I need a little bit of help for a project I'm currently working on. I need to identify the physics behind firearms - that being, the forces that come into play when firing (propulsion and recoil) as well as the impact of the bullet. I've tried looking online, but can't seem to dig up any reasonably helpful information. Any help would be greatly appreciated. I hope this is the right forum to post it in.
Cheers!
Watch mythbusters. They have firearms in almost every episode. And its entertaining :smile:
You pull the trigger, which makes a bunch of part move, which makes a "hammer" hit the round. A "round" is a bullet partially encased with a "casing", which is filled with gunpowder. The impact ignites the power inside the casing, which makes an explosion. The casing channels the explosion towards the bullet, which slides out of the casing and down the barrel of the weapon. That's the simplest firearm with real ammunition, older weapons are either simpler (cannons used to be powder with a ball packed in front of it with a fuse from the outside going into the powder) or more complex (Muskets used firing pins to create the spark needed to cause the ignition of the powder, and most were rifled).
[QUOTE=Ehmmett;21341174]Speedy thing come out, speedy thing hits stuff.[/QUOTE]
Fixed.
[QUOTE=Ehmmett;21341378]blah blah blah vidyah gaemz[/QUOTE]
Video Games = Fun
Fun =/= Realism
[QUOTE=Ehmmett;21341378]IRL vs. Games[/QUOTE]
Oh, and just firing a .22 LR round can blow your ears if you don't have protection on, and are nuzzling the gun with your cheeks.
[QUOTE=Ehmmett;21341378]I went to a shooting range, thought deeply about how all of it works. Went so deep into thought that shit started moving in slow motion. It was intense.
Then being a nerd I noticed everything wrong in video games. Muzzle flashes are extremely huge in video games, in actuality, they're hard to see. Iron sights are a bitch to keep perfect, even standing still. Akimbo guns would never work, accurately. Video games have almost one fifth of recoil that there actually is. It is extremely hard to shoot fast and accurately with a pistol. You can't snipe with an AK47 like you can in video games.[/QUOTE]
All of the above is true, except in my case felt recoil seems to have less of an effect than it does in games. I was expecting a 12ga with slugs to recoil like a bitch but it wasn't bad. The M1 Garand felt like firing a very heavy and loud .22, which astounded me.
Through my thoughts, a gun uses the expansive power of gunpowder to project the bullet out of the chamber. When the hammer hits the bullet, it compresses the gunpowder inside the bullet just enough so that it ignites. When gunpowder ignites, it releases a gratuitous amount of gas for the amount of powder that was used. The firing chamber is air tight so the only way for the gas to escape is to force out the bullet. The barrel has spiraling grooves that makes the bullet rotate which helps the bullet go straight.
recoil is part of the gas escaping.
[QUOTE=Ehmmett;21341378]I went to a shooting range, thought deeply about how all of it works. Went so deep into thought that shit started moving in slow motion. It was intense.
Then being a nerd I noticed everything wrong in video games. Muzzle flashes are extremely huge in video games, in actuality, they're hard to see. Iron sights are a bitch to keep perfect, even standing still. Akimbo guns would never work, accurately. Video games have almost one fifth of recoil that there actually is. It is extremely hard to shoot fast and accurately with a pistol. You can't snipe with an AK47 like you can in video games.[/QUOTE]
Most of the times the recoil thing's just so gamers don't get a headache, as recoil's pretty much only been 'punt the view upwards a bit'
I'm getting flashbacks to the .357
[QUOTE=Pie108;21341636]recoil is part of the gas escaping.[/QUOTE]
No, recoil is the opposing force of the bullet pushing on the gun when it is fired.
Force = mass x acceleration
The reason why the bullet goes much faster is because although the force exerted by the gun on the bullet is the same as the bullet on the gun, their masses are different; therefore, the bullet undergoes a much higher acceleration than the gun, and ends up traveling a lot faster.
Thanks all. I appreciate the help.
And I never asked how firearms work - I know that already. I just needed the equations. :smile:
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