats:
Any rifle caliber assault rifle that has a flash suppressor (not a sound suppressor) on it, almost never has muzzle flash. If there is a flash, it is typically about .25 sec long (single shot), and usually only visible at night (looks more like a spark). What you see in movies are blanks that are loaded with a powder that is actually designed to have a higher “flash” upon exiting the barrel. Modern cartridges are designed to burn up the entirety of their powder (in order to be efficient) in the barrel. As well, the higher quality cartridges actually contain “flash suppressant” material in the powder itself . Barrel length does have an effect on this though (ie; extremely short barreled rifle caliber sub-guns -10-inchs- can have flash - but only a very few spec ops guys like NSW DevGru and Delta use them). This is because the powder cannot burn itself up in a barrel that the catridge was never designed for (their are exceptions here also, but I am trying my best to keep this short).
AK-47s (the most common assault rifle in the world) typically do not have built in flash suppressors (again, not a sound suppressor), and can have a muzzle flash. That said, again, most common cartridges for this caliber today are built to maximize their powder burn in the 16-inch barrel of the AK and all it’s cousins. Muzzle flash here can be a 50/50 scenario, but in daylight will barely be visible in many cases. At night, it is much move visible. Some of the newer AK clones do come equipped with “craptastic” flash suppressors. Be aware of what you are modeling and have your flash reflect it.
In the real world, the air around the end of the barrel of most assault rifles is extremely “disturbed” to say the least. Often, their is a faint black smoke in a pattern reflecting the flash suppressors design, and a severe “compression” of air there. This is visible for .25secs (single shot) if you are looking for it. It is especially visible in full auto mode (the air compression, and faint black smoke).
Now, there are certain large caliber machine guns in the military inventory, that can have considerable muzzle flash. The M2 .50 Caliber often does (although many Army units, and some Marine units are now attaching flash suppressors to these), as does some of the 7.62x51mm “mini-guns” (vulcan style). As well, large caliber guns attached to helicopters, etc can be expected to have a rather large flash.
Most pistols do not have a muzzle flash at all, but can in some instances. In shooting my Glock model 22 (.40S&W) at a defensive pistol course I took a while back (wherein we were all being taught how much our specific “carry” ammo flashed at night) most peoples ammo barely did anything at all. Usually, just a spark to nothing at all. This, again, is due to modern defensive cartridges being designed with flash suppresant materials in the powder, and the burn time of the powder (actually, how fast or slow the powder burns in the barrel) maximized for the common barrel length of the given cartridge.
Finally, one other interesting feature about assault rifles in the real world, the entire gun flexs during firing. There are some great slow-mo videos on youtube.com of a guy who captured this at a hi-frame rate (he just put them up recently). It is absolutely incredible to watch. He did an “AK” style rifle, an AR-15/M4 style rifle, and some handguns. Don’t bother trying to animate that, it’s not visible to the nake eye, otherwise I would have known about it decades ago!!!!
Anyways, sorry for the rant, as a firearms enthusiast, 99&#xof; hollywood movies, and video games just aggravate me in their ridicuosly bad understanding of modern firearms. I would be happy to expand on the above if you have other firearms questions and you don’t want to trust Hollywood for your answer!
Regards,
Andrew
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